VAXmate PSU fixed, but no video

Mattis Lind mattislind at gmail.com
Sat Apr 18 09:36:18 CDT 2020


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> One approach to testing flyback transformers seems to be to use a circuit
> that causes them to ring and observing whether the ringing is damped by
> shorted turns.  I've never got around to trying this myself.
>
>
I have a VT100 that failed with some smoke coming out of the center of the
transformer coil. I tried the ringing test. Here are my results:
http://www.datormuseum.se/peripherals/terminals/vt100

/Mattis


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