Power Supply Unit for a PDP11/45
The power supply for the PDP11/45 consisted of two H7420 power units, each
rated at 1KW. Each unit was prewired for removable regulators according
to the options installed in the system. The items left to right, top to bottom
are :-
- H754 (+20,-5) for core memory, or H745 (-15V, 10A) for peripherals
- H744 (+5v, 25A) for CPU
- H744 (+5v, 25A) for CPU
- H744 (+5v, 25A) for CPU
- H744 (+5v, 25A) for FPU option
- H744 (+5v, 25A) for bipolar memory or H746 (+19.7V, +23.3, -5) for MOS memory options (empty)
- H744 (+5v, 25A) for fastbus memory options
- H744 (+5v, 25A) for fastbus memory options
- H744 (+5v, 25A) for bipolar memory or H746 (+19.7V, +23.3, -5) for MOS memory options
- H745 (-15V, 10A) for peripherals
There are additional +15V supply units built into the transformer housings
(at the far right).
H744 5 volt, 25 amp Regulator Module
