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Hi Jim,

My colleague Ed Murphy (GM3SBC) and I have been developing the Globemaster SDR over the past few years (more info ). We have been using Quisk 4.1.41 for some time now, although we're very keen to upgrade to 4.2.9 to take advantage of new features such as remote operation.

The Globemaster hardware handles the CW modes - keyer detect (iambic or straight modes), semi break-in, auto tx/rx change over etc. To achieve this we configure Quisk in receive mode, full duplex, with the sidetone going out on the transmit channel. The Globemaster then modulates the sidetone in line with the CW keyer and mode. During CW transmission the receive channel is muted by the Globemaster and unmuted when the CW keyer is inactive. Our support file invokes the QS.set_fdx(1), QS.set_key_down(1) and QS.set_transmit_mode(1) when the Quisk mode changes to CWU or CWL. This works well, with Quisk outputting a continuous sidetone on the transmit channel whilst simultaneously receiving.

With Quisk 4.2.9 this no longer works, the set_transmit_mode() method is no longer available, we have tried XXset_transmit_mode() but so far we have not been able to get a stable sidetone on the transmit channel. We have occasionally observed a sporadic sidetone during debug, but this hasn't been repeatable, but it does indicate that a stable sidetone might be achievable.

Any help you can provide to assist with our debug would be greatly appreciated.

Kind regards

Andy