110 Volts Power Supply

[Bruce MacMillan]

Bob, it sounds like you have things in hand.

I wouldn't worry about the 6 pin connector on the psu. There isn't much reference to it's use other than the audio/signalling pins. The pins that have the +12v from the regular battery cable are not connected internally.

Perhaps when the AC psu was developed they thought there was a need to buzz the operator, maybe as part of an intercom system ( or to notify of a brew up).

As to the variac, I use it to avoid the instant on inrush current to the transformer. More important is to keep the ac voltage at 110v max which is a lot lower than most line voltages. It only takes 5-10 seconds to dial the correct voltage. No reason to wait any longer.

Yes, get the tubes tested before applying power. As Chris said if one shorts it can turn a rare psu into a cheap boat anchor.

[Bob Carriere]

So I scored a Hickok TV-7 fully operational and calibrated tube tester.

Now I can't wait for it to get here.

Bob C

[Bruce MacMillan]

Excellent, that' a good tester. I have a "C" version that was made in Canada by Stark. There is very little difference between the various models, A,B,C & D except the "C" model comes with an adapter assy for English valves.

If you haven't already done it you should use the schematic & an ohmmeter to check the continuity of the windings. If one is open there's no use in proceeding further.