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4hv.org :: Forums :: General Science and Electronics
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Looking for SMD RF capacitors

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ragnar
Fri Oct 17 2008, 04:40AM Print
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
Hi all,
for my high frequency work, I'm looking for high-voltage surface-mount capacitors for use above 10MHz -- voltages from 500V - 1500V in capacitances of 1nF down to 47pF. I'm guessing that silver-mica is the way to go, but when I look at prices from Digikey, they seem very expensive ($5+ for a single chip capacitor).

Any recommendations on where I might go?
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Wolfram
Fri Oct 17 2008, 09:56AM
Wolfram Registered Member #33 Joined: Sat Feb 04 2006, 01:31PM
Location: Norway
Posts: 971
There are somet ideas for homemade RF mica caps here Link2 , about two thirds down the page. The capacitance is a bit on the low side, but it`s worth a try.


Anders M.
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Dave47
Fri Oct 17 2008, 12:15PM
Dave47 Registered Member #84 Joined: Thu Feb 09 2006, 01:06PM
Location: Dallas, TX
Posts: 47
A cursory examination of Garrett Electronics shows a few cheaper parts that might fit the bill.

Link2

I looked in HV Ceramic section and found this Link2 for $0.45 each (qty 5).

Lead time sucks, though.

David
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