[Elecraft] K2 distorted audio on certain freq.

[Mike Duke]

     Thank you Keith. I had forgotten to say that, this particular K2 has
only one add on board and that would be the side band board. There is no
noise blanker.
     Now I did go through each band looking for a aegment of distortion
that may be present on the other bands but being the time of day is
evening, could only check on 80 and 40 meters. Although earlier before
sunset there was still traffic on 20 meters but the whole band was clean.
     All of 80 meters was clean as well was 40 (except again on 7.184). It
sounds like a warbly distortion that a Ten-Tec Omni D or Corsair would
demonstrate when the VFO needs to be rebuilt.
     Tomorrow I will record an audio clip and post it.

     Thank you again.

Mike
Kj4pom


On Sat, May 23, 2020, 23:32 Keith Onishi <jh3sif at sumaq.jp> wrote:

> If you have strong pulse noise and noise blanker enabled for eliminating
> the noise, you may hear signals with some level of distortion.
> How distorted depends on the noise strength or pulse width of the noise.
> You may reduce RF gain of your receiver to improve relative signal to
> noise ratio and disable the noise blanker.
>
> 73 de JH3SIF, Keith
>
> > 2020/05/24 11:38、Mike Duke <kj4pom at gmail.com>のメール:
> >
> >     I have a new acquisition. I traded my Corsair II for a K2. Going
> > through it and finding small issues that need to be addressed.
> >     Besides just needing a thorough alignment, have noticed that on 40
> > meters at 7184.00, the audio is extremely distorted but not on any other
> > part of that band. I have the owners manual, nothing in trouble shooting
> > about distortion.
> >     Ser. #3631.  K2 IOC 1.07.  K2 MCU 203.   KSB2 1.07
> >
> >     Every 5 minutes I also here a noise like a quick cyclic pulsing for
> > about 5 seconds and it goes away.
> >
> >      Does anyone know of a  regimen of procedures I could start to
> > troubleshoot and check these issues?
> >
> >     Thank you
> >
> > Mike
> > Kj4pom
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