Running supply voltage of 60/60 - Vs - 120/Neutral

What is the output voltage of the xfmr with the load connected to it? Is the Sub the only load connected to this xfmr?

Any type of filtering on the output of the xfmr? Did you ground one leg of the output of the xfmr? Creating a grounded conductor. I hope so, for safety. If not try that and see if it makes any difference. On your duplex outlets the silver color term is for the grounded conductor as you know. Just for the heck of it make the grounded conductor term #5 of the secondary on the xfmr. Basically you have created a new AC electrical power system and as such you need to make it a 120V grounded AC system. That is why one output lead of the xfmr is bonded to earth ground. This new ground point you have created is also where the equipment grounds of the receptacles will connect to. If you have a metallic main incoming water line this is were I would go to for the earth ground. Is the plug on the Sub a 3wire grounding type?

Home brew unit
http://cgim.audiogon.com/cgi-bin/vs.pl?vstrt&1120471223&viewitem&o3
Sure looks like a lot going on in there.

I just now noticed you summitted a second post I will need some time to digest it. Especially the grounding system and ground rod.

Where do you live?

Jim

Im in independence, Missouri, about 30 miles east of KC.

I had never thought to gound the #5 terminal,but maybee the #0 or the 0Volt tap,i figured it would short the primary, but i will fuse it low and try it, then that would eliminate the 60/60. but i do run the power after the transformer through the EMI/RFI filter, before it hits the outlet.

And this is just for the sub, i still have one other dual coil transformer im using for the rest of the equipment, but the output on both seam to be a little high, around 126 at low to no load, im not sure what the tube stuff likes best, im sure the sub wont mind.
I have a currently unused variac installed and "was" using it to drop output to around 115, for the amp,tv,xbox etc.

Archangelluke
"Im in independence, Missouri, about 30 miles east of KC."

From your picture I figured you lived in the midwest, USA. The mahogany woodwork and sprayed on lacquer finish is typical for homes in the 60s,70s, and 80s, in the midwest.

You had me confused for a while when you mentioned the electrical service in you home being 240V. Now I know you meant 120/240V.

"I had never thought to ground the #5 terminal,but maybee the #0 or the 0Volt tap,i figured it would short the primary, but i will fuse it low and try it, then that would eliminate the 60/60."

What 60/60??

This is an isolation xfmr. The primary and secondary are not connected electrically. Where as on the other hand, autotransformers are.

Before you do anything in regard to grounding term #5 on the secondary of the xfmr please explain to me your statement about "60/60". I fail to see it, as for the secondary of the xfmr we have been discussing. All I see is a 120 volt floating secondary with no reference to ground.

Jim

60/60 otherwords 60 volts to ground on each leg, but 120 between both legs, as in no neutral, just 60/60 and common ground.

Yes, verry good, the house was built in 1956, but i dont believe it mahogany?

Thanks's for the help, were getting closer to a resolution

Archangelluke
"60/60 otherwords 60 volts to ground on each leg, but 120 between both legs, as in no neutral, just 60/60 and common ground."

The output of your isol xfmr is only 115V if you are using the common term #5 and the tap term #8. The secondary on the xfmr in your picture is a multi tap winding with #5 being one end of the winding and #11 being the other. 170V potential between term#5 and #11.Various taps in between.

A split phase, center tap, winding would be a winding with, say, 120V measured across the total winding and 60V measured from either to the center tap. The center tap is bonded to earth ground. This new grounded point is were any equipment grounds of connected loads would connect to.

Here is some great reading material for you.
http://www.ibiblio.org/obp/electricCircuits/AC/AC_10.html