[Elecraft] RE: K2 40 tTr VCO lock
Don Wilhelm
w3fpr at earthlink.net
Sat Mar 25 16:55:53 EST 2006
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
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