Hi Paul, 
Although I do not use MMTTY ,  the fact that you have the lights and TX on the 
k3 working suggests that the ptt function (or VOX) is correct. 
The fact that all of the other software is working suggests that something 
related to the sound card settings in MMTTY is incorrect. Perhaps it has its 
own level controls or you have the wrong i/o settings. 
Can you receive correctly? Have you set the input on the k3 to the line in? 
Hope this helps. 
73's Tom 
va2fsq.com

On Oct 13, 2014 2:50 PM, paul ecker via Elecraft <[email protected]> 
wrote:
>
> I am having problems getting MMTTY to transmitproperly using K3 with a 
> Signalink USB interface.
>
> Currently, when I go to TX in MMTTY, I get red TXlight on Signalink, a red TX 
> light on K3, I hear diddles coming out of theSignalink rear monitor jack, and 
>  I seemovement on Vu meter in Windows sound playback tab. BUT I get no RF out 
> on K3 RFmeter, no movement on K3 ALC meter and I am not hearing any diddles.
>
> - PC is Win 7 64 bit, i5 3.5ghz processor, 16gbof ram
>
> - My K3, Signalink, PC setup is working finewith DM780 PSK31, JT65HF, WSPR 
> and WSJT-X.
>
> Would appreciate talking to someone who hasMMTTY running successfully  using 
> K3 witha Signalink USB  to share setup information.
>
>  
> Tnx & 73
>
> Paul
>
>  
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