Now that we are 'sort of in post contest season mode' and sharing some good ideas, there is another question:
During recent Field-day setups I noticed severe cross-talk issues between TX antennas and the separate RX antenna circuits. For sure any TX/R relay circuitry offers roughly 50-65 dB dampening. So, during a contest with >S9+30 signals received on the large TX antennas (Deltaloop for 40m and 80m) these would still show up S1 - S4 on the FD station's K3 RX input. At home I normally de-tune my backyard TX antenna(switch to GND during RX) to avoid noise pickup at the RX antennas, so I never noticed this. Question 1: how do you manage the TX-RX cross-talk at your setup? - switch TX antenna to GND during RX - switch-in en external attenuator, so the cross-talk is below noise level, but you are still able to use the TX antenna during RX - any other solution? Question 2: is there any other basic circuitry or setup in a basic contest station which offer possible similar negative side effects? 73, Mark PA5MW _________________ Topband Reflector Archives - http://www.contesting.com/_topband
