[Heathkit] HP23A Power Supply Diodes

[Richard Solomon]

The 1N4007 is a 30 Amp surge  diode, the 1N5408 is a 200 Amp surge diode.

Given the size of those electrolytics, and corresponding turn-on surge, I
would spend the extra few pennies and get the bigger ones.

JMHO,

73, Dick, W1KSZ
________________________________
From: heathkit-bounces at mailman.qth.net <heathkit-bounces at mailman.qth.net> on behalf of David Thorne <thornedw at gmail.com>
Sent: Monday, October 26, 2020 9:53 AM
To: heathkit at mailman.qth.net <heathkit at mailman.qth.net>
Subject: Re: [Heathkit] HP23A Power Supply Diodes

Jim,
Perhaps you already have this but if not it will be helpful, although it
recommends different diodes than does Jim Shorney, NU0C:
http://www.rdfproducts.com/vr_apl_001.pdf

Dave
K7KTB
-----Original Message-----
From: heathkit-bounces at mailman.qth.net
[mailto:heathkit-bounces at mailman.qth.net] On Behalf Of Jim Shorney
Sent: Sunday, October 25, 2020 11:20 AM
To: heathkit at mailman.qth.net
Subject: Re: [Heathkit] HP23A Power Supply Diodes


Go with 1N5408. You will likely never need to replace them again.

73

-Jim
NU0C


On Sun, 25 Oct 2020 14:12:53 -0400
Jim <jim at w1jt.net> wrote:

> Hello all,
>
> I came across an old HP23A that was in really bad shape.   It was
> literally covered in mud.  I don't know how  that happens but I guess
> it does.
>
> Anyway, I thoroughly cleaned it, completely disassembled it and now
> I'm in the process of rebuilding it.
>
> The parts list calls for 7 silicon diodes.   It doesn't however, give
> any specifications.   I'm wondering if any of you fine folks know what
> diodes I should purchase?
>
> Thanks in advance.
>
> Jim W1JT
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