I can try 10 meter to determine if the TX/RX relay continue its troublesome ways.? The gentle adjustment with a ball peen hammer on the TX/RX relay will be the last step in the?trouble shooting?process.
Thanks for your thoughts.? I will try 10 meters tomorrow.
-----Original Message-----
From: Curt via groups.io <wb8yyy@...>
To: [email protected]
Sent: Thu, May 14, 2020 8:55 pm
Subject: Re: [BITX20] Sticking TX/RX Relay UBITX V 6
Ed
I suggest trying different bands and antennas, if you have more than one, before blaming the relay. Another possibility is RF feedback into the raduino. If indeed you have a stuck relay, as I did once, gently tap on it. Mine was cured, so far okay.
If you study the board, you can see which relays belong to the low pass filters, then the TR relay will stand out.