[Elecraft] K3 weird noise generation...??

[Stephen Prior]

Phil

I have seen the same kind of thing twice, only over roughly twice the
frequency range you describe.  However on both occasions the only solution
was to do a recalibration of the VCO from the config menu. Simply turning
the K3/P3 off and on did nothing in my case. I recall that on both
occasions the beginning and end of the noise was accompanied by the sound
of a relay operating within the K3.  I've not had it now for two or three
weeks.  

I run HRD with the K3/P3 as a logging program.  This may be significant, I
don't know.

73 Stephen G4SJP

On 31/12/2010 00:41, "Phil Hystad" <phystad at mac.com> wrote:

>
>I came home from work and turned on the K3 and the P3 and then switched
>to the CW zone of the 40 meter band. The VFO was about 7.009 as left from
>my last visit yesterday.  I turned the VFO up just a tiny bit and this
>strong, like S9+ broadband noise came through.  Funny because I remember
>looking at the spectrum of the P3 and I did not see anything there.
>
>A long story short.  I discovered that this noise was being generated by
>the K3.  I had checked the band with my Icom 756 Pro III and nothing was
>there except lots of CW signals.  I tuned the Pro III around the same
>spots as the K3.  So, I rotated the VFO slow up frequency from 7.009 and
>at 7.00945 the noise started and continued up to about 7015.5.  Now, on
>the spectrum this was a good 50 dB over and above my normal noise floor
>(sorry, not sure if I am using the right terminology) and it was the same
>across the entire spectrum which by the way was set wider then this
>frequency range of 7009 to 7015.  And, all other CW signals disappeared
>and many of them were stronger then this noise level.
>
>So, if I turned the VFO just past the upper threshold of 7015.5, the
>noise disappears entirely and there is nothing but normal display of CW
>signals on the spectrum.
>
>I then decided to power off the K3 and P3.  Powered back up and this
>weird noise phenomena disappeared.  Now, the K3 and P3 is acting normal.
>
>Anyone see anything like this?
>
>73, phil, K7PEH
>K3 Serial #3799
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Elecraft at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>