[Elecraft] K2, distorted audio signal

[Wolfgang]

Hi,

In the meantime, I have probably made some progress.

I set up the K2 in another room in the garden for operation, and then I 
dismantle it again in the evening. I looked at the steps involved in 
dismantling and putting it away, trying to do things differently to see 
if the problem would occur again after turning on the K2 the next day.

In particular, I carefully folded in the tilt stand without 
bumpingthebottomcovertoomuch. Since there might be a connection there, I 
removed the bottom cover before switching on and tried to activate the 
distorted audio signal by tapping some places a plastic rod.

I discovered that the problem could actually be triggered by tapping the 
two 1/4" standoffs (Figure 6-3). One of the standoffs was slightlyloose 
because the #4 lock washers were missing from both screws. I have now 
added these.


I have to check if the audio problem occurs again when the tilt stand is 
folded in tighter. I also need to try triggering the problem by tapping 
other components in this area.

Once the distorted audio signal has been triggered, this can be 
corrected by changing the band several times. However, a connection with 
switching to the 20m band in particular has not been confirmed.

Apparently the effect is triggered by a vibration. The connection 
between the bumping on the two standofs and the distorted audio signal 
is still not clear to me. It is also not clear why the signal returns to 
normal after changing the band several times.

IhopethatIhaveexplainedeverythingclearly.


73, Wolfgang
DL2KI


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