RE: [TV_Antennas] Re: Stealth Hawk Anyone?


Dec 6, 2014

 


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#827 Dec 6, 2014

Hello all, I'm brand new here, and new to the DIY-antenna mania....Anyone played around with a Steath Hawk?I just threw one together... and it works, inside a mobile home (aluminum skinned)! I don't even know what kind of metal I used, or the gauge, it came off an old busted up unusable lampshade, certainly not cooper or aluminum, likely wrought iron, and difficult to bend. This is a variation of the Stealth Hawk 'Optimized for 14 to 69' and I added a 2" NAROD to each bottom leg for my area's higher-VHF. I have it hanging from the ceiling in the living room near the TV, and near a window. Haven't even played around with aiming it yet. Outside the window is the porch, with an aluminum overhang...so I have to have it low near the window -- too high the signal is going to be reflected away by that aluminum overhanging the porch. ��Here is my TVFool data, assuming only a 5-foot AGL elevation (inside and near that window) :��www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dd243364efe2a72

I've also considered mounting it outside, at 15 feet elevation (wouldn't be hard to do).Here's my question for anyone who has played w/ the SH design -- If I were to put together another, slightly smaller one, of the exact same dimensions, and mounted it inside the first one at 180 degree's to the first (so looking at it you would see something looking like the skeleton of the Apollo lunar-landers), would it work?... giving me multi-directionality? Would that improve the gain (so I don't have to mount it outside)?Or... that same idea... would a 7.5 or 8 inch diameter circular loop, also within the SH frame, at 180 degrees, ... would that work?thanks, mike









TV Fool Locate TV transmitters, choose antennas, look at coverage maps,...



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#828 Dec 6, 2014

On 12/6/2014 8:09 AM,mgwiz@... [TV_Antennas] wrote:

Hello all, I'm brand newhere, and new to the DIY-antenna mania....Anyone played around with a Steath Hawk?



Nope because it isn't directional for my fringe area

I just threw one together... and it works, inside amobile home (aluminum skinned)! I don't even know what kind ofmetal I used, or the gauge, it came off an old busted upunusable lampshade, certainly not cooper or aluminum, likelywrought iron, and difficult to bend. This is a variation ofthe Stealth Hawk 'Optimized for 14 to 69' and I added a 2"NAROD to each bottom leg for my area's higher-VHF. I have ithanging from the ceiling in the living room near the TV, andnear a window. Haven't even played around with aiming it yet.Outside the window is the porch, with an aluminumoverhang...so I have to have it low near the window -- toohigh the signal is going to be reflected away by that aluminumoverhanging the porch. .Here is my TVFool data, assuming onlya 5-foot AGL elevation (inside and near that window) :.www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dd243364efe2a72

I've also considered mounting it outside, at 15 feet elevation(wouldn't be hard to do).



Put it outside up above your roof.

Here's my question for anyone who has played w/ the SH design-- If I were to put together another, slightly smaller one, ofthe exact same dimensions, and mounted it inside the first oneat 180 degree's to the first (so looking at it you would seesomething looking like the skeleton of the Apollolunar-landers), would it work?... giving memulti-directionality? Would that improve the gain (so I don'thave to mount it outside)?Or... that same idea... would a 7.5 or 8 inch diameter circularloop, also wi thin the SH frame, at 180 degrees, ... would thatwork?thanks, mike





You want a directional antenna (yagi) to get gain. The stealth hawkisn't a directional antenna. It could be made directional but notthe way you describe. I don't know if a yagi is appropriate for yourarea. Your signals aren't that far away. You could do a tvfool atabout 15 or 20 feet and see how it compares to the one you shared.



-- All the Best & 73'sDale Miller, KC2CBDCookeville, TennesseeHam Operator since 1997 (Extra)

Registered Linux User: #317401Linux since June 2003Registered Ubuntu User #26423

stpatrick3spam@...stpatrick2spam@...stpatrick3spam@...bdchimneysweepspam@...

(cut the spam to reply)

__



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#829 Dec 6, 2014

Oh yeah, that will make a difference!:����TV Fool



�� from 5 feet to fifteen. And TVFool doesn't know that means going outside... It only knows the ten extra feet.��I don't want a directional antenna -- looking at my radar-plot you'll understand why -- I have a sprinkling of (inde and pbs) channels I would lose if I had a directional antenna 'seeing' NNE or SSW.��

I really don't want to put it up on the roof , and make myself lightening-bait, not if I can first optimize it further keeping it inside. I'm going to join the TVFool Forum and post this same Q there. Another for here : How much of a difference does the metal I'm using make?... Copper wire, vs copper tube, vs aluminum, vs wrought iron (this piece of old lampshade-ring is far too rigid, too hard to bend to be aluminum)?��



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#830 Dec 6, 2014

On 14-12-06 09:09 AM, mgwiz@... [TV_Antennas] wrote:

> I just threw one together... and it works, inside a mobile home

> (aluminum skinned)!



The engineer types call metal rooms a "Faraday Shield" (

en.wikipedia.org/wiki/Faraday_cage ) you probably are only

getting any signal through windows and plastic vents.





Suggest relocating to the outside of the aluminium box. Metal used to

make an antenna is not too much of an issue as long as the conductivity

is good and the structure if Physically strong enough to not be damaged

by wind and weather.



--

Charles MacDonald Stittsville Ontario

cmacd@... Just Beyond the Fringe

Charles.MacDonald.org/tubes

No Microsoft Products were used in sending this e-mail.







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#833 Dec 7, 2014

The stealth hawk looks like a modified half of a bi-quad. placing an antenna inside another usually de-tunes the other. A smaller version will receive higher frequencies. I tried a "double bi-quad" design with sides of 12.1cm which gave me great results and recieved hi-vhf which I was not expecting. It gives some gain, easy to make. I used 6 gauge copper and 300/75 ohm ballun. great for receiving front and back signals.

To: TV_Antennas@yahoogroups.comFrom: TV_Antennas@yahoogroups.comDate: Sat, 6 Dec 2014 06:09:17 -0800Subject: [TV_Antennas] Stealth Hawk Anyone?

��

Hello all, I'm brand new here, and new to the DIY-antenna mania....Anyone played around with a Steath Hawk?I just threw one together... and it works, inside a mobile home (aluminum skinned)! I don't even know what kind of metal I used, or the gauge, it came off an old busted up unusable lampshade, certainly not cooper or aluminum, likely wrought iron, and difficult to bend. This is a variation of the Stealth Hawk 'Optimized for 14 to 69' and I added a 2" NAROD to each bottom leg for my area's higher-VHF. I have it hanging from the ceiling in the living room near the TV, and near a window. Haven't even played around with aiming it yet. Outside the window is the porch, with an aluminum overhang...so I have to have it low near the window -- too high the signal is going to be reflected away by that aluminum overhanging the porch. ��Here is my TVFool data, assuming only a 5-foot AGL elevation (inside and near that window) :��www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dd243364efe2a72

I've also considered mounting it outside, at 15 feet elevation (wouldn't be hard to do).Here's my question for anyone who has played w/ the SH design -- If I were to put together another, slightly smaller one, of the exact same dimensions, and mounted it inside the first one at 180 degree's to the first (so looking at it you would see something looking like the skeleton of the Apollo lunar-landers), would it work?... giving me multi-directionality? Would that improve the gain (so I don't have to mount it outside)?Or... that same idea... would a 7.5 or 8 inch diameter circular loop, also within the SH frame, at 180 degrees, ... would that work?thanks, mike









TV Fool Locate TV transmitters, choose antennas, look at coverage maps,...



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#834 Dec 8, 2014

---In TV_Antennas@yahoogroups.com, estefan2020@...> wrote :



The stealth hawk looks like a modified half of a bi-quad. placing an antenna inside another usually de-tunes the other. A smaller version will receive higher frequencies. I tried a "double bi-quad" design with sides of 12.1cm which gave me great results and recieved hi-vhf which I was not expecting. It gives some gain, easy to make. I used 6 gauge copper and 300/75 ohm ballun. great for receiving front and back signals.

DOUBLE Bi-Quad?.... You mean like this :

Build Your Own Antenna: Double BiQuad sector antenna for 3.5 GHz / WiMAX / G4

and now with a reflector, right, if you picked up front-and-back signals?..... I've just got to get his one up above the roof-line. I"m delighted w/ what it and the Tv is picking up, and also sniffing ��a signal from, even inside an aluminum-skinned mobile home.

Build Your Own Antenna: Double BiQuad sector anten... IntroductionThis is basic instructions on building a double biquad antenna for 3.5 GHz frequency with approx. 14 dBi Gain. (13 dBi if without lips)



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#835 Dec 8, 2014

a reflector blocks signals from the back. but yea, in your case a reflector is not required, I made a biquad and double-biquad and used 1/2 cpvc as a backing so I can throw it in my truck, and use a 7inch digital tv on the go.

If i remember correctly I used 640MHZ which is in the middle of my real channels I get. I used the metric formula and found 12.1cm or 121mm ��will achieve that from each 90 degree bend to the next. The center has the 300/75 balun. I did not use a reflector, I wanted to catch front and back signals.



s148.photobucket.com/user/estefan2020/media/121cmsidesbiquadanddoubblebiquad.jpg.html?o=1



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#836 Dec 12, 2014

Oh yeah, I saw that pix already, doing a G-search for 'loop antennas'So that double-bi is multi-directional?... not jus front and back, but does it grab from 90 degrees to either side as well?I got mine up on ��the roof since Weds. Picking up all four network plus pbs channels from Orlando 38 to 43 miles away, and also fjust about 180 degrees the other way from Tampa 48 to 52 miles. Plus a couple more indie's and pbs. And guess what?... it's not even 13 feet above ground level! So i'm very happy.��I'll upload a couple pictures when I get the chance



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#837 Dec 16, 2014

a doubble biquad is a directional antenna, it lowers direction from the sides left/right and extends the front/ back reception. If you place a reflector behind it, the forward direction gets a little longer. This is not an omni directional, the ability to capture signal from all 360 deg.

You could try to create an omni with gain��electronics-diy.com/electronic_schematic.php?id=1093��this would need to be recalculated for 620MHZ instead of the 440MHZ and supported.



i148.photobucket.com/albums/s18/estefan2020/ky-jelly.jpgKY4JLY (not 4 toast) 73.



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#838 Dec 21, 2014

Hey Dan et al :So here's what I came up with. I have a cluster of Orlando area channels at roughly 52 - 53 degrees, at forty-ish miles. Also a cluster of Tampa-area channels at just about the reciprocal heading (235 - 238), at roughly 50 miles. The Hawk at 12 1/2 above gound level (and at least 2 1/2 feet above the roofline) was pulling in all four network affiliates from both Orl and Tpa markets and the pbs channels and a few independents. Aimed roughly 52 - 53-ish degees, dead-reconing (I don't have ��a compass). However, 'aimed' that way, even though it was outside and above the roofline, I was losing what is my strongest channel, the ION affiliate from Melbourne (at roughly 110 degrees and 30 ish miles). And I like some of the ION law-enforcement shows.��Here is the Stealth Hawk (vers 1) optimized for 14-69 which I tried my best to get the angles and lengths as perfect as possible with.... I did add one 2 " Narod to each lower leg for the higher VHF channels.��

nikiml's Antenna pages - Stealth Hawk optimized for ch. 14-69

nikiml's Antenna pages - Stealth Hawk optimized for ch. 14-69 Stealth Hawk Optimized antenna model for UHF 14-69 Digital and Analog TV/HDTV reception







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#839 Dec 21, 2014

i356.photobucket.com/albums/oo10/splitzcreen/Stealth%20Hawk%202/HAWK2CLOSEUP2_zps3cd3c739.jpg

if you have access to a tablet or smart phone, you can get compass app will give numbers of degrees usually within 2 deg accuracy.

It looks like a wire inside the antenna, and at 90Deg rotated inside the antenna, try removing it for better results. may be de-tuning the antenna.

on tvfool.com does it state ION ��los, edge1, or edge2 ?

try another 5 feet up, I had to use 3 (5 foot) antenna masts at menards to get acceptable results. At about 20ft you may need guy wires.

i148.photobucket.com/albums/s18/estefan2020/ky-jelly.jpgKY4JLY (not 4 toast) 73.



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#840 Dec 21, 2014

If you like you can download 4nec2 antenna modeling software for free. Most forums about diy antennas will list a text with numbers and commas, just cut and paste in a word editor, write ect, and save. load with 4nec2 and watch a 3d antenna, ��change its length, and graph the frequency and observe its change.��

www.qsl.net/4nec2/



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#841 Dec 21, 2014

Dan :��No, you misunderstood, maybe you read it too quickly. That ION affiliate��channel 48/56��is blasting away at 1,000 KW power at only 30 miles away.��It's the one at the very top of my TVFool list.��It's strong enough I could pick it up with the coax cable end alone without even being connected to any antenna. . But with the antenna vers 1 aimed at roughly 52-53 degrees it was pulling in all the Orl channels to the NE, and all the Tpa channels to the SW... but failing (during clear evenings) to capture and hold that ION to the SE.��That second diamond-wire I added in the vers 2 build is at about 60 degrees to the first one. That's not hurting / de-tuning. Now, with that second wire added, the tv tuner is capturing and holding that channel 48/56 ION affiliate, also a pbs way up in Daytona/New Symrna Bch, and another indie from way over in St Pete.��Now i've looked as what else there is to try pulling in on that TVFool list -- there isn't much else to warrant much additional work or cost : There is a Spanish channel, and that other ION affiliate, the one which you noticed. There is one more indie over in Clearwater and another in Venice, but before I begin more work or spending money I'll go online and look at their program schedule. lf they're programming what I have already, no need for extra work, right?��



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#842 Dec 22, 2014

I'm not familiar with the diamond designs. But, its possible, and if you are adventurous, to modify the antenna to pick up a station from the side. A pair of foot long wires can be attached to the diamond. One wire attached to one side, at the point, pointed out, the other wire on the opposite point, pointed in .. This MAY allow reception of the ION station, and MAY not affect other reception.�� If this fails, there will be no loss, and other measures might be attempted.



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