I've considered getting Mini-Circuits high and low pass filters to go between my handhelds and my Arrow antenna. But the datasheets for the ones that I looked at only rate the filters at 0.5W. I'd be pushing about 5 W through them. Does anyone here have experience doing that to these filters and can comment on whether that works or not? Are there Mini-circuits filters that will handle 5 W comfortably? Steve AI9IN ----- Original Message ----- From: Jerry via AMSAT-BB (amsat-bb@amsat.org) Date: 05/24/20 14:45 To: Andy Brian (briaandy@gmail.com) Cc: amsat-bb (amsat-bb@amsat.org) Subject: Re: [amsat-bb] RS-44 VU noise from TX
Hoi,
Instead of putting a diplexer as filter( best is to use 1 per band), if you have the possibilty to make stuff your own, just 'split' a diplexer by making an LPF (low pass filter) at the 2m antenne and a HPF ( high pass filter) at the 70cm antenne. Or find some to buy (MINI CIRCUITS maybe?). This way you have a filter at both antennas. Mostly a diplexer is used only on one antenna, while the other diplexer port is closed with a small dummy load. Keep in mind the tx-pwr!
Best 73's
Jerry,ON4CJQ