[amsat-bb] Baofeng Bf-f8

Paul Stoetzer n8hm at arrl.net
Tue Feb 28 13:34:56 UTC 2017

Since a bandpass filter on the receiver did not correct the problem,
the issue is likely the third harmonic from the transmitted signal. A
receive bandpass filter will naturally pass that third harmonic. What
you need is a low pass filter on the transmit radio. Any commercially
available diplexer will perform this function.


Paul, N8HM

On Tue, Feb 28, 2017 at 7:48 AM, Roy Dean <royldean at gmail.com> wrote:
> Phil,
> I started out last year using a BF-F8HP and UV-5R for full duplex
> operation, and sadly experienced desense every single time.   Tried the BF
> as both Tx and Rx radio, desense occured in both.  Even stuck band pass
> filters in the Rx radio feedline... no go.
> --Roy
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