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Original Message
I have a schematic of a Langevin power supply that used two chokes in an m derived pi filter
Posted by grhughes on May 16, 2012 at 17:37:19:
and OA3 gas tubes as a shunt regulator. It's early 50s vintage and was made for their recording studio mic preamps and pro radio station equipment. Output is about 380 volts. It used two 20H chokes and rather low value oil capacitors. Yes, space is always a problem for me too. I always choose a chassis that is too small. Ray