[RFI] RFI into OTA TV antenna with amp

[AA5CT]

My advice FWIW - go passive on the antenna. I easily overloaded a 
Rad Shack preamp at the antenna with any RF whereas the 'passive'
antenna and subsequent TeeVees have all co-existed ..
de AA5CT Jim

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    On Monday, January 31, 2022, 11:50:16 PM GMT-6, Gary Johnson via RFI <rfi at contesting.com> wrote:  
 
 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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