Jim, it wud probably be pretty tuff to get exact replacements.
Generics wud be better anyway. You need to see if there is any
voltage doubling done here, in the supply. You really need to
measure supply voltage at the diodes. Then its just a matter of
voltage rating. The current-250 ma. is not going to be a major
factor. I know you don't want to do it, but a few
1000v diodes in series in each leg will be a lot more reliable.
Russ.
From: "WILHITE, JIM" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: "AM Radio Discussion list" <[email protected]>
Subject: Re: [AMRadio] Diode information
Date: Sat, 20 Jul 2002 11:16:59 -0600
Thanks for the response Russ. Unfortunately I don't have the diagram of
this particular installation and remembering the plate voltage falls into
the catagory of wife's & kid's birthday, anniversary and such. The tube
probably had 2000 or so volts on the plate and specs said 250 mils. It has
been about 20 years since I worked on one of these and I just can't
remember. But considering max plate voltage of 2000 and current of 250
mils for the application they were in, they must be rated on up there.
Don't really want to build up 1N4007s in this particular project. I will
look for some 1N2637s, they would look better but will do the 1N4007s if I
have to.
TNX & 73
Jim de W5JPW
Sorry Jim, nothing specific on those diodes. Do you have a schematic?
Easy enuf to figure value of replacements- Do you know how much
B+ voltage there is? And the final plate current? You can guess
from there, as for diode values.
Just use general purpose replacements. I will detail more if you
need? Russ.
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