way too high AC voltage

[pinkmarkos]

hey guys- i've been messing around with different style preamps on an express type power supply. I haven't touched the power end or replaced the PT, but I noticed that I am now getting over 900 VAC pre-rectified which is translating into about 580VDC on the plates of my power tubes and increasing my other B+ voltages respectively. the wall voltage is 122 VAC. My PT is running cool, no redplating, and the bias supply seems to be fine. I am stumped. Any ideas? Thanks

[Structo]

Check your grounds and transformer center taps.

[mbeldyga]

Which power tranny you use?
You sure your DMM isn't broken?
Have you grounded transformer CT/one side of bridge?
You measure your voltages with tube inserted?

[pinkmarkos]

The PT is a Heyboer 11410 that I bought from Toneslut a while ago and I don't remember the exact specs, but it is for an express. My DMMs are measuring differently- one is measuring 185 VAC from the wall, the other is getting 158 VAC from the wall- maybe time for a new DMM.
Grounds all seem to be OK though. Guess I'll have to investigate further. Thanks guys

[dynaman]

Try a new battery in your meter.

[David Root]

+1 on that, ain't no way for 158VAC from the wall, never mind 185V!

[Structo]

Maybe he has a voltage doubler inside the wall.

[passfan]

+1 on that, ain't no way for 158VAC from the wall, never mind 185V!

Well there is... but it means really bad shit has happened to your service and other stuff is burning up in your house.

[pinkmarkos]

no fried appliances new battery in the DMM and i'm getting normal voltages again. thanks guys