>> 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.
** 90pF has 884 ohms of reactance at 2MHz. I=E/R. 3000Vrms/884-ohms =
3.34Arms.
>...
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
end
|