[R-390] Staggered IF Question

[Tony Angerame]

I have a Capehart R-390a in truly excellent condition. It was apparently 
stored in a closet shorthly after Vietnam.
I've done a fair amount of recapping etc but the radio plays great and 
doesn't appear to need an alignment with one exception.
I noticed that when I select the 4 kc and below filters the signal level 
as indicated by the carrier meter decreases by about 5-10db.
This is true for .1, 1, 2 and 4kc vs. 8 and 16. I swept the input of the 
radio at the selected bandwidth say 16 kc from my generator and noted 
about 6 peaks throughout the 16 kcs I swept and noted proportionally 
less peaks for the lower bandwidths. So my theory and my question is am 
I seeing the peaks of the six tuned circuits in the IF (455)? Has this 
radio been stagger tuned to produce a unifirm bandwidth in the wider 
positions? Is this why I notice a slight increase in gain when I select 
the wider selectivity positions? I notice that the manual calls for a 
peak alignment of the IF transformers.Seems to me this would cause a big 
"Hump" especially in the wider positionsand I'm better off with what 
I've got.



Thanks,



Tony