Hi Rick,
I used to come across those in some high-voltage PSUs made by EG&G, we used
them for seismic acoustic sources offshore. I think that they are strings of
diodes and, possibly, snubber resistors but the potting they used is pretty
resistant to solvents or heat, so they're virtually unrepairable, I remember
trying to fix one at sea! The forward resistance should be equivalent to the
number of individual diodes they used, so the normal few ohms you get from a
modern diode would be perhaps ten-fold on the blocks. If they are O/C both
ways,
then at least one diode has bit the dust.
You could simply substitute a chain of something like 1N5408 diodes instead.
73
Roger/G3VKM
Message: 1
Date: Fri, 6 Jun 2008 11:57:17 -0500
From: "Rick Brashear" <[EMAIL PROTECTED]>
Subject: [AMRadio] Diode Blocks
To: "'Discussion of AM Radio in the Amateur Service'"
<amradio@mailman.qth.net>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
Is anyone have reference material to the old Sarkes Tarzian diode blocks?
I
have a couple of these in the Bauer 707 and have no idea if they are good.
I wonder how they can be tested?
Thanks,
Rick/K5IAR
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