Elrog 300B vs Takatsuki 300B tubes

Bill and Al,
Good points. I think I'll just wait for my replacement Elrogs from George and go from there. What's the point in having premium tubes and degrading the sound with a variac.
Charles,

I use a PS Audio, P-10 power regenerator for exactly the same reason. The power in my area can range from 117v to 123v depending on the time of day. The P-10 shows you the voltage coming in and the regenerated voltage going to your equipment. It took me a long time to figure out why my system sounded so much different during particular times of day but once I did, it was a game changer.
It's great to know that the Elrogs will be okay in my Franks. Thanks guys!!

George told me today that 122 volts isn't really the limit but with over voltage can easily spike to 125 or higher, which would be a problem.
Sorry if I didn't stress that better.

Joe

I use a Puerpower 1500+ for my whole system with excellent results.
It doesn't restrict dynamics and the sound is much clearer and smoother.
They have a very good product but their customer service isn't the best unfortunately. It's to bad because it really is a great product.

Joe

Joe, thanks for clarifying. It could be a complete coincidence, but I had two different electricians read 122.1 V six months apart. I should probably begin taking my own readings at various times of the day to get a better feel for the range.

Markus, thanks for your comment. I will give this some more thought. Snopro, i've heard the same things several times about Purepower. I don't patronize businesses that don't support their products, no matter how good they may be.