RE: Static PET PSU questions

From: M H Stein <>
Date: Fri, 2 Oct 2009 14:04:01 -0400
Message-ID: <01CA4369.34C78B00@MSE_D03>
Ah, thanks for that; it sure sounded like a discrepancy between the PET
and display frequencies but I'd always assumed the 9" models all used 
the same displays. Live and learn (not to make assumptions ;-).


From: 	William Levak[]
Sent: 	Friday, October 02, 2009 1:37 AM
To: 	cbm-hackers
Subject: 	Re: Static PET PSU questions

On Wed, 30 Sep 2009, Ethan Dicks wrote:

> Hi, All,
> Back on that 2001-8 board... it's a P/N 320008, original board.  It
> has a 5-pin power supply connector.  From the schematics, pin 3 is
> GND, pin 2 is unreg 9VDC, and there's a pair of half-wave diodes from
> pins 1 and 5 to pin 4.  I want to run this board in a more modern PET
> chassis

You don't sat what you mean by "more modern PET".   The video display 
circuitry is not compatible with "dynamic PET" versions.  For one thing, 
the display operates at a different frequency.
SDF Public Access UNIX System -

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Received on 2009-10-02 19:00:04

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