Since you'll never directly figure out what these are... You might as well
fire them up. If they explode just buy something else. 1" square and 5.5
long sound like there's something inside the epoxy. If you are planning on
building a super power amp, I'd spend the money for the "Right Thing" If
you are putting together a HAM AMP with reasonable power levels you most
likely have very adequate diodes there. I use a lot of 120456's here.
(operating from memory, think that's correct) That's the standard used by
Henry and are also purchasable through RF parts and a lot of other sources.
BOB DD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Steve Katz
Sent: Friday, March 16, 2007 5:13 PM
To: 'Kenneth Grimm'; AMPS
Subject: Re: [Amps] Help IDing DSdc diodes
Normally you'd need a HV curve tracer or a hipot tester or some sort of
current-limited HV tester to determine that. CSdc made a lot of microwave
oven diodes as well as other stuff and the P/Ns were mostly OEM custom
"unique" P/Ns that weren't in any catalog, but were traceable back to a
customer and application.
I'd suggest measuring Vf from a low voltage source but while that will tell
you approximately how many junctions are in series, it won't tell you the
breakdown voltage of those junctions.
Another trick I've used on these items is to bring them to my dentist's
office after hours and have them X-rayed to see what's inside. If you see
ten large diodes strung in series, you can probably assume each is at least
600 PRV and you'd have a 6kV or better stack. No guarantees, but "looking
inside" can be revealing, and the dental X-ray is usually powerful enough to
take a shot.
WB2WIK/6
-----Original Message-----
From: Kenneth Grimm [mailto:kdgrimm@comcast.net]
Sent: Friday, March 16, 2007 1:18 PM
To: AMPS
Subject: [Amps] Help IDing DSdc diodes
I've got a set of four epoxy block diodes that I would like to use in
my next home brew amplifier power supply. The problem is that the
company that made them, CSdc (Conditioning Semiconductor Devices
Corporation) was bought up back in the 80's and I can't find anything
on the web about the value of the devices. I would sure like to know
what C67-6225A by CSdc is. They are 1 inch square by 5.5 inches long
black epoxy blocks. Any help would be greatly appreciated.
Thanks,
--
Ken K4XL
k4xl@arrl.net
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