Rolf, >From your symptoms, it would appear that the EEProm is either not being written or not being correctly read, or that the PLL is not properly responding to the control voltages being fed to it.
First, re-check the PLL range to be certain it is correct - if it is correct, then the PLL itself is likely not the source of your problem, so proceed as follows: Re-check the VFO Range selection voltages at the end of RF Board R30. If all voltages are not within the specified range, VFO linearization may fail to produce expected results. Check and re-check the soldering at RF Board U6 and U5, then check the soldering at RF Board connector J8 - epecially pins 16, 19 and 20. Check the same pins on the mating Control Board connector P3. After that, check the soldering at Control Board U7 and U6 pins 22, 23 and 24. If everything is good at all those locations and it still does not work, you may want to try an email to Gary mailto:[EMAIL PROTECTED] to see if he has any additional suggestions. If the problem should be in the EEprom or the signals that drive it, that area is very difficult to troubleshoot and Gary's expertise will be needed. 73, Don W3FPR > -----Original Message----- > > I am Rolf, DK8SJ, a new member of this list. 3 weeks ago I got my K2 SN > 5218. > Now I am in the stage "Alignment and Test, Part II". > All tests are within the range and I receive strong and stable signals > on 40m. > > But I have a problem: > > Tuning on the main-knob I have a continuous frequency readout on the > display, but the actual frequency makes alternating steps of abt 0.200 > kHz and 3.8 kHz. The VCO-Voltage shows according steps. > During "VFO Linearization" nothing happens until the end of the test > after 8 minutes the frequency drops down abt 15 kHz and "END" is > displayed. No letter "d" appears during the test. > > Solder joints etc. are triple-checked. Who can help? Thank you in > advance. > > 73 de Rolf, DK8SJ > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
