[R-390] Re capping an IF Deck

[Tim Shoppa]

>	I mention this because it appears that at least some of the recapping 
> may have been done for me.  I find no "brown beauties" in this deck at 
> all.  In (some of) their place have been installed "Westcap" units, 
> however I can't tell if they are still paper units or not.

Those westcaps are very similar to Sprague "Vitamin Q"'s.  Paper-and-oil capacitor
that's hermetically sealed in a can.

One of my EAC IF decks has a mix of brown beauties and Westcaps and Aerovox caps.
I think they're almost all original... my guess is that they are arranged according
to allowable leakage current.

My gut feeling is that the Vitamin Q's/Westcaps are superior to the others but
that they do go leaky over time.  And they probably were installed in the locations
most sensitive to leakage to begin with.  I say that if you're doing a mass replacement of
everything else, you oughta do these too just to save the effort of going back in
later.

The other EAC IF deck I have is all brown beauties.  So maybe the ones with
the others truly are replacements done by the military.  They don't look like re-work
but then again it was done decades ago...

> Other caps are Aerovox units that are probably wax paper jobs.  These 
> live in places such as:  C-528, C-529 and C-521 among others.  Some of 
> these seem to be in good physical condition, but some have deformed from 
> their original round shape to oval in some cases.

I thought that they originally came oval?  (And my head was always bald too...)

New yellow wax paper caps are certainly available in oval.  Handy when there is
low chassis clearance with a PCB.

Tim.