On Monday, October 13, 2003, at 02:56 PM, PAUL HEWITT wrote:
Hi Norman
You didn't spec a frequency. This may get you close,
http://www.rfparts.com/caps.html#doorknob Or e-mail HEC at the link
on this
page http://www.highenergycorp.com/ceramic/rftransmit.html I don't
see the
ht-50's listed anymore. Probably not a good choice below 5mhz at legal
limit, not a very good temp-co number available either.
• Good point. In my experiences, doorknob caps of up to 200pF are
usually temp-stable, and those above 200pF are not. In commercial
amplifiers, for tank padders, one sees banks of c. 100pF units mounted
between parallel Al plates. Need a 1600pF Load padder for 160m?
A 4 by 4 square of 100pF units will do the job. However - for
coupling and RF bypass applications the unstable type works well.
73, Paul
PAUL HEWITT
WD7S PRODUCTIONS
QRO HOMEBREW COMPONENTS
http://wd7s.home.att.net
-----Original Message-----
From: amps-bounces@contesting.com
[mailto:amps-bounces@contesting.com]On
Behalf Of Norman Hockler
Sent: Sunday, October 12, 2003 12:02 PM
To: amps@contesting.com
Subject: [Amps] AMP RATING FOR HEC CERAMIC CAPS
Hello Amp builders
Looking for the amp rating for HEC HT50 700pf @ 7.5kv.
Want to run 2 in parallel for blocking C on single 8877.
Cant find data on the Internet.
Thanks.
Norman N8NH
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Rich Measures, AG6K, 805.386.3734. www.somis.org/
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