Super Stealth Hawk & SSH II 3D Antennas - Canadian TV, Computing and Home Theatre Forums

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post #1 of 417 (permalink) Old 2011-09-03, 05:01 PM Thread Starter
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Cool Super Stealth Hawk & SSH II 3D Antennas

OK! Now that the transition is over with,...... I'M BORED!
Quote:
______________________________________
Buzz Lightyear's often quoted catchphrase:

"To infinity ... and beyond!"
_______________________________________
It's time to start working on the UHF/VHF 'Super-Hawk' [the next generation]

Vertical Stacked SH--> one up + one down, but where to put the balun feed points?

Option A] Center fed with a 4" gap at the 4:1 balun feed point .
Option B] Upper & lower fed using 2" feed gaps and phase lines with the 4:1 balun at the center point of the phase lines?

Feed gap[s]:
Option A] 4" gap at center feed
Option B] 2" feed gaps using phase lines

Element leg spacing & heights will remain the same as the SH#289 design.

Leg lengths from top to bottom of the individual left element & right element:
15", 6.5", 8.5", 8.5", 6.5", 15"

All bends are approx. 85° bends

The four [top/bottom/left/right] 15" legs stick outward at approx 45°

I'm going to run a hard-test mock-up version first to see if it even works, then I'll post a sketch for the DHC's NEC gurus.

It probably will become more directional than omni/multi-directional.

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #2 of 417 (permalink) Old 2011-09-03, 10:30 PM Thread Starter
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Cool Super Hawk (two Stealth Hawk#289 antennas combined)

Built this new improved antenna to defy all that media rubbish about
"rabbit-ears won't work anymore"

Well, I certainly didn't feel like messing around with just the rabbits ears, so rather than waste anymore effort disputing the rabbit-ear theory , I have used the theory of the Stealth Hawk design and built myself the world's first DTV-Rabbit antenna and it works just awsome.


So,... here's the debut of the GH&SH_hybrid VHF/UHF antenna!



Note: Each side is made of one continuous 60" strip of #10 galvanized merchant wire.

http://imageshack.us/photo/my-images/853/superhawk.png/

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #3 of 417 (permalink) Old 2011-09-04, 01:18 PM
 
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By "rabbit ears", do you mean you use that thing indoors? What kind of range do you get with it?
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post #4 of 417 (permalink) Old 2011-09-04, 02:04 PM Thread Starter
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No, it's an outdoor or attic size that is a bit of a hybrid of the Hoverman&Stealth antennas.

I stated that I "didn't feel like messing around with just the rabbits ears", so I built the whole damn bunny,.. it was a 'pun' related to media's recent 'rabbit ears are obsolete' misinformative reporting

No, it's not rabbit ears
Quote:
So,... here's the debut of the GH&SH_hybrid VHF/UHF antenna!
I said, "the world's first DTV-Rabbit antenna" because in real life, it looks like a rabbit with ears, a head, a belly and the bottom legs

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #5 of 417 (permalink) Old 2011-09-04, 02:15 PM
 
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Hi Ota Canuck,

Did you add a reflector to it? and if yes what kind mesh or tubes etc?

Can you also give some info on the stations that you are able to get (especially VHF-hi) and their distance?

This looks interesting and I might build one as well.

cheers
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post #6 of 417 (permalink) Old 2011-09-04, 02:46 PM Thread Starter
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obe67,

I just built these Super Hawk#473 elements yesterday afternoon to do an initial trial-test run to check out if my theory of combining two Stealth Hawk#289 antennas would work.

Yes it is doing very well on both VHF & UHF reception.

The single-bay Stealth Hawk and the classic Stealth Hawk designs of the past did not work with reflectors, but I suspect that this 2bay design just might be workable with a reflector. My goal is to build an antenna that is multi-lobed, multi-directional with a wide enough beam-width to eliminate the need for a rotor, therefore the use of reflectors were not in my planned testing.

I currently have it mounted on my shop at 20ft and I get much stronger overall reception than I did with the single-bay Stealth Hawk antenna. This thing still seems to have quite a wide beam-width, with the signal strengths coming in stronger, though I expect that this antenna will prove to be more bi-directional than multi-directional. If someone models this design, with/without reflectors, we'd probably find some need for additional frequency tuning and SWR optimization.

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #7 of 417 (permalink) Old 2011-09-04, 03:17 PM Thread Starter
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Apparently, the Super-Hawk name is used for a CB antenna.
http://www.signalengineering.com/superhawk.html

Seeing that this 2bay SH resembles a bunny rabbit, maybe we should have a 'name the rabbit antenna' contest

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #8 of 417 (permalink) Old 2011-09-04, 05:59 PM
 
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I am interested in the new design. Please can someone mock it up and post the nec file to see it all. Been looking at what new design I want to try (either the GH6n3 or this design for fun).

Thanks for all your efforts ota you are awesome!
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post #9 of 417 (permalink) Old 2011-09-04, 08:33 PM
 
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ota_canuck's antenna sort-of looks like this:

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post #10 of 417 (permalink) Old 2011-09-04, 08:45 PM
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Yep, thats the old Radio Shack Hoverman.

But it looks like you got a newer style variation of it than the one here:
http://www.digitalhome.ca/ota/superantenna/

Sumguy99, do you have that antenna ? If so, can you post the dimensions ?

My builds/plans (not the latest models) are located here.
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post #11 of 417 (permalink) Old 2011-09-04, 08:58 PM Thread Starter
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That Radio Shack antenna is for UHF only!

This is a combo of the basic GH antenna & the SH antenna resulting in a hybrid multi-band VHF-HI/UHF spectrum antenna.
Quote:
So,... here's the debut of the GH&SH_hybrid VHF/UHF antenna!
Yeah, it's similar to that Hoverman element design, but with the Stealth Hawk #289 leg & bend-angle dimensions. The result is this Super Stealth UHF & VHF antenna with a very wide beam-width found during initial real-life test performance.

The SH design criteria is:
UHF channels 14-51,
VHF channels 7-13,
Very wide-beam bi-directional or, multi-directional, or omni-directional.

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #12 of 417 (permalink) Old 2011-09-04, 09:10 PM
 
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What beamwidth did you find with your new Super Hawk? How does this compare to the GH and/or M4?
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post #13 of 417 (permalink) Old 2011-09-04, 10:11 PM
 
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Yup, I have that antenna. I re-discovered it in my basement a few weeks ago, and then when I saw the diagram of the antenna in this thread I thought - wait a minute, I've seen that before - and I unfolded it and took that picture. Do you want me to measure it? It's never been used. It still has the tag on the lead connector screw.
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post #14 of 417 (permalink) Old 2011-09-04, 10:20 PM Thread Starter
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Quote:
Originally Posted by IDRick View Post
What beamwidth did you find with your new Super Hawk? How does this compare to the GH and/or M4?
I don't know what the beam-width configuration is. This antenna has not been modeled yet.

I have done many antenna tests at my location GH,M4,4221,HBU33, etc,.. and the SH289 outperformed them all in my area. I need a very wide beam-width to cover the scattered broadcast market. The GH,M4, etc are not comparable because they are too directional compared to the SH antennas.


Super Stealth antenna vs the SH289 antenna:

From the real-tests I've done so far, I would quess that this 2bay design has very similar multi-lobe characteristics as the single bay SH antenna design, but the signal strengths are a bit stronger. It appears to be full range for VHF-Hi & UHF

3D SSH III with ZZ4 refl. http://imageshack.us/user/jmsdigital
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post #15 of 417 (permalink) Old 2011-09-04, 10:47 PM
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Quote:
Please can someone mock it up and post the nec file to see it all.
Here ya go.

Code:
CM ota canucks super hawk 1
CM see http://www.digitalhome.ca/forum/showthread.php?t=144918  post count 1
CM AGT = 1.0 (.02dB) at 585 mhz, Auto Segmentation = 21
CE
GW	100	9	0	-1.5	0	0	1.5	0	0.0285341
GW	103	25	0	1.5	10.7	0	6.66355138	3.94813	0.05094856
GW	104	19	0	1.5	0	0	6.66355138	3.94813	0.05094856
GW	105	19	0	1.5	0	0	6.66355086	-3.9481315	0.05094856
GW	106	25	0	1.5	-10.7	0	6.66355086	-3.9481315	0.05094856
GW	107	43	0	1.5	10.7	0	12.2229	21.1891	0.05094856
GW	108	43	0	1.5	-10.7	0	12.222907	-21.189007	0.05094856
GW	109	25	0	-1.5	10.7	0	-6.6635512	3.94812992	0.05094856
GW	110	19	0	-1.5	-1.093e-15	0	-6.6635512	3.94812992	0.05094856
GW	111	19	0	-1.5	-1.093e-15	0	-6.6635508	-3.9481315	0.05094856
GW	112	25	0	-1.5	-10.7	0	-6.6635508	-3.9481315	0.05094856
GW	113	43	0	-1.5	10.7	0	-12.2229	21.1891	0.05094856
GW	114	43	0	-1.5	-10.7	0	-12.222907	-21.189007	0.05094856
GS	0	0	0.0254		' All in in.
GE	0
EK
LD	5	0	0	0	59000000
EX	0	100	5	0	1	0
GN	-1
FR	0	1	0	0	800	0




IIRC gain pattern is almost identical to the old style RS Hoverman here, with the gain dip at about the same place : http://www.digitalhome.ca/ota/superantenna/

The pattern is a standard figure 8 pattern, except where the gain goes below 4 and then it becomes multi-lobed. So in that aspect, youre no better off than a single SH 289.

My builds/plans (not the latest models) are located here.
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