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TWO HOLER CW RIG 06 Jul 2021 00:01 #1

  • OK1RR
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A very simple addition would turn the SunSDR2 (DX, Pro or QRP) to an almost perfect CW rig! Simply use the A2 antenna connector as TX output and A3 as RX input and disable the annoying antenna relay (deactivate, prevent from switching). We can rely on the AMP with PIN Diode T/R switching, there will be an independent RX path. The AMP modification will be very easy (if it is not already made) and amps like KPA500, KPA1500, RF2K-S (by RF Kit in Germany) and many others (some with QSK-1500 add-on board) may provide the T/R switching. Unless 100 watt barefoot operation, the SunSDR2 does NOT need any T/R antenna switching. Let’s hope that the antenna relay is the ONLY mechanical relay involved in the T/R switching procedure.


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