[Elecraft] [K3] Detuning Antenna Per Band and QSK

[Tom Boucher]

Brian, 
I think Jim is more concerned about his beverages losing their directional properties due to re-radiation of received signals from his transmit antenna. I don’t think there is a simple way of doing this and it’s probably best to abandon QSK operation when using the beverages and use a relay, operated by the K3 PTT output, which open circuits the base of the inverted ‘L’.

73,
Tom G3OLB

<<Another way to do what you want might be to switch some attenuation into the receive path during transmit. I assume you are using the RX antenna port for the beverages. The switching could be done with pin diodes with the timing tuned to allow QSK. 

Hope this helps. 

Brian, K0DTJ >>