I'm very interested in this topic, having raised this question a long
time back. What I said in June 2011 was:-
/I'm using qsk on cw and I find that if the rf gain is turned up to hear
some background noise, there's a transient or click when the rig
switches to rx (but not when it switches from rx to tx). To hear this
really badly, try opening the cw b/w up to 2kHz and sending a stream of
dots. The effect is there even at 400Hz, and it's rather off-putting. /
It related to the barefoot K3 in normal break in, not QRQ. I am
referring to use on 6m where the background noise is relatively low, but
signals can be very weak. I do not have this problem with my other rig
- an Icom 575. It would be great to make the K3 as good, because I
found it so bad that I have stopped using QSK altogether.
Graham
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