Mistake: 6L6 - L34 - L34 - 6L6 in Mark IV

[A .]

Pair of El34 was placed in two inside sockets.
What is a risk using this incorrect combination when running in Simul-Class?

 

[Bobby Marshall]

Just don't do it.

It was not designed to run EL34's in those positions.

Take care of your Mark IV. Great amp. Wish I never sold mine.

 

[Fronzil]

dude, he's asking what happens when you do it...obviously he knows not to at this point or he wouldn't of made the thread..

 

[A .]

Oh, yes, Mark is great amp!
**********************************
I don't know, how long time it was running 6L6 - L34 - L34 - 6L6.
All power tubes are replaced now.
I wonder, could other elemens be corrupted?

 

[bryan_kilco]

I took my IV to a local "tech" a few years back, they had it for over 3 months, I finally got it back and my tubes were mixmatched like 6L6 - EL34 - 6L7 - EL34.

now....

they didnt fix my problem that I originally sent it in for. Didnt seem to do much of anything except swap my tubes around and charge me $110. and these guys are "techs"?!??!

 

[MrMarkIII]

Pair of El34 was placed in two inside sockets.
What is a risk using this incorrect combination when running in Simul-Class?

"Total protonic reversal." :wink:

 

[zebpedersen]

As far as I'm aware it's the biasing that's the issue - in which case it should damage the tube rather than the amp. I could be wrong, but Boogie usually suggest mismatching stuff is fine and fiddling is encouraged, so I wouldn't worry if you've already done it.

 

[A .]

THANKS THANKS THANKS
Amp works fine, all elements seem OK, my panic is over.

 

[dodger916]

Pair of El34 was placed in two inside sockets.
What is a risk using this incorrect combination when running in Simul-Class?

"Total protonic reversal." :wink:

:lol: :lol: