This could give you a "ballpark" estimate...this is the Vishay-Draloric
datasheet for their big ceramics:
http://www.vishay.com/doc?22082
steve ve6wz.
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
On
> Behalf Of John E. Cleeve
> Sent: November 4, 2007 5:14 AM
> To: amps@contesting.com
> Subject: [Amps] Blocking capacity identity?
>
> Following the blocking capacitor thread, I wonder if any one can
specify
> the
> RF current capability of a large ceramic disc capacitor that I have.
The
> ceramic form colour is light brown, the dimensions are 3 inches in
> diameter,
> and 0.75 inches thick. The metal disc on either side is 2.25 inches in
> diameter, and silver plated. The fixing is by a 2BA threaded hole at
the
> centre of each disc. There is no manufacturers name (but possibly
> Plessey),
> but there is a cat/part number printed on the edge of the ceramic
form,
> which is 110-0551, the capacity is printed as 2000pf + 40-20%, the
voltage
> rating is 12kv, another number, 612, is shown adjacent to the voltage
> rating. The original source of this component was KW Electronics in
the
> UK,
> and it was used in their commercial transmitter construction. I
purchased
> the capacitor as a "useful" component many years ago, when they had
their
> closing down sale. I would be most grateful for any information that
may
> be
> forthcoming...regards, John. G3JVC.
>
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