Ampeg VT-40, THD Yellow Jackets and plate voltage

[danielzink]

Hey All,

While the VT-40 is in the shop getting tuned up - I picked up a set of Yellow Jackets to have some fun with when I get the amp back.

Upon closer inspection I find literature online that reads "for use in an amp that has 520 volts or less plate voltage"

Reasearch has shown that the VT-40 is putting out 565 or so.

What would happen if I used them ? would they fry ? (the El84's that is - or the Yeloow Jackets themselves ?)

I've had one person say

"check into using 7189's instead of 6BQ5's--according to RCA they'll handle more plate voltage, but I'd make sure before firing it up

Anyone here have an opinion ?

Thanks, Dan

[Enzo]

Don't know about that, but your amp guy has the thing ready, and it is FREAKING loud.

[danielzink]

I sold off my old VT-22 before it needed any major service.....

#1 It would've taken both of us to get it into your shop and...

#2 ....now that mother was LOUD !

Thanks Enzo.

Dan

[capnjuan]

Originally Posted by danielzink

...quote re/ 7189s
Thanks, Dan

Unless rescued by JJ or somebody, the 7189 is going the way of the brontosaurus; hard to find and expensive. T'was me, I'd hesitate before messing with something that, on its face, can't take the voltage ... OTOH; there's what a schematic might say and what yours operates at.