Messages & Notes From
emrfd

1.8 to 450 MHz Amp
10.7 mhz if transformer 7-8341
10 KHz wide filter
10 trun pots for sale
100 Crystals for AU$5.00....
100 MHz Crystal Source
100Mhz Crystal Sources?
100uH RF chokes - how to make them?
100uH RF chokes - how to make them? TNX!
10M VFO ideas
10M VFO ideas (my simple ones)
12 MHz if for tx applications
12 MHz quadrature coupled bandpass filter
12BY7A driver to Ten-Tec 6m transverter
13.8V 12V and 5v supply question
14mhz Receiver
160 Meter tuner success
160M QRP NAQCC sprint and 160M QRP homebrew
17.034mhz crystals
18 MHz Transceiver - Voltages
1N4007 in SMT?
1N400x diodes used as PIN diodes - a question
1n914 with jfet vfo
1n914 with jfet vfo: Solved!
2.98 hexfet linear amp, what am I missing?
20 db tap
2009 presentation on high-level mixers
2011 ARRL Handbook offer
2012 ARRL Handbooks and Antenna Handbook
20M 10W BS170 transmitter proto
20m XCVR with "discrete Gilbert Cell Mixer" completed
%20Re%3Afeed%20through%20caps%20and%20multi-hole%20aperture%20core%20ferrite%20beads
%20Re%3Afeed%20through%20caps%20and%20multi-hole%20aperture%20core%20ferrite%20beads
222.1 System for sale
250 MHz SA ADAPTOR ( SA-A)
$28.36 for fifty watts
2N5179 Top view or bottom view
2n7000 Failure
2N7000 failure mode?
2SC1307, 2SC1969
2SC1307, 2SC1969 - IMD or HD?
2SC1307, 2SC1969 - Thanks Jim!
2SC5788, STD1805 (was ERF2030 RF transistor anyone?)
3.3v TI 3253 mux as a QSD?
3 dB splitter
3 very good articles (understanding resistors, avoiding ground loops, modeling skin effect in Spice)
30khz resolution filter-W7ZOI/K7TAU SA
34 mhz crystal or osc.-help
3GHZ VNA
3rd order Input Intercept calculation
4.9152 MHz Crystals
4 pole bandpass filter with FSA 4157 switches
400 MHz VCO
455Khz filter adapting
4cx250 heater
5 Watt Amp Opttions
50 MHz RF Generator
50 ohm stripline
505 kHz experiment
60-120MHz VCO (An ALternative Circuit)
60 Cycle Hum on End Fed Wire
602 oscillator
6GHz spectrum analyzer
7 mhz bandpass filter experiments
7 MHz Oscillator Capacitors
7 MHz RF amplifier EMFRD Chapter 8 Figure 8.22
70 years ago in amateur radio frequency control
74G74 Patato IC circui help needed
74HC4053 mixer vs passive ring diode (ADE-1, TUF-1)
74L04 as an amplifier
75ohm Input Amplifier in 50 System
7Mhz xtal?
9V Li-ion Battery Capactiy
A 435 mhz preamp
A 6L6 lasted forever!
A COMPONENT OF INTEREST
A fascinating cascode-triodes-detector finding--and more (long)
a few thoughts on minimalist radio
A FRONT-END WITH AN IIP3 > +50dBm ?
A Good Old VFO
A HB 100 mHz RF Sweep Generator
A High Isolation Amplifier Produced By JPL
A little bit OT perhaps looking for a source of ones and two for flanged RF resistors
A low distortion QRP linear
A materials question - pcb as capacitor
a minimalist software-defined radio for 15m
A Narrow Xtal Filter / DSO Experiment
A new analog switch
A new high level mixer the LT5551
A NEW VNA
A no-bias LC oscillator
A NO PASS FILTER
A not-so-simple regenerative receiver challenge (Was: Regen musings)
A Phase Modulator that doesn't work
A pic dds with a pll cleanup
a plead about subject labeling
A Problem Of Impedance
A question abot level
a question about O'scope waveform
A Question On Cleaning Up A Variable Tuning Cap
A question on transmatch
A Quick Math Problem
A regenerative detector at IF behind a diode-ring doubly balanced mixer
A Signal Generator
A simple 25 watt linear
a simple overtone oscillator
A simple RTTY generator
A Simple Sweep Generator
A simple toroid question
A strange New I-Q Mixer Invention
A Sudden Thought About The HYCAS Project
A TRANSFORMER-LESS AND FEEDBACK-LESS WIDEBAND AMPLIFIER
Method of Science - A Wiki entry
Replacement for AADE Inductance Meter
AADE Filter Design Software Potential Problem
AADE Filter Program
AADE Frequency counter
AADE L/C Meter Fixture / Adapter
AADE L/C Meter Fixture / Adaptor
About Elecraft K2 Receiver
About fundamental xtals
ACTIVE ANTENNA
Active antenna amplifier
Active Loop Antenna Circuitry
Active Monopole Antenna Amplifier
Active Whips vs. Long Wire Antennas
AD2200 synchronous demodulator - Correction ADA2200
AD2200 synchronous demodulator - Correction ADA2200
ad603aq questions
AD8307 AT .LOW. FREQUENCY
AD8307 based power meter
AD8307 power meter shielding
ad831 dc receiver in files section
AD8310 vs AD8307
AW: AD9912 DDS clock source - just a thought?
ADD REACH TO THE AADE LC METER
Adding a PLL for the POS200.
ADE-1 Mixers
ade mixers
Adjusting IQ Phasing Network in Direct Conversion r\Receiver
Adjusting Values of Toroids
Advanced VHF Wattmeter
Advice needed on Converters for PC-based FFT SA
Advice on selling ham magazines
Advice on textbook references to inter-stage, wide-band RF coupling transformer design theory and background
ADVISORY: AD 8307 in Power Meter Applications
Affects of real component characteristics on BPF response.
Affordable high-power RF caps
After Christmas Book Sale
Against Ugly Construction
Oscillator-multiplier tube rigs - Was: AGC audio chain
AGC help
AGC problem (AD600, AD8307)
AGC questions
AGC-range in mosfet if-amplifier chain/ BFO drift
air core toroids
Air Variable Capicators for sale
All pass filter
AM detection in DC receivers
Am I blocked ????
AM Radios
Amateur Radio Techniques (RSGB book)
Amidon/Micrometals AL value derivation
'corrected' LTSpice and ELR audio amp circuit help needed.
"Buzzy" FET mute switch
"First Receiver"
"Hidden" wine for LTSPICE under Linux
"Polyvaricon" capacitor
"Wrap-around" biasing of an NPN
Amplifier Design
an accurate L meter
AN AD8307 BASED POWER METER MODIFICATION FOR PEP MEASUREMENT
AN ANTIQUE RADIO TECHNIQUE QUERY
An Audio Noise Generator
An Audio Noise Generator - Followup
An Easy Magnet Wire Storage Method
AN HF / VHF Colpitts VCO Variant
AN IMPROVED RF BENCH GENERATOR
An Incidental NE602 Discovery by bkopski
An Incidental NE602 Discovery by bkopski
An interesting brick-wall low pass filter
An Interesting Method Of Tuning Bandpass Filters
An RC-coupled Linear Amp
Analog B/W TV's
Analog Circuit Design: Art, Science, and Personalities - Google Books
Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers
Analog Devices DDS IC's
Analog Meter Faceplate Modifications
Efficient amp's (was: Analog VFO Freq. Stablization)
Analog VFO Freq. Stablization and other thoughs
Ancient FT-243 Xtal Circuits?
and about the lsb carrier crystal for a ladder filter...
Announcing - the FDIM2018 2N2222 POWER CHALLENGE!
Another Approach to DIY PCBs - PCB Press
Another better-than-IRF510 contender: STP16NF06L
Another Mixer
another Mixer level question
Another Software Bug
Another Spectrum Analyzer question
Another trimmer number and a Class E question
Ansoft HFSS experts here?
Antenna Compendium book for sale
Antenna pattern with a drone
Antenna Tuners and Baluns
antennas out of dielectric materials?
Anybody willing to mail me a pair of BN43-202?
Anyone a circuit for a Active High Impedance Scope Probe..?
anyone making progress on surface mount R2?
AOR Proto AR7070
Apache AL13P Laminator is Back
Approaches for low voltage transmitters?
Arduino controlling Si570
Are through hole devices going the way of the vacumn tube?
ARRL CCR / HOA Study
The ARRL Challenge--SSB Vs DSB
ARRL Handbook Projects
ARRL HBC III
Art for Low Noise Audio Chain?
Article on the impact of ultralow phase noise oscillators on system performance
Article translation (was: Video of simple SSB phasing receiver)
Atlas 210x reboot
Attention Manhattan Constructors
attenuator to use with clock oscillator?
attenuators using 33 ohm resistor networks
Audio Amplifiers
Audio DDS as a reference for PLL
audio filter design rules of thumb
Audio filter ringing
Audio Filtering
Audio level for DSB full modulation with DBM modulator
Audio noise limiter
Audio RMS voltmeter schematic needed
Audiophile op-amps (was Capacitance vs frequency)
auto power off circuit?
Automatic bias for a MOSFET power amp and power up
Automatic power off, started out as KA7EXM microWattmeter
AW: 100 MHz Crystal Source
AW: AD9912 DDS clock source - just a thought?
AW: AW: Losses in Diplexer?
AW: BFO Feedthrough into IF
AW: Losses in Diplexer?
AW: Measuring Crystal Parameters
AW: Mixer Termination w/Balanced Amp
AW: Testing Xtal Ladder Filter Impedance
AW: X-Mode Mixer
Bad news, good news, better news
balanced antenna with unbalanced tuner & balun?
Balanced Mixers advantages or disadvantages
balloon beacon
Band Pass Filter Boards
Bandpass Diplexer - W7AAZ
Bandpass Filter Design
Bandpass filters with series resonators: a problem in the design
Basic Low Pass Filter Design
Basic Receiver
BC-348
BCI problems
BD135 as an RF amplifier
BD135 /BD139
BD139-6 versus BD139-16
BD139 RF Power Amp.
Best of Idea Exchange now available
Best Practices for PCBs
Best way to cut open crystal filter?
Beta Cutoff for BJT
Beta / Transconductance (was new with questions)
Better PCB box lids and Sheet metal redux
BF225 transistor data
BF991 discontinued?
BFO and LO isolation ?
BFO Feedthrough into IF
BFR91 equivalent
BG micro trimmers
BGA Inspection - Requesting Suggestions & Guidance
Bi Directional amplifiers in the IF strip
Biasing a NPN for Optimal Q-Point
Bifilar Torriod independant testing and also SA design question
Bill Kelsey - Kanga US
billet aluminum project boxes for sale
Billion Accounts Hacked
Binaural Audio - Off Topic
Binaural experiments--long post
Binaural I-Q Receiver
Binaural / Pseudo Stereo
Binaural Radio (and injection-locked oscillators)
Binaural Radio (and injection-locked oscillators)
Binaural receiver finished
Binaural receiver finished
Binaural receiver listening - experiences
Binaural Receivers
Binaural Weekender?
binocular core winding
Bipolar array input
Bipolar RF Transistor for FLEA TRX
Birdies... coming through the crystal filter, or radiation, or ???
Bit-O-Bitx
Bls: 5 Watt Amp Opttions
book: differences between book's version
Book Sale
Books for sale.
BPF Board
BPF Parts Purchase For European Hams
BPF testing advice
brass permeability at vhf
Bridge-T Diplexer Report
Bridge-T Diplexer Report
Broadband RF design
Broadband RF design (candidate?)
Broadband RF design..new thread Wideband MMIC amplifiers.
Broadband transformer windings
BS-170 PA heatsink
Buffer amplifier distortion
Buffer stage troubleshooting
Buildathon 2010 - book now !
Building a flock of antique sand state qrp units
Building R2 -- Replacement for LM387?
Building the Universal QRP Transmitter
[Bulk] BCI problems
Buying Components
Buying the book: Experimental Methods in RF Design
Buying the book and getting started
Found it! Buzzing noise in DC receiver with no antenna... weird
C0G cap variation?
CA3046 availability
CA3046 squarer
CA3046 Superflexodyne Receiver
CA3046 transceiver in SPRAT
CA3054
CA3055 ??
CA3146
Calculating a Butterworth filter
Calibrating RF Power Meters With DC
Calibration thoughts for popcorn power meter [SQM Kit]
~campbell web page
Can any body help me with a Varactor Circuit?
can any on er .. running a 4cx250b qrp?
Capacitance and inductance
Audiophile op-amps (was Capacitance vs frequency)
Capacitor & Inductor Values In Filters
Part values (was Capacitor value in Regenerative Receiver)
Capacitors for tx output lpf and bisaing Mosfets?
Capacitors used in Transmitter PA filter applications
Carrier oscillator drift revisited
Carrier oscillator drift revisited
Cartesian loop exciter?
Cartesian loop exciter - QSK
Carving up PC board construction, single-point grounding
Causes of Hartley harmonics?
CD Rom replacement
CD4007 = CA3600
Ceramic capacitor values
Ceramic coil forms for sale
Ceramic discriminators?
ceramic resonator power limit?
CERAMIC RESONATOR WANTED
Ceramic resonators
Ceraminc resonator VXOs
Changing position between a mixer's pad and diplexer?
Chapter 10 DSPx/KDSP10 loader
Characterising Unknown Ferrite Beads?
Characterizing Temperature Drift of Oscillators
Charging a super polymer lithium-ion battery
Chat With The Designers is back!
Check out my photos on Facebook
Choosing capacitors
Choosing R and C Values for Active Filters
Circuit design simulation software recommendation?
Clarification
Class-A driver/PA in EMRFD and SSD for 1.8 - 30 MHz
Class C tube amp load resistance
Class D amplifiers...
Class D RF Amplifiers
High Speed Class E Drivers for Paralleled BS170
Class E, 12V, 25W, push pull, 30M high efficiency PA
Class E 475Khz 100w amp [was IRF510 Successor? ]
Class E amplifier design
Classic Document Reconstruction
Classic Multiple Feedback OPA BPF
Cleaning Coils part deux
Cleaning Coils and noodle time
Cleaning Coils part deux
Clipped Sine Wave Info
Clock, hum and woe
CLUB NIGHT and HOMEBREW competition at FDIM 2014
Coax Connections Within Equipment
Codec undersampling question
Cognitive Radio. What is it?
Soldering SMD, was: Collecting and Storing SMD Parts
Collins Mechanical Filter
Colpitts VFO
Combining Low-Pass & High Pass Filters
Comments on PULGA Flea minimal xcvr
Comments on WBR receiver antenna coupling
Common-base differential mic preamp
Simulation vs reality (was Common Gate Amplifiers -- Long Post)
Common Gate FET front end filter
Common Mode Current on DC line?
comparing R2pro with PHASING RECEIVER WITH .TAYLOE. FRONT END
Component sources - now looking for signal generator
Component test fixture........now M3 Digital LCRZ Meter.
Component test fixture........now M3 Digital LCRZ Meter.
component values in EMRFD schematics?
Computer or DSP broadband demodulation (e.g. CW Skimmer)
Conflicting information and quesstion about the SBL1
Contact bounce problem with AADE LC meter....
Contacts of Relays
Conversion Between 75 Ohm and 50 Ohm Systems
Converting a 500W Tesla pulser into CW
Converting VFO circuit to VCO
Copper Plate for QRO FET
Fwd: Copper Tape
Core Loss in High Frequency Inductors
cores
Correction to Fig 6.151 in EMFRD
Coupling Coefficients
CPLD Frequency Counter
Critique my hypothetical multiband LO setup
Critique this class C 80M MJE181 12W push-pull amp
Crumbling 'Solid State Design for the Radio Amateur'
crystal filter basic questions
Crystal Filter Failures
Crystal filter impedance??
Crystal filter matching transformers
Crystal filter - pull frequency?
Crystal filter success! Now matching to a homebrew RX.
Crystal Filter Sweeper
Crystal Filters - IF module
Crystal Information
Crystal Ladder filters above 30 MHz
Crystal motional parameter measurement
crystal pkg for LSB ladder filter
Crystal question
Crystal resistance measurements -- follow up
Crystal resistance measurements -- follow up
Crystal Resonator Filters
Crystal Size for VXO
Crystal Sourcing
Crystal Test Set Designed by Chris Trask
piezoelectric resonator / crystals
Crystals and Crystal Filters
Crystals, Ceramic Resonators and VXOs
Crystals for S7C Simple 7 MHz Superhet
CS2100 synthesizer chip
current commutating mixer's termination senstivity
Current Controlled Inductors
current mirror as a current sink for LM317?
Current replacement for 2SC1906?
Current Source(s) for High Q Crystals
Curve Tracer
Custom crystals
Cutting Copper Clad Board
Cutting PC Board
Cutting PCB
Cutting PCB material with a benchtop shear
CW filters: trade-offs and group delay
CW tone into SSB transmitter audio
CW Waveshaping
Cypress to improve on Si570
DAC Control of VCO
Dayton Booksale
Dayton Special
DBL diode mixer LO level
DBM driven by PECL
DBM max audio drive
dBxxx Relationships
DC Bias
QEX Jul/Aug (was DC-compensated notch filter)
DC Current Gain comparisons
DC Phasing Rigs and SMT Devices
DD 50 to 7 MHz Converter Oscillator
VK5TM DDS Xtal Sub
MS-DDS-60 Controller
[dds_controller] BPF Board
DDS driven PLL
DDS/Micro Noise
DDS module with buffer / amp
DDS Signal Generator Direct Digital Synthsis
DDS vs SiLabs PLLs (was JAN Crystals)
Debugging help: chapter 1 first transmitter low power output
Decoupling capacitors
Delay lines
DeMaw Design Equation
Design tracking PLL, help
Designing Wideband RF Impedance Transformers
Details on MC1496 based SSB Transceiver
Device to read a resonant frequency directly & accurately?
DFN 10-pad package prototyping
DG Mosfets
DG8SAQ VNWA Schematic..
DGMFs
Differential LO Drive
Differential squarewave drive for DBM
Differential to Single-Ended
Difficulty running Specan.exe
Digest Number 1295
Digest Number 1775
Digest Number 2082
Digest Number 2831
Digest Number 2933
Digest Number 471
Digest Number 545
Digest Number 844
emrfd digests
Digikey PNs for ZOI SA/TG
Digital mixers and impedance matching
Digital Readout Noise Problems
digital scope
Digital Storage Oscilloscopes
Diode 1N913
MaCom Reborn!!! WAS: Diode Equivalent
diode mixer termination and degradation
DIODE RING MIXER DISCUSSION FOLLOWUP
Diode ring mixer question
DIODE RING MIXER Sources
Diode Ring Mixers
DIP Oscillators - A Cautionary Tale
Diplexer filters for amplifiers
diplexer frequency for an upconverter
Adjusting IQ Phasing Network in Direct Conversion r\Receiver
Direct Conversion Radio
Directional Coupler Construction
Disc Ceramic Capacitor "Adjustments"
Discontinued Motorola IC's
Front-end preselectors (was Discrete component version of Gilbert Cell Mixer)
Disk broke Need fba
disposing of the etchant
Divide by 2 in Class C amplifier
DIY build of Ebay 45W CW,SSB $14 amp with mods and details.
Do I Need to Use Diplexers?
Don't miss FDIM at Dayton this year!
Double balanced mixer response to LO * 3
Double balanced RF Mixers - 1dB compression point
Double Tuned Circuit Thoughts
Double-Tuned Circuits loaded with a FET
doubly balanced diode mixers and RF-IF port isolation
doug's book on learning transistors
Driving Mixers
Driving Mixers, was: Mixer Purity, JFET+SA602+JFET
DSIP Board
DSO-XXXX test software
DSO2250
DSP-10 PCB
DSP Experimentation Question
DSPx and EMRFD
DTC designing help
DTC losses
Dual Gate MOSFET Amp - Gain and AGC
Dual Gate MOSFET Biasing
Dual-receive circuitry
Dumb (and embarrasing) question RE FQPF11P06 QFET
EA3FXF & EA3GHS and the Pulga
Eagle CAD
EAGLE QSD/QSE layout
Earbuds
Ebay DDS VFO board
Effect of Crystal Load Capacitance
Elantec IC
elecraft k5
Elecraft K5 Info
electret biasing
electric fence enegizer
electrical steppir
Electrolytics as Ugly Standoffs
Electronics Courses
electronics workshop : crystal set reprise
EMFRD Digest
Emitter Follower Output impedance
New file uploaded to emrfd
EMRFD 1.3 [long]
EMRFD 1.34
EMRFD 2.11 power amplifier
EMRFD "First Transmitter" Schematic Discrepancy
emrfd] Atlas 210x reboot
new EMRFD book
EMRFD Book Availability - UK
EMRFD Book For Sale
EMRFD CD on Linux
EMRFD CD on Linux
EMRFD CHP-7 (Sch 7.11)
emrfd digests
EMRFD FBA - A VARIANT
EMRFD FEEDBACK AMPLIFIERS
EMRFD FEEDBACK AMPLIFIERS (my own tests)
EMRFD FEEDBACK AMPLIFIERS . SIMPLIFIED
IC Audio Amps. Was EMRFD Fig 1.17 Audio amp
EMRFD Fig 6.79
EMRFD Files?
EMRFD in the Classroom
[emrfd ] ¿Anyone has the "t ech notes" article o f Allan Vi ctor?
emrfd] Looking for W7ZOI/K7TAU Spectrum Analyzer kit
EMRFD: Mini Circuits sale
emrfd] QST SA 110MHz bandpass filter nearly complete but I have a few questions
emrfd Regenerative Receiver (chapter 1.6)
EMRFD Revised First Edition - 8.5, RF Low-Noise Amplifier
EMRFD Revised First Editon
EMRFD Signal Generator Extender fig 7.28
end of qrp? really!
Envelope tracking
Equal inductor low pass filter - name?
Re Equations
Equipment for sale
Equivalent networks for top-coupled circuit filters
2SC5788, STD1805 (was ERF2030 RF transistor anyone?)
Errata - DTC sidebar on 3.14
EUROPEAN AMPLITUDE MODULATION AMATEUR RADIO GROUP
Evolving my multiband LO chain, G3ROO/GM4ZNX PLL, HC4046 vs HCT9046
Follow up: Excessive current drain in Analog Signal Processor?
Expected loss in TTC
EXPERIMENTAL METHODS - THE HARDWARE PART
experimentalists
Experimenter's Tool
Experiments with a Calibrated Noise Source
Explosion
Fabricate your own vacuum tubes.
Far Circuit Zero Beat Indicator parts list help
Farhan Visits W7ZOI
Fast, high-Z buffer?
Favorite Parts list
FDIM 2010 Challenge
FDIM 2010 Last Call
FDIM 2010 QRP Challenge Clarification
FDIM 2010 QRP Challenge Info request
FDIM 2011 Building Contest
FDIM 2015 Homebrew Contest
FDIM 72 Part Challenge
FDIM Challenge
FDIM Rooms
FDIM Vendors - please register
FDIM2015
feed through capacitor sources
Feed through capacitors source (Was: Looking for W7ZOI/K7TAU Spectrum Analyzer kit)
feed through caps and multi-hole aperture core ferrite beads
Feed thru caps use on VFO
Feedback Amp design Procedure questions EMRF
Feedback Amplifier/Attenuator Pad
Feedback amplifiers in series
Feedthrough capacitor values 1nF (0.001uF) versus 5nF (0.005uF)
Ferrite Core Experiments -EMRFD as a design training tool
Ferrite Core Experiments -EMRFD as a design training tool
Ferrite cup cores
Ferrite mix 31
Ferrite properties
Ferrite tubes, Binocular cores and Ferrite toroids
Ferrite/Villard Cage
FET Balanced Amp Mixer Termination
Fet Noise specs
fet transistor
FFT in LTSPICE
FFT in LTSPICE
Field Day Filters
Fig 11.14 Transmit Chain questions
Fig 8.22 - Modular Direct Conversion Receiver of EMRFD
Figure 3.31 - single crystal filter
FIGURE 5.6 (FET MIXER) analisys with APLAC, a free armonic simulator
figure 6-110 bidirectional amp question
files have been uploaded to show xtal filter scans
Filter alignment
Filter Crystals - A Quick Question
filter design and evaluation by grant hansell
filter design and evaluation by grant hansell
filter design with standard n-multiple parts
Filter layout to minimise unwanted coupling
Crystal filter matching transformers
Filtering simple LO's or BFO's?
Surplus KVG crystal filters
Finger Stock source
first sound ...
Debugging help: chapter 1 first transmitter low power output
First Transmitter Problems
FM

Flea transformer pics
Floating grounds and ground return currents...
Flux residue deemed harmful
Fm transmitter for a repeater
Follow up: Excessive current drain in Analog Signal Processor?
Fools proceed
For Sale: Agilent 34405A DVM - Mint condition
For Sale: Ferrite core collection
For Sale: GW Instek SFG-2110 Function Generator - mint condition
For Sale - Instek SFG-2110 Function Generator
For Sale: Instek SFG-2110 Function Generator - mint condition - Price reduced
For Sale: Instek SFG-2110 Function Generator - mint condition - Price reduced
For Sale: Powdered Iron Core Assortment
For Sale ProtoBoard and PCB Construction Package
For Sale: Switches and Header Stock
For Sale: Trim pots for PCB
For those that bought HF Radio Systems & Circuit - Software Programs
Found it! Buzzing noise in DC receiver with no antenna... weird
Four Days In May (FDIM)
Fourier Transform Machine
Free Handbook
free: noise blanker article delay device
Free parts and EMRFD Errata
FREE Simulation software
Free SMT parts
Free Tektronix Scope and Signal Generator, 100' RG-213 and More
Frequency Counter Calibration
Frequency Counter Chapter 4
Frequency Offset in Phasing Transceivers
Front panel hookup ground loop?
FS: 10 turn potentiometers
FS: 2N4416A
FS: book--Zverev's Handbook of Filter Synthesis
FS: Die-cast Enclosures & Connector Kit (for Spectrum Analyzer project)
FS: Dual Power FET
FS EZ-kit lite and books
FS: HP 1141A/1142A FET Differential Probe and Control/Power Module
FS: HP 1141A Differential Probe System
FS: Lots of parts and semi-kits
FS: Open core coils
FS panel meters
FS - RF Transistors MRF-454's etc.
FS: RFToolKit kits, HYCAS IF AMP Kitlet [un-built]
FS: Spin Master 4803 Hotplate Stirrer
FS: Variable Capacitors
FSK in homemade transmitters
FT Transformer power capacity
FT37-J core
FT950 to Furuno Amplifier Interface
[FtTuthill80] Fwd: A question to Dan Tayloe about audio filters
Full break in transceiver
Full duplex transceiver
Fun challenge: A lab partner for the "Simple, Effective CW Transmitter"
Fun with the 2N7000: Frequency locking and a hybrid pentode/MOSFET mixer
Function Generator
Funk amature magazine project
Fuse needed
Fuses..
Fw: Crystal Reality Check Please
Fw: Digest Number 589
FW: low output IRF510
Fw: measuring crystal parameters
Fw: Method of Science - A Wiki entry
Fw: [QRP-L] THE ARRL KILLED MY DOG!!!
Fw: TI to acquire National Semiconductor - What this means for you
Fw: W7ZOI 14Mhz receiver
Fwd: Copper Tape
[Fwd: MOSQUITO, a QRPn SDR MOSFET TRANSCEIVER]
Fwd: New copy of EMRFD
G3RJV Talk on BATC video website
G4COL Experiments with high current Gilbert cell mixers
Gain of MC1496
Gapping an Impedance Transformer to adjust AL
Gas filled tubes arrestors
Gaussian or Equiripple filters with real crystals beyond Zverev?
Ge diodes: 1N34A vs 1N60 vs AA143
General Coverage Receiver
General Purpose Test Oscillator
general question about DDS chips and such
General question about VSWR and power control
General Radio 1650-A Impedance Bridge Manual and Ap Notes
Generic RF-oriented Si5351A3 library posted to GitHub
Getting an SA602AN to oscillate
Getting into RF design
getting pc board resist spray
Ghz Scopes?
Gilbert Cell mixers with good performance
Gilbert Cell output
Giving the Gilbert cell mixer a low input impedance
GNAT 1/40
Good Articles: Toroid impedance transformers
Good price on EMRFD*
Good Receiver or Transceiver to Build
Good Receiver or Transceiver to Build / ARRL
Good Receiver or Transceiver to Build (W1FB)
Good sources for parts?
GPLA for plotting group delay?
GPLA problems
Grayhill clips
Help Is there a Digi Copy Of this Great Book
Re Great Learning Site
ground loops on thick copper clad
Grounded Base Power amplifiers
Grounded gate amplifier impedance
Grounding coax cable
Grounding Rules?
Grounding the Shield of one or both ends of coax
Guanella Brown-Boveri Article
Guanella Brown-Boveri Article
Guanella paper
Guanella, Ruthroff et al
H mode mixer frequency limits
H-Mode Mixer as tested by PA3AKEuls
H-Mode Mixer as tested by PA3AKEuls
H mode mixer frequency limits
H-mode mixer questions
H-mode mixers, etc.
Hal-tronix Frequency Counter Schematic
Ham radio brainstorm
Ham to do SMT work
HamCalc
Hartley VFO capacitors
Has Martein's Web Page Gone for Good?
Have you considered cloning a 50s era receiver or transmitter?
HB Filter for 6 KHz
HC-49U vs. HC-49US XTALS for crystal filters?
HC49/US Crystal Parameters
headphones
Heathkit- resurrection?
Helical Filter?
helical resonator
Hello, and FLEA question
Help with non-performing Updated Universal QRP Transmitter
Help for an unknown component
Help IDing a Ham Radio Magazine DigiRatt PLL 2 PC board project
Help Is there a Digi Copy Of this Great Book
Wire-Wrap Wire and Toroids (was help my junk box)
Help needed - K3NHI sweep generator - pcb design
Help - off topic [Original 2SC3133]
Help!! Problems with a Cub Frequency Counter [Off topic]
Help to Identift Donor Parts? May be a bit OT
Help with a VHF broadband amplifier and filters?
Help with hybrid cascode if amp
Help with VHF band pass filter?
HF Low distortion sinewave Signal Generator kit
HF noise sources
HF PA finals - tradeoffs
HF Radio Systems & Circuits Book - WARNING
High intercept MMIC
High Isolation Feedback Amplifiers
High Isolation RF Preamp
2009 presentation on high-level mixers
High Level RF Mixing
High Output on Weber Tribander Clone
High pass Filter
high q smd capacitors
high resistance inductor
high resistance inductor - doing it wrong
high resistance inductor -got it right
High Speed Class E Drivers for Paralleled BS170
High value Chip Capacitors for Bypass and Filtering
High voltage capacitors
High Voltage Probe
High Voltage Transmitters
Hole punching in Hammond shield Boxes
HOME BREW PISTON CAPACITOR
Home Made news
pcb for sale , for qrp experiments or homebrew , newly design RF - DEAD BUG UGLY STYLE PCB's..
Homebrew boxes and shielding
homebrew sig gen
How's My Audio?
How Do You Attack Audio Amp Motorboating?
How does a DC receiver sound?
How far do you go with circuit simulations before soldering?
How Much L.O. Power Is Needed - OXNER APP NOTE
How Much L.O. Power Is Needed - OXNER APP NOTE
How Receivers Sound (FT-817 experiences)
How Receivers Sound (FT-817 experiences)
How to approach EMRFD?
how to determine proper bias for a MOSFET power amp
How to measure input/output impedance of any IF filter?
How to purify the LO 's harmonics and sub-harmonics?
How to store parts?
How to store parts? Addendum
HP 1743A Scope Schematic
HP 8601A sweeper/generator
Hp 8640 Generator
HP 8640B
HP8640B Manual
HP8640B technical manual downloads
Thanks for HR article !
HTML messages
HuffPuff circuit to control a crystal oscillator
Hybrid (90 deg module type)'s Formula?
Hybrid Cascode AGC
Hybrid Cascode Amplifier Kitlets, EOL
Hybrid Cascode Amplifier Re-Kitting
Hybrid Cascode GP AGC IF Amp vs HP AGC/IF Subsystem
Hybrid Cascode IF amplifier
Hybrid Cascode IF Amp / Article reprint available
Hybrid Cascode IF amplifier
Hybrid Cascode IF Amplifier input network questions
Hybrid Cascode IF for 5mHz
Hybrid Cascode Noise Analysis?
Hybrid Cascode PCB & Kitlet offering
Hybrid (Filter + Phasing) Transceivers
hybrid twisted pair following the switching mixer
Hycas Minor Instability Observed
HYCAS behaving strange
Hycas behaviour
HYCAS Board Different than Schematic D4 ?
Hycas-Cascode amp
Hycas IF/455KHz
HYCAS IF/AGC Advice
Hycas IF amp & crystal frequencies
HYCAS IF amp for 50KHz IF
HYCAS in a receiver
Hycas Minor Instability Observed
hycas - resonant circuit
I.F. amplifier (AGC)
I need a new generator
I need help with this
I need L-C filter suggestions
I new a generator
I Q vfo
i read that am radios are mostly junk
I0CG new AD9912 1GHz DDS
I2C clock noise getting into RF circuits
IC-765 Total Gain Pot R414
IC Audio amps vs Discrete
IC Audio Amps. Was EMRFD Fig 1.17 Audio amp
ic unobtanium
ICM OX Modules - Invformation available on line?
ID Codes on SMT Components
Identifying BJT leads w/ an ohmmeter
Crystal Filters - IF module
ills of DC receivers
IMD in ceramic capacitors
IMD intercepts for JFETs
imd of unequal levels
impedance matching in audio circuit
Impedance question fig 6.56
Impedance transformer question
impluse noise blanker?
Improvement changes to Elecraft K2 and K1 transceivers
impulse response, graceful or ???
In Praise of 'Ugly' Construction
Inductive reactance of a Current Balun?
Inductor Q in LTSpice
Inductors as components of dipole elements questions
Inductors components of dipole elements questions
Inexpensive Homebrew Hot Air Pencil for SMD work
Innovation
Input Capacitance of Large MOSFETs
Input on free or inexpensive eda
Input/Output Impedance of Crystal Filter
Input/Output tuned amplifier
INRAD WILL ADD TMP CONNECTORS KITS TO THEIR PRODUCTS LIST
Instruments for sale
Interesting articles in Microwave & RF April 2008 issue
Interesting filter construction
Interesting TRF Rx
Interfacing Spectrum Analyzer to PC
Interference Cancelling Using Correlation Feedback
Internal Meter Resistance
International Crystal
Interview with W1HFA (do you know him?)
Introduction and advice calibrating the chapter 7 wattmeter
Introduction & EMFD Power Meter question
Introduction and advice calibrating the chapter 7 wattmeter
Introduction to Radio Frequency Design by Wes Hayward Arrived
Investigating a Norton feedback amplifier for battery operation
IP3 Simulation with Spice
IP3 specs , mixer specs
IQ-VFO front end (was H-mode mixers, etc.,)
¿Anyone has the "tech not es" article of Allan Victor?
¿Anyone has the "tech notes" art.icle of Allan Victor?
IRF510 heatsink insulator
IRF510 : how high?
IRF510 Successor?
Is a diode DBM naturally 50 ohms?
is phase noise additive?
is there an advanage to using solder with rosin flux or water soluble flux
Is This A Method to Achieve Proper Crystal Filter Terminations?
ITT Filter - myVNA matching tool.
ITU-R P.372-8 expected ambient noise level recommendation and "good enough" noise figure
J310 lead frame heatsinking question
J310 Source and Drain Swap
J310 Source and Drain Swap -- Other FETs?
JAN Crystals
January 2015 QST "Hybrid HF Transmitter" Using a 455 kHz IF
JBOT - Just a bunch of transistors as a linear amp.
JEDEC/EECA/JIS Cross Reference
JH5ESM and diode switches
JPL Amplifier (was: New file uploaded to emrfd)
July-August 2012 QEX Article
June 2001 QST Power Meter
K and Q Values for filters
K2 design impressions
K3NHI calibrator for AD8307 power meter
K3NHI Sweep System build notes + more in 1 zip file
K5IRK/W7ZOI Receiver
K7HFD high-level low-phase-noise VFO
K7HFD oscillator simulations and real-life tank measurements
Automatic power off, started out as KA7EXM microWattmeter
KA7EXM Power Meter Reality Check
KA7EXM Power Meter Reality Check
Kanga at FDIM
Kanga Spectrum Analyzer kit found but...
Kanga US
Kanga US at Dayton - new products and book special
KENWOOD TS-990 HAS INTEGRATED THE H-MODE MIXER AS 1ST MIXER
KISS Mixer PCB Artwork
KISS Mixer Performance
KISS mixer with 2N7000
KK7B kits
KK7B MicroR2 problem
KK7P DSPx daughter card
KM5H?
KST data plotting for filter sweeps
KW Diplexer and QSE boards
LA3PNA all pass board
LA5523 Motor Driver IC
Lab notebooks ?
Ladder Filter Construction
ladder filter question
LADPAC
LADPAC 2008
[EMRFD] Ladpac coils.exe
LADPAC installation trouble
ladpac2002
Lambda diode and Transmitting Loop antennas
Laser EME, at 600mbps!
Late FDIM Awards and Hall of Fame Announcement
LC antenna tuner coil question
LC circuit and current
LC circuit 2
LC Filter Construction Techniques
LCR Meter (Steber LMS)
LCR Meter (Steber LMS)
Lead inductance vs. package style
Leader DMM/2 'Scope Model 300: Printer cable??
Learning the emrfd and Thge Art of electronics way
LED's for sale
Leeson equation: Q
Less than stellar publishing quality
lettering
LF spurs using Sortabalun as PA output transformer
Linear amplifier. Low output on 12m and 10m. Need advice.
Linear-tuning VFO's
Linearization of Varactor Tuned VFO
Link coupled output question REF Solid State Design page 25
Link-Coupled Tuner
Link Coupling
Listening to receivers again: HW-16 this time
LM-386 Bypass Question.
LM386 noise
Building R2 -- Replacement for LM387?
LO drive
LO for DC RCVR & DSB XMTR
LO signal quality for Active JFET Mixers
Load Angle and Phase Delay in CMCD and Class E Amplifiers
Loaded Q and the amount of negative resistance
Local oscillators for a high level mixer
Lodestone Former Group Purchase for CDG2000 and Star BPFs
Lodestone Former Group Purchase for CDG2000, Star or other BPF
Lodestone Formers Group Purchase
Lodestone Formers Group Purchase for Star and CDG2000 Builders
Looking for a datasheet..
Looking for advice (and may WTB) -- coax crimp tools, connectors
Looking for advice (and may WTB) -- coax crimp tools, connectors, cables -- tooling up for winter projects!!
Looking for ham doing SMT as service
Looking for help with PIXIE mixer stage
Looking for information about "EZ 40 RCVR"
looking for old HR article on linear tuning
Looking for parts help
Looking for PIC Power CPU for UK Ham
Looking for transistors
Feed through capacitors source (Was: Looking for W7ZOI/K7TAU Spectrum Analyzer kit)
looking under the bonnet of IC-7300
Looks like they're BAAACK... again. ;-)
AW: Losses in Diplexer?
lost the emrfd cd
Low cost, software defined, spectrum analyzer?
Low cost test equipment
Reflow soldering QFN, was: Low IMD driver IC
low-loss extreme impedance matching
low loss high Q front end for vhf
Low Noise 41 MHz Oscillator
Low Noise Amps for Tayloe Integrating Detector
Low-noise audio amps
low output IRF510
Low-Pass Impedance Transformer
low power audio amp breadcrumbs
low power audio amp breadcrumbs
Low Power ssb/cw transmitter 1978.
Low voltage power amp
Low voltage transmitters
LPF BPF
LPF vs BPF for homebrew transceiver design
Quadrature LO from 2x clock input: LT5517
LT5517 I&Q demodulator specs'
LT5517 mixer
LTSPICE model for RD100HHF1
LTSpice and ELR audio amp circuit help needed.
LTSpice IV and filter design for R2/T2 Pro project
LTSPICE model for RD100HHF1
MaCom Reborn!!! WAS: Diode Equivalent
Magnet wire for sale
magnetic lines of force
Making a SoftRock V6 and similar Multiband HF SDR RX
Making Ceramic Coil Forms
Manipulating complex numbers
MAR-1
Matched amplifiers for BITX
Matching Crystal Filter Input & Output
matching for RF amps
Matching Mixer Diodes
Matching networks for RF Power Amplifiers
Matching Transformer With Dual Outputs
Math Mystery in EMRFD Appendix Article
Math tools for electronics
Maybe a little OT -- my new microwave project
MC1349P v.s. MC1350P gain control inearity
VS: MC1350 Cookbook?
MC1496
MC1496G Gilbert Cell Mixers
MC3356 question
McMaster Carr Order Blocked
MDS
Mea Culpa for "Another trimmer number"
Measured output impedance of 74AHC74 vs 74AHC04
Si570 VFO for 210X (was Measured output impedance of various inverters)
Measurement Receiver
Measurement Receiver Sensitivity
Measurements of k and M for transformers
Measurements on double balanced mixers
Measurements On Ferrite Materials
Measuring coax loss
Measuring coax loss by Larry Jannings
Measuring Crystal Parameters
Measuring extremely small value inductors
measuring IMD
Measuring inductance
Measuring noise figure (was Investigating a Norton feedback amplifier...)
Measuring noise in front-end pre-amps and mixers
measuring oscillator noise
measuring oscillator noise - Could you?
Measuring output return loss at low powers
Measuring Phase Noise?
Measuring power supply noise.
Measuring wideband twisted wire transformers
Mesmerising About Mixers
message digest received
Method of Science - A Wiki entry
micro R1 receiver with RA3AAE mixer // CAPACITIVE COUPLING
micro R1 receiver with RA3AAE mixer // CAPACITIVE COUPLING
micro R1 receiver with RA3AAE mixer // CAPACITIVE COUPLING
micro R1 receiver with RA3AAE mixer // CAPACITIVE COUPLING
Micro R2 Op amp stages
Microcontroller clock frequency
micrometal's powdered iron toroids
Micrometals Toroid type 26 uses
Microphonic mixer chips?
Microprocessor noise in receiver IF
microR2 gain
Microstrip Impedance question
Microstrip to board edge desgin rule
microT2 documentation
Mini Circuits XFRM TC1-1-13MG2+
Minicircuits ADE-1 Question
Minicircuits Bulk Buy
MiniCircuits POS Series VCO
Minimal SWR Indicator
minimum parts transceivers presentation available
Missing Digests
missing documents
Missing posts
Missing Value in EMRFD Schematic
MIT OpenCourseWare
MIT Rad lab journals
Mitsubishi RD New Series Mosfet RF Power Transistors
mix differences between Amidon and Micrometals iron powder toroids
Mixed form bandpass filter with different impedances
Mixer Confusion
Recommendations for mixer diodes
Mixer front end question
Si5351A output level vs power into 50 ohms and mixer levels
Mixer Musings and the KISS Mixer (revised)
Mixer Musings and the KISS Mixer (revised)
Mixer Purity, JFET+SA602+JFET
Mixer Purity, JFET+SA602+JFET
Mixer terminating diplexer tuning
The Black Art of DBM Mixer Termination
AW: Mixer Termination w/Balanced Amp
LO signal quality for Active JFET Mixers
X-Mode Mixer (was: mixers: strong signal immunity)
Mizer front end question
MMIC's (Reasonably long)
MMIC PC Board mounting
Moderation and delayed posts
Modifying Hycas-IF-Amp board for dual-gate MOSFETs
Modular Direct Conversion Receiver--Help Neede
More DTC data - ref. post 8183
More Northern Lights
More on crystal Qu Measurement
More on LC bandpass filter measurements
More Polyvaricon cap stuff.
More sensitive receiver archtiecture
Scope probes in high current circuits (was More thoughts on gate drive)
More X-Pad photos with BF998
Morse Code Keyer
MOSFET PA Bias Stabilization Circuit
mosfet wide band amps
MOSQUITO, a QRPn SDR MOSFET TRANSCEIVER
motor driven tuners, etc
Motorola Application Notes
Motorola Microphone cartridge
Motorola MRF-261 transistor questions
Mounting old variable capacitors et al
Mounting Toroids
MRF140 or Substitute
MS-DDS-60 Controller
multi-hole ferrite transformers
Multiband DC Receivers
Multiband DC Receivers - Thanks
Multiband LO chain final incarnation
Multifiliar to the max: 11-filiar!
Multiple output power splitter
Multiplier chains and filters and transmitted fundamentals
musings about Chris' Mixer Musings
Musings on S-Meter readings
My AADE DFD4 Frequency Counter
My apologies...
My breadboard Butler oscillator.
my ebook on building a receiver
My Illness
My JBOT hates antennas
My Oscilloscope Okay?
My Power Meter
My progress on Spectrum Analyzer
mystery of filters
nano vacum tubes?
NBFM
NE567 Tone Decoder for Receiver Filter
NE602--Antenna analyzer
NE602 - Calculating input bandpass filter
NE602 Conversion Gain Experiment
NE602 - end of production in DIP8
NE602 Failure
Neat board available
Need a MMIC
re Need a power standad
Need A varactor
Need advice for interfacing an ADC
need crystal filter info
Need help identifying this semi-rigid UT141-type coax
Need Some Toroid Advice
Needed signal source
Negative Resistance Preamplifier
NEScaf modification for notch filter
nescaf notch filter
NEW 0LD TOOL FAVORITE
New 80m micro-transceivers on my QRP website
New Book
Fwd: New copy of EMRFD
New Double Tuned Filter Measurements
New EMRFD related projects
New file uploaded to emrfd
New file uploaded to emrfd - Sig Gen
New Filter Chips
New Kit at Kanga US
New kit: ProgRock, triple programmable GPS-disciplined crystal replacement
New NorCal S1-S9 Signal Generator Report
New Prototype Boards on Order
New Protype boards
New QEX arrived in the mail today
New RF transistor for QRP PA
New Screen Layout
New softward for EMRFD readers.
New software for EMRFD readers.
New to Forum
New to group - current activity
Beta / Transconductance (was new with questions)
New Yahoogroups UI - Attn. Listowner
Newbie Question - help with amplifier basics, please.
Newbie Question - help with amplifier basics, please.
Newbie question on RF relays, attenuators and substrates
NJM2594 Gilbert cell double balanced modulator/demodulator
Noiscom NC302L noise diode for sale
noise: 6AL5 versus semiconductor diodes
Noise Blanker circuits
noise figure for small signal rf amp: bf998 mosfet versus IF140 jfet
Noise figure measurement
Noise Figure Measurement without a Spectrum Analyzer
Noise generator
Noise Generator Diodes (corrected phone number)
non-diode-bridge mixers
Nonlinearity = important in oscillators
noob questions on building a tiny tornado
Northern Lights
Norton feedback power amplifier?
NOT EMRFD - AD9912 SFDR measurements
[Not EMRFD] Cheap source for RF connectors
NOT EMRFD - ITALY NOW OPERATING ON 70 MHz
NOT EMRFD - PA3AKE High Dynamic Range Front End
Not getting Messages
NPO capacitors
NPO Capacitors, Lowest Microphonics in DC RX?
NPR testing
nxp_rf_manual_11th_edition available
O.T. Tak40
Observations of oscillator output waveforms - some with mucho distortion
Off Topic: Ancient FT-243 Xtal Circuits?
VNA's -- Off Topic-Antenna end effect/capacative hat
Off Topic: March 1993 QEX Article Needed
OFFTOPIC, HF battery desulphate
Ohm Meter Calibration
Old QST
old step attenuator
Old Toko 10.7Mhz IF transformers
old Tripplet 2432 sig gen
Oldbooks
Older files purged?
On-Semi ending TO-92 production (Was: TO-92 J310 FETS Now Obsolete)
On the Air
On the concept of absolute correctness...
Only 21 days til the 18th FDIM
OOPS!!!! MRF492 Substitute
Op-Amp space constraints
Op amps and crossover distortion with RC loads
Op-Amps in EMRFD
VS: OPA860 as a mixer?
Opto Circuit
Optoisolator Question
origin of Pretty good and the minimim gain superhet
Original "R2" receiver board
Oscillator issue
Oscillator-multiplier tube rigs - Was: AGC audio chain
oscillator stability, VFO-BFO stability?
Oscillator topology Questions
ot : about rigol 1052E
OT: ARRL Circuit Simulation and Analysis
OT: Bob Pease Dies in One-Car Accident
OT: Books FS: Antenna and SPICE Texts
OT: Crystals go to war
OT - Dayton and 'Four Days In May'
OT?: EDN Design Ideas
OT: FDIM 2009 - Online Registration Closing Soon
OT - free caps
OT/FS - 4.5 tpi 2 conductor #18
OT: Good hands-on RF grad schools?
OT: Lead Acid battery regen anecdote - ACdelco
OT: Power supply switching frequencies
OT: ramsey closing down. remaining kits on amazon
OT: Sun has fewest sunspots since 1913, better GPS
OT-Switching ceramic filter+additional stage
OT: Trying to repair Bendix/King KX155
OT: VNA - any recommendations?
Output Impedance Of Si570 (CMOS Version)
Output transformer for push-pull MOSFET final RF amp
Output transformer for single ended PA
Re Overtone crystals
Ozarkcon QRP Conference in April
PA Circuit Enclosed in Altoids Tin ?
PA, IXTU12N06T order problem
PA3AKE Holy Grail RCVR
Packing components
Panel meters for sale
Parallax propeller as RF source
paralleling RF output transistors
Part similar to MC1350
Part values (was Capacitor value in Regenerative Receiver)
Parts Free to a Good Home *Update*
Passing the torch - or making sure it's well settled, even
Patents and ham radio
PCB board softwares, services
PCB conversion?
PCB for JBOT?
pcb for sale , for qrp experiments or homebrew , newly design RF - DEAD BUG UGLY STYLE PCB's..
PCBs for Steve Hageman's HighZ FET probe
Peak-reading meters
Peaking Coils
Phase detection circuit to measure frequency....
Phase / Gain Adjustments in a Phasing DCR
Phase Modulating A Carrier
is phase noise additive?
phase noise and mixer measurements by nick.
Phase Noise measurements on BITX VFO and other oscillators
Phase Noise Measurements..agn
Phase Noise measurements on BITX VFO and other oscillators
Phase Noise of Frequency Dividers
Phase shift oscillator
Phasing exciter all-pass circuits - 10 pF across feedback resistor
phasing exciter anomalies
phasing exciter for transmitter
Article translation (was: Video of simple SSB phasing receiver)
phasing RX all-pole filter design
Photographing/documenting dead-bug construction
PIC Micro Code
Pic power meter for 630m band use?
Picastar
Picture of Manhattan PCB Now Downloaded
piezoelectric resonator / crystals
Pin Diode Help
PIN diode T/R switch
PIN Diodes
Gapping an Impedance Transformer to adjust AL
PISTON CAPACITOR FOLLOWUP
Piston trimmer question
Pixe assembly problem
Playing around with RF receive amps
Please ban this spammer !
PLL Will Not Lock
PMOS keyclick-removing PA switch
PNP Switch
Polyakov Mixers
Pondering over spectrum analyzers
Poor man spectrum analyzer
Popcorn DC receiver
POS-200 question
Posting etiquette
posting text
Potentometers
Powdered iron toroid loss question
Announcing - the FDIM2018 2N2222 POWER CHALLENGE!
Low voltage power amp
Power Amp Design
Power attenuator, which side is which?
Power calculations
Power Meter Application Example
Power MOSFET gate drive
Power MOSFET protection diode (Source DRain).
Power Ratios
power supply filtering
Power Supply Heatsink Temperature
Power Taps & Converting RMS Volts to Watts
Power Taps & Converting RMS Volts to Watts
Powerful data plotting program KST demo upload
Powering a Active Whip Antenna with 6 volts
Powering a Performance Receiver with 5 Volts
Powering a Performance Receiver with 5 Volts - and an Active Whip Antenna
Practical Circuit Analysis
precision parts
Precision Ref Freq.
Pretty good Superhet as a test receiver
Probing RF with a 'scope
problem with IRF510 push-pull PA
Problems with Digital Freq Readout
Problems with power meter.
Prog Rcvr xtal osc cct.
Programmable Attenuator
programmable rf attenuator chips?
Progressive Receiver oscillator
Proper dress of male SMA on RG316 coax
Proposed new digital mode
ProtoBoard and PCB Construction package
Prototyping SMT Boards
Publication Ends
Purifying Mixers
push pull amplifier output questiion
push pull amplifier output questiion
Push-pull output magnetics styling
Q killing coatings
Q MULTIPLIER QUESTION
Q Multiplier Revisited
Q of capacitors, SMD et al
Q, Q meters and old HP Info (second posting)
Q, Q meters and old HP Info (second posting)
Q, Q meters and polyvaricon Q
Q - suggestions for putting in a stock of toroid cores
QEX back issue
QEX free for shipping
QEX Jul/Aug (was DC-compensated notch filter)
Copper Plate for QRO FET
QRP ARCI New Publication
QRP Categories
QRP-L Digest, Vol 101, Issue 36
QRP Labs VFO/SigGen now has quadrature output mode
QRP order 3 Chebychev bandpass filter
QRP Quarterly Accessible to Visually Impaired
QRP2004 transceiver design online
QRPedia
QRPs
QSK and high power amplifier
emrfd] QST SA 110MHz bandpass filter nearly complete but I have a few questions
QST Spectrum Analyzer Trick or Treat
QST Surface Mount Article
Quad MOSFET array
Quadrature hybrid
Quadrature Signal Splitters
Twisted wire quadrature splitter, driving differentially (0+180 degrees).
Source for quartz crystals
Query re : Changes to how you access Yahoo Groups
Question about 4CCX2550B'sX250Rs
Question about 4CX250Rs
Question about a potentiometer...with a tap....
Question about Capacitors in Phase Circuits
Question about RF amp ICs and MMICs
question about some cable
Question About T2 Transmitter (Correction)
Question About T2 Transmitter (Correction)
Question about the book
Question about Toroid Winding Protocol
Question about W1FB AGC design
Question; can the LD MOS Fet PD85004 be used for a HF PA amplfier ?
Superhet LO (was Question grounded gate amplifier for receiver)
Question on digital version of allpass filters
Question on how to use NE602
Question on hybrid connected crystal filters
Question on page 3.18 Figure 3.31 crystal filter.
Question on Shorted Turns
Question RE EMRFD Fig. 9.82 - 10 pF across feedback resistors
Question Regarding The X-Môde Diode Mixer
Question: What SMT Transistor for Post-Mixer Amp
questions about a DDS spectrum
Questions about an SDR PSK-31 rig for a balloon beacon
Questions Strange Local Oscillator Wave Forms
Quiet Regulators
R.E +60 dBm IP3 - forgot to mention, 12 volt system
r.e smd post mixer transistor
R: IRF510 : how high?
R2 audio amp question
r2 etc
R2 PRo boards
R2 pro on 2m
Rail Splitters & Headphone Amplifiers
Ratios in Bels
RD16HHF1 FET amp
RD70HHF1 amplifier schematic
Re[2]: UR3IQO and the Chris' KISS mixer
Re[4]: UR3IQO and the Chris' KISS mixer
[RE]: 74G74 replacement for 74S74
RE An Improved RF Generator Gain Blocks
Re Bill Kelsey Kanga USA
Re Equations
Re Great Learning Site
re KISS mixer ??
re measuring phase noisee
re Need a power standad
re query etc Yahoo Groups
Re, Question; can the LD MOS Fet PD85004 be used for a HF PA
RE the HP8640B
Re; Tunnel Diodes
re Yahoo Groups
Receiver gain pot question
Receiver noise figure for the top band and below
Receiver planning-filling in the blanks
Receiver Project Choice: Superhet or DC?
Recommendations for a headphone amplifier
Recommendations for mixer diodes
Recommended IF bandwidth for CW (Cohn) Crystal Filter
Recommended reading for practical FM receiver design
reconditioning previously used PC boards
Reducing line voltage for old tube gear
Reference: Hartley oscillator inductance based on 2 .not-coupled coils
Reflow soldering QFN, was: Low IMD driver IC
Regarding "Trends in Discrete Semiconductors"
Regarding EMRFD group settings
Regarding Memberships and Spam postings
Regarding The Problem Of Impedance
Regen 101 question
A not-so-simple regenerative receiver challenge (Was: Regen musings)
Regen Receiver 1.6
Ten Tec 1253 Regen (was Regens etc.)
Relay Maintenance
Relay switching of band filters
Repeater front-end
Replacement for 2SC5739 ?
Replacement for AADE Inductance Meter
requesting for support in constructing a 20 m/14mhz band 10 .to 25 watts CLASS - E linear amplifier.
requesting information on feeding balanced antenna with a L matc
requesting information on feeding balanced antenna with a L match atu
requesting support in building a all discreet 27.00MHz CB ssb transceiver
RES: RES: Toroid FT37-77
RES: RES: Toroid FT37-77
Resistive bridge
Resistor Type
Resistors in small quantities THANK YOU
retrieving submerged components and rigs
Return loss bridge
Return-Loss Bridge Operation
Return Loss Bridges
Reverse engineering a BPF?
Reverse Polarity Protection -- VK3EM Solution -- "Transorb"
Reverse Polarity Protection -- VK3EM Solution -- "Transorb"
Review: Multisim, Analog Devices Ed. (Free)
EMRFD Revised First Edition - 8.5, RF Low-Noise Amplifier
RF Analog Variable Time Delay Solutions
RF bridge and VNA
RF chokes
RF current transformer
RF Design Procedures Step by Step?
RF Interconnects
RF isolation amplifier
RF linear sweep generator kit for sale
RF measurements guidelines
rf parts for sale
RF Parts Parts for sale
rf power measurement?
RF Power Meter
RF power switching circuits question
RF signal generator
RF Sweep generator and other test Equip.
RF Transformers
RF voltage detector design?
RFSim99 won't install under Windows 7...
RG-11 Center Conductor?
RG174 coax stripper
RIAA equalization (was KK7B kits)
Ribbon cable stripping and connectors
RLC_Meter Prototype Boards
Rock bending
rocket's heat shield and the plasma form a series bandpass filter on re-entry
Rotary Encoder interface for serial / lpt port
Roy RX
RTX switch trouble
Rubidium atomic clock
RX Switch
s-match atu
S Meter for the Hybird Cascode IF Amp
S7C Simple Superhet
SA-612 Impedance Questions
SA Narrow Crystal Filter?
SA vs VNA
SA602 Max recommended oscillator input?
SA602 Max recommended oscillator input? 2v PP
SA602 Oscillator Question??
sa612 circuit
SA612 pin 6 input impedance
SA612 spice model
SBL-1 mexer
Scale the Cascode AGC Board to 455?
schematic drawing software
Free old 15 MHz Scope, Phoenix Pickup only
scope (DSO 2250)
Scope probes in high current circuits (was More thoughts on gate drive)
scope test
scope trouble.
Scoring PCBs to be broken apart
Scotty spectrum analyser group buy
Scratch removing
SDR (was BP Boards)
SE Labs Oscilloscope EM 102
Searching for a book
Seco 500 crystalignmeter
Seeking Low Voltage Broadband Amplifier for VHF/UHF Operation
Seeking Receiver Diagnostic Techniques
self-protecting multimeter
Self-resonant frequency of toroid inductors
Semiconductor Industry
Semiconductor Industry / more upheaval
Semiconductors, etc.
Sensitive AM Detector
Series & parallel mode crystal oscillators
Series capacitance G3UUR Test Oscillator
Series resonant color burst crystals
Series tuned Clapp VFO questions
Setup File
Sheet metal techniques for radio cabinets
Shielded enclosure effectiveness
Shielded inductors
shielding a toroid: HELP WES
shielding a toroid: HELP WES
Shielding Data Connections In RF Modules
Shielding in SSB Xmtrs
SI-570?
Si5351A: facts and myths
Si5351 VFO/BFO
Si5351A: facts and myths
Si5351A output drive waveform and observations
Si5351A output level vs power into 50 ohms and mixer levels
Roelof's measurement of Si570 vs Si5531A (was Si5351A: facts and myths)
Si570 thoughts, part I
Si570 VFO for 210X (was Measured output impedance of various inverters)
Si570 VFO for 210X (was Measured output impedance of various inverters)
SI570 vs Si5351 Controversy
SI570s
Siglent DSG 1025 as RF generator
Signal Generator as a Local Oscillator?
Signal Generator, was: How to approach EMRFD?
Signal Hound
Signal leve reed relay question
Signal to Noise Calculation of a Receiver Cascade
Siliconix Application Notes
Silver 'plating'
silver ink pen to draw circuit boards
Simple and low cost GPS controlled oscillator
Simple bandpass filters
Simple BPF for DC Receiver
SIMPLE HB CABLE HOLDER
Simple local-oscillator for diode mixer - comments?
Simple PIN diode attenuator
Simple Projects
Simple Superhet
simpler FET final More thoughts on gate drive
Simpson meters for sale
How far do you go with circuit simulations before soldering?
Simulation vs reality (was Common Gate Amplifiers -- Long Post)
Simultaneous T and R output VFO
Single or double sided PCB ?
Single-signal DC rx without AF phase shift
Single-signal regenerative receiver
Single Stage Norton Amp.
Single supply op-amps
Single-transistor nulling Q multiplier - how?
Sizing of WV of capacitors for an LPF
Sleeping Bag Radio for sale
Slightly OT: Theremin (was HELP)
SM5BSZ measurements on diode switching IMD and HD
Small chokes and xformers for sale
Small SMD trimmer capacitors with moderate temperature coefficients?
SMD feed through caps
SMD inductor BPF for receiver
SMD jig
Smooth audio T/R switching
Smooth audio T/R switching and Hybrid Cascade IF and S meter cct.
SMT component exchange mailing list
SMT Low Pass Filter
SMT np0 capacitors
Softward Bug
software files
Software for the Novice Crystal Filter Designer
Solder for sale
Solder Wick
Solder Wick - availability? cost?
Soldering fine pitch SMD
Soldering Fine Pitch SMD - Sorry but this is long.
Soldering iron
Soldering SMD, was: Collecting and Storing SMD Parts
Soldering station
SolderSmoke Book Available with a Discount Today
SolderSmoke interview with Ashhar Farhan
SolderSmoke Podcast 176: Terminaiton Insensitivity, Sideband Inversion, Dongle Modification, and Other Knack-related conditions
SolderSmoke Podcast 185 Antennas in February!
SolderSmoke Podcast #186 is available (and it is a lot of fun)
Crumbling 'Solid State Design for the Radio Amateur'
Solid state design, etc
Crumbling 'Solid State Design for the Radio Amateur'
Solid State Design for the Radio Amateur on eBay
Some advice on used HP instrument.
Some basic questions
SOME DIODE RING MIXER EXPERIENCES
SOME OBSERVATIONS ON TOROIDAL TRANSFORMERS
Some Thoughts on Phase Delay Networks for DC Receivers
Somewhat OT: Paypal Dysfunction
Sound Card Noise specs
Source Coupled JFET - Oscillator
Source for crystals
Source for quartz crystals
Source for Regen Receiver Parts
Source for si570?
source for Si570 LVDS
Sources of wire for coils
Sourcing Variable Capacitors and Reduction Drives
[SPAM] AD9912 DDS clock source – just a thought?
***SPAM*** Questions about an SDR PSK-31 rig for a balloon beacon
*****SPAM***** Tunnel diodes?
Spatial Multiplexing ....(SM or SMX)....question.
Speaking of Audio Cabling
Speaking of esoteric mixers
Specan - A reboot of the W7ZOI/K7TAU spectrum analyzer
Specan - questions
Special Book Offer
Special Pricing on books at Dayton/FDIM - Final offer!
Specialized AM/FM BCB Rx design...OT?
Spectrum Analyser (SA) IF Freq Change
spectrum analyser software
My progress on Spectrum Analyzer
Kanga Spectrum Analyzer and Tracking Generator Available
Spectrum Analyzer Assistance Please
Spectrum Analyzer BPF
Spectrum Analyzer IF frequency
Spectrum Analyzer - Tracking Osc. Mod.
Spectrum Analyzer - Tracking Osc. Mod.
Spectrum Analyzer Waveform Question.
Spectrumanalyzer 3356chip
Spice and PSpice
Spice model with realistic stray inductances for MOSFET PA
SPICE simulation of an oscillator - getting it to start.
SPICE (was DDS module with buffer / amp)
Split ring diode mixer reduced loss?
Split-Ring Mixer PDF and Signal Hound
Split-Ring Mixer (was: high level mixers)
Spur-Free Synthesizers
Squarer circuit for power indication
Squarer for Class E
Squeeze More Performance Out of Toroidal Inductors...
SSB bandwidth and intelligibility
SSB Generation - Opinions Please
ssb out of the raspberry pi
SSB QRP transmitter
SSB signal distortion in homwbrew receiver
star topology in radios
State-of_the-art in RF clipping
State-of-the-Art Op Amps Require A Sense of Humor
Static control pad for sale
STEFAN, LZ1OV, SK – 1ST ANNIVERSARY
Step Attenuator Project
Stereo Microscope for SMD Work
Steve Weber Butterfly DDS VFO
Still waiting for how to calculate the output impedance of the SP-1 transmitter.
Storing small parts
Strange, annoying power supply problem
Stray capacitance in oscillator circuit for IC-based DC receiver.
Stupid filter question
Substituting for a 2N2222?
Substitution for 7400?
Substitution of MRF586 In High IP3 Front End
subway construction
Success: Clean, Simple Local Oscillator
Suggestions to K7ZOI & other excellent providers of amateur designs & kits
Super J-Pole @ 126 MHz
SUPER TUNABLE TRAP
Super VXO?
Superhet design questions
Superhet LO (was Question grounded gate amplifier for receiver)
supersonic mic?
Supply decouple resistor
Surface mount R2
Surfce mount J310s and Replacement of U310 with J310
Surplus KVG crystal filters
Survival of Ancient ICs
SV: Discrete component version of Gilbert Cell Mixer
SV: NE602 - Calculating input bandpass filter
SV: SV: Toroid impedance transformers
SV: SV: Toroid impedance transformers
Sweep frequency generator
Sweep generator general question
sweeperino
Switched Mode Power Supplies
switching mixers and bpf ip3
Switching Questions
Switching Time of Phased Lock Loop
SWL - SSB of DSB
SWR Protection
SWR Question
T/R Switch For QRP Separates
T/R switching with straight keys with NO and NC contacts?
T2 Audio response not flat
T2 Phasing Network capacitors
Tapping a tank?
Tayloe detector with diodes
Tayloe Mixer Difficulties
Tayloe Mixer Difficulties
TCA 440
TDA1013B
tektronix 465M vs Rigol
Ten Tec 1253 Regen (was Regens etc.)
Terminating impedance of the Yaesu XF-455k-262-01 filter
Terminating impedance of the Yaesu XF-455k-262-01 filter
Termination Insensitive Amp (TIA)
Low cost test equipment
Test Message
Test VCXO schematics
Testing receiver front end filters
AW: Testing Xtal Ladder Filter Impedance
Tests with the SDR receiver
Share a scope or electronics story, get a thank you gift
LTSPICE model for RD100HHF1 - Thanks
Thanks for HR article !
Thanks KU4AF
The ARRL Challenge--SSB Vs DSB
The Black Art of DBM Mixer Termination
The changing look of the EMRFD group
the flea, a 40m minimalist transceiver
The Homebrew Challenge
The importance Q in a matching network
the kiss mixer, some more questions
The Measurement Receiver in the Power Meter Article
The Mighty Midget Revisited
The Minima transceiver
The most noiseless opamp available
the pain of va3iul
The PLL of the Raspberry Pi
The Problem of the 'T2 Pro' Output Stage
The Simple Scalar Network Analyzer (LONG)
The Solder Wick Chronicles, Part 1: The Iron, the Bench, and the Scope Probe
Theory/modeling of regenerative detectors (long)
Theory/modeling of regenerative detectors (long)
Thin Film SMD Resistors (*not* April 1)
Thin Film SMD Resistors (*not* April 1)
those signals on 433.92 MHZ
Thoughts on 15M Transceiver?
TO-92 J310 FETS Now Obsolete
To change the subject, a different question
to cool device
TOKO Coils
Toko Inductors? Lodestone Pacific Formers
Toroid cores for Balun
RES: RES: Toroid FT37-77
Toroid identification
Toroid impedance transformers
Toroid inductors - Al values vs inductance charts
Toroid kit for sale
Toroid link coil placing question
Toroid Mixtures for VFOs
Toroid Power Rating
Toroid transformer flux/watt limits?
toroid winding with large dia. wire
Toroid Windings and Inductance values
micrometal's powdered iron toroids
Toroids in Mixers (Tongue in Cheek.Sort Of)--Ferrite Core Experiments
Toroids: Phase, Sense & Direction
Torroid question for L-C tuner
Trade Beldin 1671 for RG-188
Transceivers you have built
Transconductance Equation Question
Transformer data
Transformer For Norton Amplifier
transformer phase coupling question
Transformer Slow Start Circuit (More Information)
Transformer Slow Start Circuit (More Information)
Transformers for H-mode mixers: a question
Transformers wound on 6 Hole Beads
transistor amplifier
Transistor substitute
Transistors for JBOT Amp
TRansmission lines in Radio Designer
Transmitter efficiency
Transmitter Stage Matching
trifilar wound smd transformers
Trouble with EMRFD amplifier
Trouble with Fig 4.11
Troubleshooting
Trying to ID simple dual band vhf/uhf antenna article
Trying to Improve Receiver IP3
tubes I don't need
TUF-1H MIXER
TUF-3
TUF-3 supplier?
TUF1 and TUF2 Mixers
Tuneable 10.7MHz notch filter
Tunnel Diodes?
[RE] Twisted Pair Transformers with resonator
Twisted wire quadrature splitter, driving differentially (0+180 degrees).
two-element antenna tuners
two new tools.
two new tools for the amateur radio designer
two questions on HF transformers
TWO TONE GENERATOR
uc734b datasheet ?
UHF Power Meter Detector Diodes
UHF SDR beta kit status
UHF-SDR Transceiver
UHFSDR Assembly Manual
UHFSDR Hittite replacements
UHFSDR Opto couper
ultra-linear power amplifiers
Ultra-spherical lpf - results on a network analyser
Ultra-spherical lpf - sums don't seem to work out
Ultraspherical filters
UM2104C PIN DIODE
Unbuffered vs buffered CMOS inverters, with a twist
Underground wire detector
Understanding Amateur Radio
Understanding and basic design of linear power chains.
Understanding Mixer Diodes
Understanding the IP3 specification and linearity, part II
Unity Gain Bandwidth
Universal QRP transmitter changes question
Help for an unknown component
Help for an unknown component
Up-conversion
Re[4]: UR3IQO and the Chris' KISS mixer
Urgent: Yahoo Group Category Issues with EMRFD
USB Oscilloscope
USB spectrum analyzer
Use of power iron core and power question -- W1FB's Info Flux Density
Using 1/2 Tayloe detector with downconversion/image rejection in software
Using 74HC04 as VFO
Using a DDS as a PLL reference
Using a diode ring DBM as an 50dB range current controlled attenuator
Using EMRFD with other RF Design Books
Using Feedthru capacitors?
using ladbuild for notch filters
using WWV 10MHz
uV signal measurements
UVFO question
Vackar Crystal Oscillator (long)
Vackar Crystal Oscillator (long)
Variable caps in the uk?
Variable gain in linear amplification
Varicap control of 602/386 DC Receiver
VCA810 RF derived AGC?
VCO question
VCXO problems
Vector Network Analyzer
Vector voltmeter useage
vectron TCXO use
Very Low Profile IC Sockets
Very Maximum Sideband Keying - really?
ICM OX Modules - Invformation available on line?
VFO adjustments
vfo and splitter
VFO construction technique stability observations
VFO drift on power up
VFO drift on power up
VFO level for SA612 Mixer
VFO Options
VFO Options Now : BITX project comments
VFO output level
VFO PCB
VFO Spot Frequenncy Error
vfo stability
VFO toroid phase splitter
VHF and UHF gear for sale
VHF Dipole Feedpoint Impedance Match Options @126.0 MHz
VHF direction finding
VHF/FM broadcast question
VHF Impedance tuner.
vhf power chain
Article translation (was: Video of simple SSB phasing receiver)
View distortion in LTSpice?
Villard Cage Antenna was Ferrite properties
Villard Cage usage
VK5TM DDS Xtal Sub
VNA's -- Off Topic-Antenna end effect/capacative hat
VNA elmering needed
VNAView still available
Voice Power Spectrum Density
Voltage regulator Ci and Co capacitors what kind??
Voltage regulator noise = phase noise
VS: MC1350 Cookbook?
VS: OPA860 as a mixer?
VS: Resistive bridge
VXO with 74HCT74 divider circuit
VXOs - pulling crystals up
W&G PS-19
W1FB's rigs in ARRL museum
W2NSD SK
W7ZOI 14Mhz receiver
W7ZOI's wattmeter
W7ZOI & W7PUA Wattmeter Calibration
W7ZOI Crystal Oscillator question
W7ZOI/K7TAU spectrum analyzer saga continues
W7ZOI/K7TAU spectrum analyzer saga continues
W7ZOI Spectrum Analyzer Question - 70Mhz LPF
W7ZOI Spectrum Analyzer - 100 mhz Crystal
W7ZOI Spectrum Analyzer Question - 70Mhz LPF
W7ZOI Spectrum Analyzer Question/Problem - SOLVED
W7ZOI Spectrum Analyzer Question/Problem - SOLVED
w7zoi Spectrum Analyzer specific questions
W7ZOI/W7PUA Wattmeter current
WA2EBY IRF510 MOSFET Amp
WA7EXM Power Meter
Wanted: 1750 kHz crystals and / or crystal filter
WANTED MC145152 Freq synthesizer Chips
Wanted to buy: one microR2 PC board (with contact info...)
Wanted to buy: one microR2 PC board (with contact info...)
war skies and dipoles
Was(unknown)--K5IRK/W7ZOI Receiver
WAV file signal generator software
WBR Regen antenna coupling
wes' booklet on setting up a home lab
What's better than a TIP31?
What are you going to build before XMAS?
what cad pcb and schematic do you use ?
What Does Tayloe Detector Output Look Like On a Scope?
What have I found?
What if all through hole went obsolete ??
What if all throuhg hole went obsolete ??
What is a Mini Circuits T2-6T ?
What to use to sweep the 100 mhz Specan filter.
When is a junkbox semiconductor too old to use?
Which capacitor technology to use?
Which probes for frequency counter?
Why do we match mixer diodes?
wide range double tuned circuit
Wide range oscillator
Wide VCO for SA
Wideband RF phase shift circuit
Will EMRFD Data Library Remain Available?
Will the Real SWR Please Stand Up?
Winding a Balun Core for use with a diode ring mixer
winding binocular cores
Wire Wrap Wire for Toroid Transformers
wire rating for RF
Wire-Wrap Wire and Toroids (was help my junk box)
Wire Wrap Wire for Toroid Transformers
WLW's 500,000 Watt Transmitter
WN5Y Super Blue LED Mixer
Wobulator?
Would one of these car starters work as a QRP supply?
WTB Autek VA-1
WTB: VCXO
WWV 10 MHz Receiver
X-Môde Mixer
X-Mode Mixer
X-Mode Mixer (was: mixers: strong signal immunity)
X Pad Pictures
X-Pads
XF-9S42, 43, 44 crystal filters
Xmit Mixer questions
xtal filter tuning
Xtal Frequency Shifting (your own xtal frequency)
XTALs for filter
yahoo breach
Yahoo Group Issues, Corrected (for now)
yahoo groups picture
Yahoo Syrup
Zener protected final stage
Zout of a 2N4401 tuned RF amp