[R-390] A tale of two IF decks.

[Philip B Atchley]

Hello one more.
Just pulled the IF deck from Dons R-390A.  Even before pulling it I
"suspected" it was an "older" unit.  It is, it's an early Collins IF
deck.    

So, out of curiosity, I put it next to the '67 EAC IF deck from my
receiver.  There are many observable differences.  

They are...

1.  Most noticeable is the lack of filter trimmers on the Collins unit.

2.  The Collins appears to be "neater" in it's construction.  I.E.  The
cable harness is much neater, point to point wiring is neater also.

3.  The Collins has everything coated with that MFP crap which is going
to make re-capping a tougher job.

4.  The EAC deck had nearly all capacitors of the newer type, I.E. Yellow
Aerovox and metal/glass.  Only one "Brown beauty".  The Collins is full
of the BBOD's  

I believe this is an example where I'd take the EAC over the Collins
every time as it has all the updates.

73 de Phil  KO6BB
Loving home provided for wayward Boatanchor Receivers
ko6bb@juno.com
Merced, Central California
37.18N  120.29W  CM97sh

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