[Elecraft] RTTY Problems

[Ken Alexander]

Hi folks,

I'm operating in the BARTG RTTY contest this weekend
with my K2 with a Tigertronics SL-1+ audio interface
and a MicroHam CW Keyer, which handles the computer
control of the K2.  I'm using MMTTY and N1MM logger.

Everything worked fine last night.  I was in RTTY mode
because the DSP filters are set up nicely for RTTY. 
(The crystal filters in RTTY mode are unusable for
RTTY because they're centred on voice audio
frequencies and not RTTY freqs.  But that's another
story.)

Anyway, the real problem started when I started
operating this morning.  I called someone and the
interface keyed the PTT line but no transmitter
output.  I hit the K2's Tune button and get full
output.  I switch to LSB and transmit and get full
output on RTTY, but of course the filter situation is
even worse for RTTY operation when in LSB.

Strange that it would work OK all evening and then not
the next morning.  I guess that's my punishment for
sleeping during a contest!

Any theories, suggestions or recommendations would be
most welcome!

73 and thanks,

Ken Alexander, VE3HLS