Mark,
I'm planning to install an RX only antenna. I will have a relay to
detach and ground this antenna, if the TX signal of one of the stations
goes active. This implies two things: the TX active signals have to
appear earlier than the HF power - which is the case with both the
SDR-1000 and
Luer,
Here's a cheap and easy way insure the antenna receive antenna is
disconnected from the SDR (transceiver) and the antenna is grounded
before the TX is keyed. Use a DPDT relay, it can be small as it
switches little power. One pole has the swinger connected to ground
and when energized
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