The best way to test unknown diodes: Attatch welding leads&strike an
arc....If you can weld without blowing them up,you have adequate current
handling for the BIG one...PS:don`t touch what your`e trying to weld! How`s
that Bob? Jim..
----- Original Message -----
From: "Robert Bonner" <rbonner@qro.com>
To: "'Kenneth Grimm'" <kdgrimm@comcast.net>; "'AMPS'" <amps@contesting.com>
Sent: Friday, March 16, 2007 3:54 PM
Subject: Re: [Amps] Help IDing DSdc diodes
> 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
>
> *** BoatAnchor Manual Archive ***
> On the web at http://bama.sbc.edu and http://bama.edebris.com
> FTP site info: bama.sbc.edu login: anonymous p/w: youremailadr
>
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