RTL-SDR.com brand of FM trap - RF power limit?

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tustinfarm
Posts: 6
Joined: Wed Jan 29, 2020 12:18 am

RTL-SDR.com brand of FM trap - RF power limit?

Post by tustinfarm » Tue May 26, 2020 10:10 pm

The RTL-SDR.com brand of FM trap does an excellent job of cleaning things up when there's a FM broadcast tower nearby. It even helps me receive signals with a cheap handheld VHF transceiver (5W) that is susceptible to out of band overload.

However, transmitting through a filter like this is a dicey proposition - does anyone know what the power limit might be for sending RF at say 146 MHz through the filter? Before I risk frying the filter I decided it would be worth it to post a query here.

alanzfq
Posts: 140
Joined: Thu Oct 04, 2018 11:18 am

Re: RTL-SDR.com brand of FM trap - RF power limit?

Post by alanzfq » Wed May 27, 2020 8:01 am

You could look at the filter description!
It says some have said 5W with no damage but it's your risk.
Alan

rtlsdrblog
Site Admin
Posts: 2738
Joined: Mon Nov 19, 2012 11:54 pm

Re: RTL-SDR.com brand of FM trap - RF power limit?

Post by rtlsdrblog » Fri May 29, 2020 5:41 am

The filter is designed only for RX, we put no design into making it work for TX. That said, a number of users now have reported that it works fine at 5W.

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