[Elecraft] Mushy CW in QSK at 38 wpm and above...

[Bill Frantz]

I don't know if this applies to your station, but if you are 
using a level converter circuit similar to the one in Fred's KX3 
book -- 10K input resistor to NPN base with a diode to 
ground/emitter and a .1 MFD cap between the collector/output and 
ground -- this might apply.

I was using the circuit to level translate RS-232 input to an 
Arduino. I discovered that the .1 MFD cap so distorted the 
signal waveform that it wouldn't decode in the Arduino. Removing 
the cap fixed the problem.

73 Bill AE6JV

On 1/11/16 at 8:14 AM, gerry at w1ve.com (Gerry Hull) wrote:

>I was operating VE4EA in NAQP this weekend...
>
>A couple of people said the CW sounded mushy.
>
>I was running QSK, with N1MM DTR CW Keying using the KUSB.
>
>I noticed, on the sidetone, that it got mushy around 40 wpm.
>
>I don't know Cary's firmware rev.  Is there a fix for this?
>
>(This is with RIT off).
>
>Interestingly, I also used the K3S at VY1AAA, at the same speeds.  No
>issues.
>
>Did anyone notice this on the sig?  Is there a later firmware that
>addresses his issue?
>
>73,
>
>Gerry, W1VE / VE1RM

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