[Elecraft] Sidetone Pin Pricks

Sat Apr 3 20:59:01 2004

About a year ago I put the modification to get rid of the pin-pricks in
my K2 sn 1031. I liked it but was discouraged from keeping it by Wayne's
letter on this reflecter so I removed it. I end up turning down the AF 
gain while I transmitt. I would like to know what the problem is with
using this modification and since it bothers many people on the list what
is the proper way to solve this problem. I would like to put it back in
my K2.

Ken Christiansen W0CZ

Message: 2
From: "Indy" <[email protected]>
To: <[email protected]>
Date: Fri, 2 Apr 2004 06:39:45 -0700
Subject: [Elecraft] sidetone pin-pricks

I have "pin-pricks" in my sidetone when the QSK changes over.  this =
began with the change from the KAF2 to the DSP.  Lyle has a mod he =
suggests which slows the rate of the QSK way down.  Wayne suggests this: 

>"Another way to achieve the same effect is to insert a largish
> resistor (try 100 k) in series with pin 17 on the MCU. This would add
> only 150 microseconds to the /mute fall and rise times."

Has anyone tried Wayne's suggestion?  I am not anxious to cut a trace =
without knowing if it works!