>
>
>I need to build a filter bank for 8 kv @ 3 AMPS, WHAT are the
>considerations for series and and parralel operation of two
>electrolytic banks to obtain 40 to 50 uf at 10kv?
105º deg C rated electrolytic capacitors last much longer than 85º C rated
electrolytics. - - I would use 2x 24 Panasonic [Matsushita] 470uF, 450v,
105º C rated units in series parallel. This would deliver about 40uF @10.8kWV.
I would use one 100k ohm, 3w equalizer resistor across each pair of paralleled
470uF units. It is my opinion that for SSB operation, less C would work ok.
Also, I would mount the individual electrolytics on a
7mm or more-thick acrylic sheet with silicone rubber adhesive to reduce case
stress. (Digikey currently sells these caps. at c. $12.20 each in >10 unit
quantities.)
> Oil capacitors are
>hard or too expensive to find. The Current rating of most
>electrolytics are around 1 amp, how would they operate at this current?
At 3A on RTTY, Hot. The solution is to use paralleled units to divide the
ripple current burden. It's not a bad idea for electrolytics to be mounted
with air gaps and to use a bit of forced air cooling.
>
>
- later, Igor
Rich. Measures. Web site: www.vcnet.com/measures
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