hp13a transistors

[Ken Bakhaus]

I have replaced mine with 2N1558 or MPS1558 and they work fine. I don't know
if they are Ger. or Sil. as all my data books are packed away from a move.
Mine originally shorted out because the 800V line arced across the output
connector and carbonized it forever. So I have that line come out on a
separate wire with fuse.  Didn't have any problems with this arrangement but
haven't used it for years either, should probably sell it although I still
have two rigs that would run off it.

Ken,  K8PAO Since 1959

----- Original Message -----
From: Dave Larson <dlarson at BROOKINGS.NET>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Sunday, June 23, 2002 7:26 PM
Subject: hp13a transistors


> Hello Heathkit folks.  I have a hp13a with shorted transistors. Looks like
> they have been replaced before with RCA SK3009 transistors.
> Does anyone know what types should be used as replacements?
> I believe the original parts where germanium transistors. Has anyone
> tried converting this power supply to use silicon transistors?
>
> Thanks
> Dave WB0TSR
>
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