I noticed that the width of this noise seemed to be the width of the pass band since when I changed modes (CW, USB, etc.) the width of the affected frequency spread changed. It also changed when I adjusted the filter width.
On Dec 30, 2010, at 5:02 PM, Stephen Prior wrote: > 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" <[email protected]> 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:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
