[R-390] Working on R-390A IF Deck

[Rbethman]

Gang,

I've been working on an R-390 Collins IF deck.  It is an early one with
no trimmers on the filters.  (Just reference info!)
I had to replace Z-501 due to a broken slug and broken off adjustment
"head".

I have the TMs, the Y2k manual and all procedures.  This is the SECOND 
one I've brought back to life.  It IS a Blue Striper.  For some miracle, 
it is in VERY good shape otherwise.  Just some grit in the chassis, NO 
corrosion.  It MUST have been buried in the center of St. Juliens!

RF deck is in great shape.  Harness is is normal shape for a radio on 
the '51 contract.  All modules EXCEPT the AF deck and the PTO are ALL 
Collins.  Even missing ONE fuse holder on back.

Replaced BBODs.

What would be the most reliable way to set this oscillator system "on
the money" for 455kHz?

Scope, Sig Gen., and Freq counter are available on bench.

Bob N0DGN

-- 
Bob - NØDGN
                       Bob Bethman - NØDGN
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