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#1
07-11-2014, 09:35 AM
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For amplifiers I recommend a GaAsFet one from
http://www.advancedreceiver.com/page12.html and get one tuned to your worst case channel. The noise figure of these is 0.5 dB!! They also make broadband ones but the noise figure is 2.5dB. That can make a difference. These do need a separate wire for the DC feed and a weatherproof box. Their overload capacity is stupendous. As for antennas ... I was trying to get a channel 44 which is 68 miles away over a tiny hill. What worked best was a home-made cut to channel 24 element Yagi, scaled from a design found in a 1977 ARRL handbook, make 100% out of copper tubing soldered together. This was at a height or only 20 feet. Such antennas are 6 channels wide. I added an extra reflector behind it cut to channel 19 and that made it work fine for local channels 17-23 (of course at low gain, the reflector just removes the back response). 
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#2
07-11-2014, 01:09 PM
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Odd looking UHF Antenna
Here is an odd looking old UHF antenna that I got at the Early Television Convention in 2013. I use it with my big screen 50 inch plasma, and it works better than rabbit ears. Just had to use a matching transformer for the 300 ohm to the 75 ohm coax connector. It just sits on top of my Technics turntable, and brings in good hi-def picture.
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#3
07-11-2014, 03:52 PM
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Quote:
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#4
07-11-2014, 06:02 PM
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DavGoodlin; That is quite a interesting group of antennas you found. I'm looking
forward to more on this, and thanks for posting it all....
__________________
Yes you can call me "Squirrel boy"
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#5
11-02-2015, 03:15 PM
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To continue with more from Jerrold, attached is a "showroom sample" Zenith antenna, circa 1979. This was used to sell its unique features up close.
The bowtie has a Z cut into it. The X-director element(s) is a classic Jerrold design as well. Notice the notches in the director element so it can be shortened and optimized for high UHF channels. This antenna seemed to be in production for only a few years, after which only Channel Master and Winegard survived the late 70s. IMG_7217.jpg
__________________
"When resistors increase in value, they're worthless" -Dave G Last edited by DavGoodlin; 11-02-2015 at 03:46 PM. Reason: add pic
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#6
02-01-2016, 03:28 PM
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Antennas I have photographed
TV Antennas have held an interest for me, since I was a small child, I have always "looked up" whenever possible, to see antennas in different areas. I find I still look for them, when I'm out and about, especially walking from my truck to the home, at Estate Sales. When I see one I like, and I'm safely able to (I.E. not driving
 , I will snap a picture with my cell phone! Here are a few I have taken, in the last several months. The antennas not on towers, are in the Suburban Detroit Metro area, where I live, and the fringe area tower units, are in outlying areas, some near mid-Michigan.
__________________
[B]"Bee care-eh-full to don't broke thee pic-sher tee-yube!" :-)
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#7
02-02-2016, 08:39 AM
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Dave
The first is a classic Radio shack (Antennacraft-made) design, now used by Channel Master since CM limited their line significantly. The second is fairly new. The third pic is an old VHF setup for channels in opposite directions so a rotor is not needed. The fourth one is very interesting, a stacked folded dipole with multi-element reflector array. I have seen those but the camera was not handy. The fifth picture seems to show a Zenith on the left, on the right is the good old CM crossfire VHF topped with CM's version of the 4-bay bowtie. Looking through some JFD literature, I noted that the longer elements were not only 1/4 wavelength for low band VHF but were at 3/4 wavelength for high band also. That is how the stacked conical antennas functioned on high band with no short elements. Thanks!
__________________
"When resistors increase in value, they're worthless" -Dave G Last edited by DavGoodlin; 02-02-2016 at 08:51 AM.
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#9
02-02-2016, 07:13 PM
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Quote:
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#10
02-02-2016, 07:52 PM
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Picture #4 is an early 50s Channel Master 2 stack "Champion", which was available in single bay, double and quadruple stacked versions. Each bay consisted of 2 high band folded dipoles and a low band dipole, backed by 5 reflector elements. If you happen to have a Jan '54 Radio Electronics (15GP22 screen shot on cover) it is pictured on page 22 CM ad.
jr
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#11
02-02-2016, 09:03 PM
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Possible could be a radio antenna, Tom, I suspect its TV, though, It looks newer, if it was original to the house they would have lined up up with the power outlet 6 inches away from it., has a 50's or 60s style wall plate, 2 slots, almost the same size as a 2 prong power socket, but set vertically in the middle of the plate. Its a bit odd, doesn't match other antenna outlets I've seen.
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#12
02-10-2016, 10:06 PM
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Quote:
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#14
02-20-2016, 10:22 PM
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Quote:
http://www.radioshackcatalogs.com/html/1974/h083.html .
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#15
08-04-2019, 12:47 PM
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Quote:
I was playing around with it in 2005-06 trying to recieve analog UHF, this was my millionth attempt at having UHF at home. I could get a few stations one really clear a few miles away at a roadside lookout with a pocket tv, but I never did pick anything up at home. To many mountains and trees where I live and they completely kill UHF signals. God I sure miss analog....
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