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: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] 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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