Non-sychronous solid state replacements are avaialble here-

http://www.tubesandmore.com/

in the "Radio parts & restoration" section, p/n P-V2015N

H.

On Fri, 4 Nov 2011 08:17:05 -0700 (PDT), JIMMIE
wrote:

I came by what appears to be a power supply module from some old
military gear. It uses a synchronous vibrator unless my analysis of
the circuit it way off. My plan is to build a circuit to replace the
vibrator with a couple of power FETs driven by a 555 osc and a bridge
rectfier to handle rectification of the output. I was wondering if
there were any circuit designs around before I started to reinvent the
wheel. Also what freqency do they use. Seems like I heard 100Hz at one
time but I dont trust my memory on something I learned 40 years ago.
Any help would be much appreciate.

Jimmie