[Elecraft] [K3] RTTY Questions

Wes wes_n7ws at triconet.org
Fri Apr 30 18:32:44 EDT 2021


Are you using an external RTTY program, e.g. MMTTY?  If not and you're using the 
internal CW to RTTY feature, I can't help you.  Otherwise I'm assuming audio 
input via Line In.  Baud rate is set in the program.

Make sure the audio drive, set by 1) soundcard level and 2) "Mic" gain, drive 
the ALC indicator to four bars.  Less and the power control loop will try to 
adjust, but it does this slowly. Otherwise it could be a blown final, in either 
of the PAs (regrettably too common) or a mistuned BPF.  I don't know how common 
this is but it happened to mine.

Wes  N7WS

On 4/29/2021 8:18 PM, John Reilly wrote:
> I have two K3 questions:
>    1. In Data MD, AFSk A, you can set the baud rate to either 45 or 75. Is the 
> baud rate just for the RTTY reader? Does it affect anything else?
>    2. With my K3s power set to 100w, RTTY starts at a little below 50w and and 
> then fairly slowly builds to 100w (measured on an external wattmeter). I've 
> done a TX calibration -- no change. What is going on?
>
> Thanks,
>   - 73, John, N0TA
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