Re: [Elecraft] K2 7747 VCO alignment problem

Keith, Not a nice problem to address. I can give you some troubleshooting information if you are willing to hang in there with me. Eliminate the "[Elecraft]" from the subject line and reply to me directly (not to the list). Relay K15 is common on all those bands, but not on 80 and 40m, but

Re: [Elecraft] K2 7747 VCO alignment problem

Thanks for your help Dave! Yes. I was able to get 6 volts on R30 by turning L30. At first the voltage was too high so I adjusted the turns on T5 by spreading the red windings further apart. Then I was able to get to 6 volts. I did a CAL FCTR with the probe on TP1 and the frequency set to 4000,

Re: [Elecraft] K2 7747 VCO alignment problem

Hi Keith, Were you able to get 6v on R30 by tuning L30? Did you have to bring the voltage down or up by moving the windings on T5? If you would, set the VFO to 4 MHz and do a CAL FCTR on TP1 and let me know what the reading is. I'm just looking for a couple of clues before we proceed. 73,

[Elecraft] K2 7747 VCO alignment problem

I am having trouble with the K2 VCO alignment. I have moved the T5 windings and obtained 6 volts at the left end of R30. I then went on to the chart (table 6-1) to measure the voltages at the listed frequencies. My readings are ok on 80 40 and 15 meters (between 1.5 to 7.5 volts) but on 30,20,17