K2 #5266 aligned beautifully after I fixed C-6 which the Cheap 'N Dirty Signal Tracer found in about 2" flat. I had it on the air and made about 100 cw contacts before adding some mods: DSP, SSB, NB, 160 meters and 60 meters. I had a problem which was resolved but involved a master reset...so I started on a complete re-alignment today.
With the exception of the 40 meter band, the VCO alignment went "by the book" - 7000 and 7300 Mhz both read 7.92 volts and it does not vary as I tune between those frequencies. I have checked the parts which were replaced in adding the mods noted above and re-heated C-71 through 75 and D-19 & 20. Hooked it up for testing and it's still a rock solid 7.92 volts on 7000 through 7300. L-30 is the correct inductor; T5 (wound by Mychael) and D21-26 all worked the first time around on the VCO alignment so I doubt there's a problem there. Does anyone on the reflector have any idea where I should look next? If so, I 'd appreciate it! 73, Cary, K4TM Lynchburg, VA _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
Cary,
That means that your 40 meter band is not tuning at all. I believe you have the K60XV option installed - enter the menu and set D19 to 'y' and re-check the voltage at the left end of R30 for all band edges. With the K60XV installed, the usual extreme points can be found at 4000 kHz and 5300 kHz - if you get these in range, the others will normall fall into place properly provided the capacitors and varactors in the VFO range select area are correct. 73, Don W3FPR -----Original Message----- With the exception of the 40 meter band, the VCO alignment went "by the book" - 7000 and 7300 Mhz both read 7.92 volts and it does not vary as I tune between those frequencies. I have checked the parts which were replaced in adding the mods noted above and re-heated C-71 through 75 and D-19 & 20. Hooked it up for testing and it's still a rock solid 7.92 volts on 7000 through 7300. L-30 is the correct inductor; T5 (wound by Mychael) and D21-26 all worked the first time around on the VCO alignment so I doubt there's a problem there. Does anyone on the reflector have any idea where I should look next? If so, I 'd appreciate it! 73, Cary, K4TM Lynchburg, VA _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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