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List:       classiccmp
Subject:    [cctalk] Re: PDP 11/40 power supply question
From:       Bill Degnan via cctalk <cctalk () classiccmp ! org>
Date:       2023-10-22 13:08:54
Message-ID: CABGJBudDXJ3tnvJpzYoby6GhkM0tJDYG09SqXzxkoffXnpHy6Q () mail ! gmail ! com
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Power 15 vs 20 is detailed in the hardware manual  when to use which

On Sun, Oct 22, 2023, 4:27 AM Chris Zach via cctalk <cctalk@classiccmp.org>
wrote:

>  >
> https://vintagecomputer.net/digital/PDP11-40/PDP11-40_DC-pwr-supplies.jpg
>
> That brings up a question that's rattled around my mind: On a 745 it's
> rated to supply -15 volts at 10a, but it has two of the lines designated
> as "+15 in". Where did the +15 come from, the other supplies put out
> +20, +5, and -5?
>
> Or does it put out +15 and -15 from the 20 volt AC input?
>
> C
>

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