11/34 sanity check

Don North north at alum.mit.edu
Sun Apr 26 02:32:12 CDT 2015

On 4/25/2015 7:34 PM, Josh Dersch wrote:
> On 4/25/15 1:09 PM, Paul Anderson wrote:
>> I only have time to glance at this now, but if you said -5, + 20 vdc, isn't
>> that a H754 ? that sounds like a core regulator. The H745 is for mos. Am I
>> not awake yet and I missed something?
> There's both a 754 (-5V, +20V) and a 745 (+15V) supply in this thing.  When I 
> acquired the machine (which had long since been decommissioned, it was 
> equipped with 128KW of MOS memory, I assume this is how it had been used so I 
> hope everything's kosher...

The 754 -5V/+20V regulator is only used for the core memory subsystem (like an 
MM11-D board set) for the 11/04 or 11/34.
You can leave it or pull it, it won't matter in your configuration.

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