PDP 11/84 PSU wiring / differences

From: Ed Kelleher <Pres_at_macro-inc.com>
Date: Sat Aug 21 17:44:58 2004

At 06:15 PM 8/21/2004, you wrote:
>The rightmost one
>is identical to the left, but with the addition of a second vertical
>board inside, and also runs the blower fan at the front of the machine.
>Is it just that it provides voltages other than +5V to the system?

The spare board might be a temperature controller for the fan.
I've seen these in later model BA23 boxes.

Ed
Received on Sat Aug 21 2004 - 17:44:58 BST