VTL small signal tubes upgrades.

I currently own VTL MB100.
It has 12AT7 Phillips tubes.
What will be the reasonable upgrade since I'll need to change them very soon.
contact Lorenz at wiwitubes.com
He will be able to give you some suggestions. Large tube dealer.
Mullards - available from the Parts Connection, on sale until October 31.
Samuel Johnston
P.S. They meet spec which is more than I can say for the Pentas that Luke Manely uses.
I use a NOS telefunken 12AT7 on my VTL mono block 125'S sound great. I also would look at the mullards NOS I also use these tubes in my VTL . I think these are the best choice for this amp.