[Elecraft] K2 #1059 VCO Alignment to 6.0V

[Don Brown]

Hi

Double check T5. The winding sense is critical on this transformer. Make
sure the windings start and finish exactly like the picture in the manual
and the winding direction is correct. Check for poorly tinned toroid leads
(PTTL) on T5. Check all the varactor diodes to be sure they are the correct
type and installed correctly. D19 and D20 should NOT be installed and the
menu setting for D19 should be set to "N" the default.

Don Brown
KD5NDB


----- Original Message -----
From: <wo7t@juno.com>
To: <elecraft@mailman.qth.net>
Sent: Sunday, May 18, 2003 11:36 PM
Subject: [Elecraft] K2 #1059 VCO Alignment to 6.0V


>
>
>
> Hello All:
>
> I have a problem VCO Aligment.
>
> The voltage on R30 should be 6.0V but I have 8.35V, and no
> amount of turning L30 changes it from 8.35V. It's steady
> at that voltage.
>
> C72 is 271, L30 is T1005, T5 is a yellow toroid, 16 turns of red wire
(pads 1&2), 4 turns of green (3&4)
>
> I judge from some other postings that removing a primary winding might
> move my voltage reading down, but why no variablity even at current point?
>
> Any help most appreciated.......
>
> 72,
> Mark
>