My next door neighbor put up one of those preamplified antennas and TVI was a
problem immediately due to close proximity to my vertical. Adding a good
old-fashioned 30 MHz LPF (Bencher) cured this particular case. Maybe worth a
try but I bet it's overloading on the fundamental rather than harmonics. A HPF
before the preamp could fix it, but that's likely impossible to do that since
the thing is an integrated package. A choke on the feedline is probably your
only hope; follows Jim’s guidelines and place it close to the TV antenna. Or
move the TV antenna as far away from your Yagi as possible.
-Gary NA6O
> Dish satellite TV is having a conflict with CBS and has dropped
> (supposedly temporary) CBS Channel 8 here in San Diego.
> I put up an Over The Air receiving antenna to get the station back.
>
> It is:
> https://www.amazon.com/gp/product/B071V7SV6P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
>
> <https://www.amazon.com/gp/product/B071V7SV6P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1>
>
> It work fairly well. It is at about 25 feet and is below my DB-18
> SteppIr at 60 feet.
> I just noticed today that when I keyed my transmitter on 15 and higher
> frequencies, the picture dropped out and I get a "No Signal" indication
> on the TV.
>
> Pretty sure the ham RF is overloading the antenna amp.
> Would toroids on the TV feed-line help, work on the amp or just live
> with it?
> --
>
> Thanks,
> Mike
> NA6MB
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