[GreenKeys] got original M19 power supply working

[epvgk at limpoc.com]

When I got my model 19 earlier this year it came complete with the 
gigantic REC30 rectifier box. It uses a pair of 323B thyratrons to 
rectify and regulate DC for the local loop and the punch magnet. 
One of the thyratrons was bad so I made a substitute power supply
to operate it. After a number of attempts I managed to get a pair
of working NOS 323Bs and let them cook for a while, and now the 
full light show is now in force with the thyratrons and neon lamp 
voltage ref: 

https://www.youtube.com/watch?v=fxy2Ifo8Xx0

eric