VT100 and/or VT105 rescued from scrap

Brent Hilpert hilpert at cs.ubc.ca
Wed Oct 21 13:48:55 CDT 2015

On 2015-Oct-21, at 3:19 AM, Rod Smallwood wrote:
> VT 100's have one weak point. The monitor is a bought in part from Ball Bros.
> The Ball supplied drive board burns up a diode and cap.  It will be obvious on inspection of the board.
> I have never been able to get a circuit diagram or I'd do a replacement board.
> Needless to say the DEC parts are mde of sterner stuff

The VT100 FMPS from bitsaver's:
has schematics for two different monitor boards (pages PDF.43 & PDF.58), the first indicated as being from Ball Bros.
Does that cover it?

Dates on the Ball Bros version look like 78, while the other looks like 79.

(Anecdotally: didn't have any problems with the power supply or monitor on the VT278 when it was powered up after many years.)

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