i received an enail from deane last night.
are you sure the tripler is actually defective?
the tripler in the 2235 and similar scopes is quite small so an nte528 tv tripler cant be easily fit in
as in the case of a 465/475
and other scopes.
sometimes sphere in canada has them, there is a firm in greece who has them from time to time too
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----- Original Message -----
From: Kevin John Chadwick
To: TekScopes@...
Sent: Monday, February 05, 2007 6:17 PM
Subject: [TekScopes] Tek 2235 HV Multiplier
Hi All,
Two questions:
Anyone heard from Deane Kidd recently? Is he still answering e-mails
(vacation?).
I am looking for an HV multiplier for a really good 2235. If I cannot
locate one at a reasonable price I would like to build one using
discrete diodes and capacitors (12 kV for HV and -2kv for focus).
Anyone know what is inside the original multiplier circuits? - or has
a scrap 22xx complete with multiplier for sale?
I have checked the archives but can find very little on the 2235
multipliers just lots about 547s. Trying to remove the potting from
the failed unit seems to be just about impossible. The existing HV
multiplier still works but loads down the power supply and prevents
the -8.6 v from getting past -8.3 before the current limiter kicks in.
Presumably the existing multiplier is leaky when the high voltage is
generated.
Thanks for any information.
Kevin C
Ottawa ON
