[R-390] Tuning the IF question

[JMILLER1706 at cfl.rr.com]

There is a hole in the top slug that a tuning tool will pass through to 
get to the bottom slug, but the tool needs to be small enough in 
diameter to pass through and still mate with the bottom slug.  Most IF 
tuning tools have two sizes at each end.  The smaller diameter end will 
pass through the hole.  You do not need to remove the top slug!

----- Original Message -----
From: paolo gramigna <paolo.gramigna at controllo.it>
Date: Wednesday, January 4, 2006 12:09 pm
Subject: [R-390] Tuning the IF question

> Hi all,
> I'm trying to tune up my first R-390A. I have the manuals.
> When i came to the IF tuning, the manual says that each 
> trsnsformer has two
> lugs; the primary in the bottom, the secondary in the top. The 
> problem is,
> how can i reach the bottom one? There is no hole in the IF module 
> chassis;to reach the bottom lug, i have to remove the top one; and 
> so the
> transformer goes so much out of tune that no reading is possible 
> on the
> VTVM. Where am I wrong?
> 
> Looking forward,
> Paolo from Italy
> 
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