Re: Quick Rooftop Antenna For Channel 2?


"Sal M. Onella" <salmonella@xxxxxxxxxxxxxxxxxx> wrote in message
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"Sal M. Onella" <salmonella@xxxxxxxxxxxxxxxxxx> wrote in message
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"JoeSch" <joeschultz1@xxxxxxxxx> wrote in message
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< snip >

Does anyone have any ideas for a quick rooftop antenna I can put on a
pole and run into my house for the Jets game? I really don't mind if
the signal is somewhat snowy as long as I can make out what is
happening on the field-beats radio. Besides, this is football-
sometimes it snows for real and nobody complains, lol.

< snip >

You need to make a basic yagi antenna. When finished, it greatly
resembles
a TV antenna, except the elements are all nearly the same size, optimized
for Channel 2. (


< snip >

I posted the instructions for a Channel 2 Yagi a few weeks ago. They were
acknowledged and I've been waiting anxiously for some feedback.

Curiosity got the better of me this afternoon, so I built the thing
myself -- exactly as described except for the second director, since I was
losing the light and three elements proved the point.

With just the folded dipole at ten feet, I got a recognizable KCBS picture
from 124 miles. Bad snow, noisy sound and no color. Joe, a dedicated
Jets
fan, would watch this picture but his girl friend would not.

When I added the reflector, the snow and the sound got better. When I put
it up to fifteen feet I had color. When I added the first director and
returned it to fifteen feet, the snow got a lot less and the picture was
quite watchable. The girl friend would say, "Gee, Honey, that's a pretty
good picture. Can we get free HBO, too?" (They never understand ...
never.)

I measured the signal with my old analog signal level meter and got
negative
16 dBmV, which looked about right. Another director should add only a dB
or
two. Maybe I will try a preamp and see what that does. Trouble is,
Channel
2 suffers from impulse noise (electrical appliances are usually the
cause).
Antenna would need to be elevated to reduce that problem.

WCBS has an insignificant 1 dB more power than KCBS but their antenna
height
is a lot less, which impacts Joe in Connecticut. However, his distance is
less, 100 miles vs. 124 miles.

"Sal"

A 3el 6m yagi would work very well, all you need is a 50 ohm to 75 ohm
adapter @ about 20 feet. Use a small TV rotator, and when your not watching
ch2 you can try calling CQ on 6m.


.

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