You need to know the ripple current rating. SCR commutation capacitors have the
sort of ratings you need.
There are a lot of physically small, high capacity (20+mFd) caps at 2.5 or 3kV
around meant for defibrillators: they MIGHT be OK in a choke input supply where
the capacitor ripple current is reduced compared with a capacitor input filter.
They have proved to be totally inadequate in capacitor input HV supplies for
linear amps - especially in contests where the operation is /P and no on-site
repair (i.e. Murphy is on overtime)is practicable!
73
Peter G3RZP
========================================
Message Received: Jan 09 2014, 06:49 PM
From: radio@modesgate.com
To: amps@contesting.com
Cc:
Subject: [Amps] Russian HV Supply Capacitors
To the un-initiated, these look like an elegant solution to my HV
smoothing capacitor requirement. Perhaps too elegant a solution. Am I
missing something? If anyone has an opinion, or direct experience of
using these, commentary would be appreciated.
http://www.ebay.com/itm/60uF-4kV-6kV-HIGH-VOLTAGE-CAPACITORS-New-Lot-of-2pcs-hv-plasma-laser-tesla-/201017069009?pt=US_Ham_Radio_Amplifiers&hash=item2ecd8d0dd1
If they are any good, any info on cheaper sources (or any for sale in the
UK) would also be good.
73
Denis MW0CBC / GW8OQV
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