Don -
Thanks for the reply. I checked as you suggested, T5 turns are okay, I
looked the capacitors over good and resoldered all, okay. I do have the
rework eliminators installed, and I looked them over good, seems okay. No
real change. The strange thing is, when I first power up with the VFO set
at 4000, I measure about 5.3 volts at R30 and it slowly drifts up. After 5
or so minutes it's at 6.3 volts and still climbing. I think the work I did
before that I thought allowed me to adjust L30 really was a matter of me
powering down to spread the windings on T5 and then powering back up. It's
a clue, but I don't know what it means.
Steve - WD7M
----- Original Message -----
From: "Don Wilhelm" <[EMAIL PROTECTED]>
To: "Steve Taylor" <[EMAIL PROTECTED]>; <elecraft@mailman.qth.net>
Sent: Thursday, May 18, 2006 7:13 PM
Subject: RE: [Elecraft] VCO Alignment
Steve,
Check the number of red wire turns on T5 - count the wire as it goes
threough the center of the core - counting only the outside turns can
produce a numer that is one turn less than the proper number. This sounds
like the sitation that occurs when there is one extra turn on T5.
If you find the turns on T5 are indeed correct, the next most probable
area
to be investigated is the capacitors in the VFO Range Select area.
If you have installed the rework eliminators, be very certain you follow
the
instructions for the rework eliminators carefully - the capacitors for the
VFO Range select area chnge with these instructions.
73,
Don W3FPR
-----Original Message-----
I ordered K2 #5329 in January, and was just able to start on it a few
weeks
ago. After a short break I'm back at it and this afternoon got to the
Alignment and Test, Part II. All was well until I got to VCO Alignment on
page 61. At first I was not able to adjust L30 and get the VCO voltage to
6.0 volts. All I could get was 7.99 volts. After reading the archives, I
spread the turns on T5, and sure enough, I could get 6.0 volts at R30.
But,
it seems after adjusting, it drifts up slowly. So, I decided to go
through
the bands and see what I got. At 3500 Khz, it was a little low, and
everything 7300 and above is at 7.99 volts. I've looked the board over
again and again, and can't see anything wrong. Whenever I check R30 at
4000
KHz, it will be off 6.0 volts, when I adjust it back, it continues to
drift,
and everything above 7300 is pegged at 7.99 volts.
I hope someone has some suggestions, because I'm stumped.
Thanks in advance, Steve - WD7M
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