> tuning unit from WWII BC 375 MOPA transmitter. There are several mica
> capacitors inside, Cornell Dubilier Type 871-15LS, rated as follows;
> 2A @ 3000 Kcs, 3000 Volts, values are 90 pF and similar. Can I use
> them as (in case of need) paralleled caps with plate tuning?, can they
> be used at 160 Mtrs upto 20.?
The mica caps used in old sets like that are very good RF capacitors.
They are conservatively rated, so you can push them over the rating
by a reasonable margin.
You probably are safe up to about 3000 volts RMS, unless you want to
be sure to have 100% no failures ever.
They are very good RF parts, better than many are today.
73, Tom W8JI
W8JI@contesting.com
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