[time-nuts] Varian 921-0062 ion pump supply question

[cdelect at juno.com]

Here is the deal.

The 4 terminal TX wiring is pretty obvious. (I have a unit with the 4
terminal to compare with)

The 6 terminal I have ohmed out and it is not obvious!

Pins 1 to 3 and 2 to 4 (.5 Ohms) appear to be the 120VAC windings and
hooking them in parallel should do the trick.

As wired for 240 VAC 1 to 3 and 2 to 4 are in series which makes sense.

However when the 4 terminal is wired for 240VAC a wire comes off the
input center tap to provide 120VAC to some circuits in the unit.

The 6 terminal when wired for 240VAC has an extra wire connected to pin
8.

Pin 8 to 1 and pin 9 to 2 show .2 Ohms so they look like maybe taps for a
different input voltage slightly different from 120VAC.

The problem there is that the wire to pin 8 which would logically go to
the center tap as above goes to this pin 8 tap which makes no sense!

Of course it could have been miswired when I got it!

All the manuals I can find by Goggling show the 4 pin TX!

Was hoping someone might have a unit with the 6 pin TX wired for 120VAC
so they could advise me!

Thanks,

Corby