[amsat-bb] Antenna switching between 2 radios

[Zach Metzinger]

On 11/11/20 08:16, Chris Thompson via AMSAT-BB wrote:
> The MFJ box looks nice, but you can do this with just an RF relay if you
> have one in the junk box.  Maybe you have one lying around from an
> amplifier project that never quite got finished..  You could switch it with
> 12V and a toggle switch.  I switch between an SDR and my 2m transmitter
> when FalconSat needs to be sent a packet.  The TNC keys a sequencer which
> then switches everything over including the antenna.  So the 2m antenna is
> only connected to the 2m radio when it sends a packet.  The rest of the
> time it is connected to an SDR monitoring telemetry.

Also, one doesn't necessarily need a "RF" relay, if the band is 1.25m or 
longer:

https://www.w6pql.com/using_inexpensive_relays.htm

If you do want a "RF" relay, I use the Axicom HF3 relays in my 70cm LNA. 
They will handle 50 watts and seem to work well.

--- Zach
N0ZGO