[Elecraft] [K3] USB Interface

[Don Wilhelm]

John,

Look back to posts earlier today regarding WSJT-X.

We have been discussing how to set the audio levels for WSJT-X, but the 
same thing applies to and all other soundcard digital modes, including 
AFSK A - which you should be using with MMTTY.  It defaults to LSB, 
turns off compression and TX EQ (so you don't have to disturb your SSB 
settings).  See the manual for the features available with AFSK A mode.

Set the MIC SEL to LINE.

Like all other data modes with the K3 (and other Elecraft gear), set the 
audio for 4 bars on the ALC meter with the 5th one flashing.  Adjust the 
power with the POWER knob.
Ignore the common internet advice (and some software instructions) which 
say to "set the power to maximum and use the audio level to control the 
power" - that does not work well with Elecraft gear because it is unique 
among amateur tranceiver in the way the power is controlled.
Some commercial transceivers control power in the same way as Elecraft 
gear, but no other amateur transceivers that I am aware of.

73,
Don W3FPR

On 9/8/2017 3:02 PM, John Reilly wrote:
> I have the USB interface card in my K3. I use the audio out (USB 
> Microphone) for the MTTY program. Question is how to set the audio 
> levels. FWIW, I currently have the K3 Line Out set to 5, and the 
> computer USB Mic level set to around mid-scale. Is there a better 
> combination for improved dynamic range and low distortion?
> Thanks,
>    - 73, John, N0TA
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