7 Jan
2015
7 Jan
'15
11:58 p.m.
I think it is the Crowbar to... The voltage when it is fireingis adjustable. One time if i
want to adjust 5V i adjusted the crowbar to less 5V ... And bang! 20A was blown...
Am 08.01.2015 um 04:10 schrieb Al Kossow <aek at
bitsavers.org>:
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)