[Elecraft] Audio

Mon Feb 3 21:41:01 2003

Brent:
  Does this happen with earphones as well as with the speaker? or with a 
separate external speaker?  It is quite possible for there to be physical 
resonances in the speaker or the case or nearby objects that can make 
particular frequencies sound harsh and distorted.  If it happens also with 
the cans, then can you put the audio output to a scope to see what's 
happening?  Is the sound clipping (unless reduced by moving to the filter 
skirts)?  If so, then start tracing backwards along the audio path with the 
scope to see where the clipping is being introduced.  That should indicate 
the culprit.

best wishes,

dave belsley, w1euy

--On Monday, February 3, 2003 9:24 PM -0500 "WB4X (Brent Sutphin)" 
<[email protected]> wrote:

> I have K2 #2571. It has always worked very well with the KSB2, KNB2, KAF2
> and KAT2 options installed.  Recently I installed the revision A to B
> upgrades. I didn't notice any problems after the upgrades. Last weekend I
> installed the KIO2 option.  It also works just as it is supposed to.  The
> problem I am having is that now if I turn up the volume to a medium level
> the audio gets really distorted.  It is more noticeable while coping cw.
> The distortion seems to occur right at the cw note frequency (600hz). If
> I tune off frequency slightly it seems to get better.  Anybody have any
> ideas?
>
> Brent
> WB4X
>
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----------------------------------
David A. Belsley
Professor of Economics