[Elecraft] K3 Audio I/O & WriteLog/RTTYrite/MMTTY

[rkayakr]

A cautionary tale

I am a long time user of MMTTY and DM780 for audio digital modes on my K3.
In getting ready for FD I set up RTTYrite with MMTTY for the first time in
WriteLog. When I went to test the output I found that the K3 went into
transmit mode but no signal was generated. Pulling the audio jack out at the
computer produced the expected squeals from the laptop. After rechecking all
settings I wiggled the audio line in plug to the K3 and was able to get some
signal. After repeated tries over several days with the same results I
concluded that the jack on my "old" (#70) K3 was loose and I ordered a new
audio I/O board. 

After replacement I had the same problem! 

I eventually discovered that there was no signal coming out of the left
channel of the laptop, which is the only channel the K3 responds to.
Wiggling the plug apparently caused the right channel portion of the plug to
contact the left channel jack. On a tip from a friend I checked
RTTYrite/MMTTY. Sure enough, even though I set the balance in the center
with the toolbar app, when I fired up Writelog/RTTYrite/MMTTY it would reset
the balance to the right channel only. It also locks the toolbar app out
from changing the balance back. MMTTY stand alone does not play this nasty
trick. I have observed it only when used in WriteLog/RTTYrite.

   Bob
     KD8CGH
       KX1 #1646
       K2 #2122
       K3 #70

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