[R-390] Question to post

[Dave or Debbie Metz]

Jack,
Not sure but here's my thought. These caps are non polarity and even today, 
non-polarized caps seem a bit big compared to their brethren electrolytics. 
Trying to think about 1950 manufacturing gives me pause that Collins 
couldn't get a 2mf cap either easily or as cheap as two 1mf caps as you 
suggest. I had one go bad and replaced both of them with about 1.5mf total 
and it works great.
73's
dave



At 02:45 PM 5/2/2005, Jack Sullivan wrote:
>My Collins R390 (not "A" version), on I.F. deck, has
>two top chassis mounted OIL FILLED condensors, side by
>side, 1 mf-400 volts each, hooked in parallel, giving
>2 mf 400 volts.  They are a coupling to AGC circuit.
>Why in the world did Collins design two such
>condensors to be wired in parallel, rather than just
>installing one 2 mf-400 v. condensor, was it, perhaps
>because a larger 2 mf. wouldn't fit in spot on chassis
>top, or could it have been that they just didn't have
>available to them at time 2 mf cond. needed?  Best,  Jack
>
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