[Elecraft] Obscure RTTY bug?

[dalspaugh at comcast.net]

I am experiencing the same issue and have been for a while. It occurs for me without being in the text mode. Lyle says he is aware of it and is working on a solution. I think it has gotten worse in recent releases. I tried this morning turning the drive down to two or less bars, which used to fixed it, but now I can't get rid of it if there is any drive at all. 


73 Doug N3QW 


----- Original Message ----- 
From: "Iain MacDonnell - N6ML" <ar at dseven.org> 
To: "Elecraft" <elecraft at mailman.qth.net> 
Sent: Wednesday, December 31, 2008 5:39:34 PM GMT -05:00 US/Canada Eastern 
Subject: [Elecraft] Obscure RTTY bug? 


Preparing for the ARRL RTTY Round-Up this weekend, I ran into a strange 
problem. Using "AFSK A" mode, feeding transmit audio into the K3's line 
in from the computer running MMTTY (also tried with DM780, with the same 
result), I would get a crackling noise along with the RTTY tones in the 
K3's monitor audio. I don't know if the crackling is transmitted, or 
just in the monitor. Levels are set for 5 bars on the ALC meter, and 
the problem occurs in "TX TEXT" mode. 

After lots of tearing my hair out (well, at least tearing my cables out 
and trying other ones), I observed two things that make it go away: 

1) Changing to USB ("REV DATA") 

2) Turning *off* "TEXT DEC" 

I recorded the probleml, from line-out, with text decode on and off: 

http://www.dseven.org/k3/ 


Why the text decode would cause crackle in the monitor audio, and why 
not in "REV" mode, I'm not sure... but I would like to be able to have 
the decoder turned on... 

~Iain / N6ML 



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