[R-390] Tuning the IF question

[mikea]

On Wed, Jan 04, 2006 at 06:09:29PM +0100, paolo gramigna wrote:
> 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?

Hi, Paolo. 

I think that the way to do this is to reach through the top slug to 
tune the bottom slug. This, of course, assumes that the slugs are 
hollow. I seem to remember that they are in fact hollow. 

Any other R-390A tweakers care to comment? 

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin