James, What rev of firmware are you using? I went through test on all of them I could with the subreceiver, which I didn't install until 2.72 was current. I can't duplicate your results with 2.82. It may not be a firmware-related issue (or issues).
In the first problem statement, it sounds like you have the VFO's linked. Are you also in DIVRSTY or not? As I understand it, the spectrum covered is carved up into band sections, each allowing the VCO control voltage to traverse a good part of its control range. Very few (if any?) of these breaks is within a ham band. The behavior you described at 5997 could be tied to the down-tune break at that freq. The up-tune break is 5 KHz or so higher. You might want to see if you can repeat this tuning up as well. I can't duplicate this problem here with 2.82. If there is a real bug here in the FW rev you're using, it *ought* to affect tuning in both directions. For your second problem statement, the following may apply. There is a chirp radar between 5184 and 5212 KHz (approx). The chirp goes through the passband pretty quickly, maybe within 150-200 mS and the rep rate is a little under one second. It's a wideband signal, and you may be hearing it as a zipper-like noise. You didn't say whether or not you heard it as a repeated or continuous signal, so I can't be sure this is what you're describing. 73, matt zilmer, W6NIA On Sun, 22 Feb 2009 16:40:24 -0500, you wrote: >Dear group, > > > >Someone please explain to me what's happening with my K3. I have both main >receiver and sub receiver linked. This way, I can tune the sub receiver >with the main VFO knob. However, there's something weird going on when I >cross some sort of band edge. > > > >For example, if both VFO A and VFO B are set to 6.020.00 and I tune down the >band using the main VFO knob, as soon as VFO B reaches 5.997.00 the readout >in VFO A will jump almost 900KHz down to 5.030.1. When tuning back up the >band, when VFO B reaches 6.017.0, the reading in VFO A will jump almost >900KHz again to 6.959.0 Sometimes the difference can be 500KHz or 900KHz. >When this happens, I also hear a clicking noise in the K3, and I'm assuming >it's a relay switching. > > > >I've seen this behavior while tuning up and down, which leads me to think >that the K3 is hitting band edges and adjusting, but the strange thing is, >the frequency between VFO A and VFO B do not stay the same. > > > >Also, and possibly another more concerning issue is that when the sub >receiver is on, and I'm tuning anywhere from 4.9 to 5.9MHz, there is a loud >motorboat or zipper noise that is heard through the speaker, and is affected >by spinning either VFO A or VFO B knob. The noise stops if you don't turn >any VFO. Turn any VFO knob though, and the motorboat zipper noise resumes. >If you turn off the sub receiver and spin any VFO knob, this "zipper-like" >or motorboat noise almost goes away. It is still there, but now very faint >and can barely be heard over the static. > > > >73, > >James KC2UEE ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
