From: Manfred Mornhinweg <manfred@ludens.cl>
I have the same problem right now, only that I have it at least 18
times. I'm looking for capacitors suitable for a set of legal-limit low
pass filters. That requires capacitors of roughly 100 to 2000pF, each of
them able to withstand AT LEAST 500V and 10A. Preferably some more, to
have a better safety factor for high SWR situations. Can anybody point
me to good sources of such capacitors? Everything I have found is either
unsuitable, or unspecified and thus risky to use, or extremely expensive.
Hi Manfred. You've been quiet for a while. I've mentioned a UK supplier
before, but for others here it is
http://www.charcroft.com/pdf/tab_silver_mica_capacitors/SBH-Dipped-Radial-datasheet.pdf
You can buy online here
http://www.charcroft.com/ebuy/shopdisplayproducts.asp?id=24&cat=RADIAL+DIPPED+SILVER+MICAS
but at around $4.50 US each plus shipping and customs it is going to be
expensive, although perhaps only 20-25% the cost of ATC ceramics. These
parts are intended for transmitting use and are specified for both
current and voltage but sadly not for ESR.
I've seen these capacitors fail with wildly excessive voltage but they
seem to hold up OK to over-current abuse so long as there is some
airflow over them.
73, Alan G3XAQ
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