Just in case this helps someone else: My problem was in my VFO pot setup.
I have a pot with three inline contacts. The numbering on the pot seems to
indicate that 1 & 3 were the ends of the variable resister and that 2 was
the wiper. I've learned to test the pot and it turns out that 1 & 2 are the
ends and 3 is the wiper. 1-2 is about 100K ohms, 1-3 + 2-3 adds up to about
100K ohms. I needed to follow the pictured instruction not the numbering on
the pot.
NU6T
Rich
-----Original Message-----
From:
[hidden email]
[mailto:
[hidden email]]On Behalf Of Richard Hill
Sent: Saturday, June 09, 2007 8:41 PM
To: Elecraft Reflector
Subject: [Elecraft] [K1 2277] VFO Alignment--VFO Range Test
I'm not succeeding in changing the VFO frequency for the K1 range test. (80
kHz set up).
On start-up, I see a number "6", then "986", and then "86.2" which stays on
the display. If I hold EDIT it shows OPF. If I hold DISPLAY it shows OSC
and the display shows "3" and then "098". So far so good.
The next step is to make sure that the VFO frequency goes up as the VFO knob
is rotated counter-clockwise. I'm seeing no change as I rotate the VFO
knob, so off to troubleshooting in Appendix E.
At Problem 40: Supply voltage is 13.23 V, Solder is Kester 44, 0.015.
L1 leads are properly stripped and show 0 ohms resistance across the leads.
--How do I check crystals? I see infinite resistance between the leads. I
used minimum solder time, about 2-3 seconds as I recall.
At problem 41: Anode voltage was 3 V (measured with black lead on the
ground, and red on the anode) on D3 and 6 V on D4. I'm not sure which is
the OFFSET pot. I think it is C20, but I have not found a way to verify in
the manual. C13 is in the TR Switch and Transmitter section. The varactor
flat side is facing the same direction as the transistors near them: flat
side towards the front.
I'm probably missing something simple, but it is not popping up for me.
Thanks for any help.
NU6T
Rich
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