[Hammarlund] Additional SP-600 Tuner Funzies

Thu, 21 Aug 2003 09:07:56 -0700

I was curious if the original tuning dial markings could be slightly off
from printing or painting however it was done back then.  I can set the
tuning real close for the two upper bands but, then the lower frequency
bands linearity is out. If I set the linearity for the lower four
bands(using one of the lower bands) then the opposite occurs.  My dial is
original and not a label.

Thanks for your comments
Dave Faria
----- Original Message -----
From: Dave Faria <[email protected]>
To: hammarlund <[email protected]>
Sent: Wednesday, August 20, 2003 6:56 PM
Subject: [Hammarlund] SP-600 Tuner Funzies

> GE List.  I am trying to make my 600 tuner linear so that it points
> (hopefully) at the correct frequency thats being received.  So far with a
> fair amount of work its now better but, not quite right.  What I have
found
> out for anyone else who wants to try is u always tweak the vfo tuner cap
> plates at the high end of the group of frequencys you want to correct.
> Correcting at the high end shifts all of the frequencys below either up or
> down.  I used the upper frequency bands to adjust the vfo because of the
> better resolution on the dial.  Also you need to let the radio operate on
> the band for a couple of hours that you want to adjust.  After you think
> u've got the VFO linear u will have to reset the end points for each band.
> Now this is my problem - I cannot get the tuning on all of the bands to be
> exactly right on the money.  Am I expecting to much because I've been
> spoiled by digital technology?????
>
> Thanks for your comments
>
> Dave Faria
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