What is this powertube and should it be in a Mark III?

[Dave L]

Hi guys, I´m looking at a simulclass Mark III and noticed this is what´s in the inner pair of tubes. I don´t think I´ve ever seen anything except EL34s and 6L6s in a Mark and this looks maybe like a 6550, which raises the question what the Boogie biasing can handle.

 

[TX6Strings]

Based off shape it could be a Gold Lion KT88 or Tung Sol 6L6. I’d ask the seller. If he’s not 100% probably go ahead and replace them

 

[kurtsstuff2003]

Chinese 6l6

 

[napalmdeath]

Based off shape it could be a Gold Lion KT88 or Tung Sol 6L6. I’d ask the seller. If he’s not 100% probably go ahead and replace them

I'd say it's definitely not Tungsol, since it's made in China.

I've seen coke bottle 6L6's like these made by Shuguang, but not in recent years.

 

[TX6Strings]

I'd say it's definitely not Tungsol, since it's made in China.

I've seen coke bottle 6L6's like these made by Shuguang, but not in recent years.

Ops my bad…missed the MIC. Yeah definitely not Tung Sol then.

 

[napalmdeath]

When in doubt, take 'em out!