Still had no joy in getting WSPR to tx. I have checked every level I can think of, audio in and out are OK, tried every PTT option - no joy.I have read every guidance I can find on the Internet. In fact I have spent the last two days trying to sort this out.

I am using HRDv5/DM780 and a Signalink USB. All works OK for PSK but on WSPR TX the PTT light illuminates on the Signalink but my IC700 does not trasmit. WSPR Receive is fine.

I guess the problem lies with the HRD/DM780 but I have tried every combination I can think of.

it is probably something obvious, but I am new to this and stuck!

73s