[Elecraft] AFSK A not working, while DATA A is!?

[Frank R. Oppedijk]

Hi,

Most  of my operating time, I do CW, but sometimes I do some RTTY 
QSOs. Today, after what must have been a couple of months, I felt an 
urge to fire up MMTTY again, so I tweaked the necessary controls on 
my K3 and on my PC soundcard. But no transmit output?! The PTT is 
asserted and the receiver is muted, but no transmit output and no 
monitor output. I rechecked all controls and referenced my notes, but 
nothing wrong was found.

After experimenting a bit more, I found out that everything was 
working fine when I changed the DATA MD from AFSK A to DATA A! Now 
I'm puzzled: as far as I know, these two modes use exactly the same 
inputs and controls...

Can anyone help me out? What setting or control can be the cause of this?

Thanks in advance,

Frank PA4N





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drs. ing. Frank R. Oppedijk
Avista B.V.
Oostvaardersdiep 9
1309 AA  Almere

tel: 036 - 737 00 55
GSM: 06 - 26 214 365