[R-390] Staggertuned IF Question

[Mark Huss]

I seem to remember that the first run of R-390A (the ones WITHOUT the 
trimmers on the top of the mechanical IF Filters. The Mechanical filter 
cover does not have a dimple at the mounting screw) was straght tuned. 
When Collins did the mod to add the trimmers, they also changed the 
circuits on the IF Transformers to stagger-tune them. At least that is 
what I remember from the R-390A classes.
-- 
----------------------------------------------------------------------
Some people are like a Slinky .. not really good for anything,
but you still can’t help but smile when you shove them down the stairs.
----------------------------------------------------------------------