PDP-11/44 want list

From: Ken Kirkby <kenacms_at_ngatoro.terrigal.net.au>
Date: Fri Nov 7 16:05:27 2003

>
> John
> On Tue Oct 8 20:11:58 2002, you posted about your 11/44.
> I was searching for help with the H7140 power supply when
> I came across your post. I recently tried to power up
> a system I got a couple years ago, and have a flashing 'DC On'
> indicator. I don't know how serious this is, or if I might
> be able to repair/adjust it with some guidance. Suggestions?
> I have no documentation on the power supply.
>
> Thanks.
>
As other posters have pointed out the PDP11/44 power supply is
lethal. I have had one go up in a very big bang.

However it may not be be the powersupply. It could be a failed
temperature sensor card in the power supply. Its a card generally
on green pcb material with a thermistor on the card. If the thermistor
fails the power supply wont start. But on rereading your post you
it seems more likely as previously advised that one rail is below spec.

Be carefull.

Ken Kirkby Australia.
Received on Fri Nov 07 2003 - 16:05:27 GMT