Replacement for QP1008 (HP9816 PSU)
dr.emiel at xs4all.nl
Tue Apr 15 03:43:28 CDT 2008
Based on the specs placed on the board 5V/6A +14/1.6A -14/0.5A and a assumed
~80% efficiency, simple power calculation give (30W + 22,4W + 7W)/0.8 =
74,25 say 75-80W.
So I think I'll use one of the supposed replacements.
----- Original Message -----
From: "Brent Hilpert" <hilpert at cs.ubc.ca>
To: <General at priv-edtnaa03.telusplanet.net>;
"Discussion at priv-edtnaa03.telusplanet.net :On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Tuesday, April 15, 2008 11:05 AM
Subject: Re: Replacement for QP1008 (HP9816 PSU)
> Rik wrote:
>> Sorry, I need to replace both and ment that the 2n2222 isn't a problem,
>> the QP1008 is.
>> The PSU isn't build by HP but by RTE POWER/MATE a firm with doesn't exist
>> any more.
>> The text on the QP1008 (TO3) is QP1008 and the date stamp 8413 and the
>> Motorola sign.
>> I do have a Motorola component cataloge from '83 but can't find the part
>> there and in my other books.
>> On the schematics of Tony the part is mentioned as QP1008
>> I need to know witch transistor I can use to replace it.
> A line of speculation, FWIW:
> 1. Looking through the cross-refs of the 1984 Moto Bipolar Power
> Transistor and
> Thyristor databook, the only part I spot with a number portion of 1008 is
> UMT1008. Yes, that's a speculative and questionable association in-and-of
> itself, but sometimes house or custom-request numbers bear some
> from the common part number.
> 2. The "Motorola Similar Replacement" for UMT1008 is MJ13014.
> 3. Basic specs on the MJ13014:
> "Switchmode Series NPN Silicon Power Transistor"
> "..designed for high-voltage, high-speed, power-switching in inductive
> circuits where fall-time is critical.."
> "..particularly suited for switchmode applications such as: switching
> regulators, inverters.. [etc]"
> TO-3 package
> VCEO: 350V
> IC: 10A
> Pd @ 25C: 150W
> hfe: 12 min
> 60nS inductive fall time @ 25C
> 800nS inductive storage time @ 25C
> Perhaps Moto was asked to supply something that
> looked-like/similar-to/spec'ed-version-of a UMT1008.
> The basic specs would suggest it passes a sniff test, but I'm not familiar
> the actual power supply so I'll leave it to others to perhaps comment on
> applicability in the specific.
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