Broken H724 power supply from PDP-8/e

Al Kossow aek at
Wed Jan 7 21:10:33 CST 2015

On 1/7/15 6:24 PM, Michael Thompson wrote:
> The H724 power supply in my PDP-8/e works OK for about 5 seconds and then
> the +5V output goes to about 3.0V. If I leave it on for a few more seconds
> it will blow the 20A fuse for the +5V output.

sounds like something is firing the crowbar (Q207)

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