E34Ls or 6CA7s safe in Runt 50?

[lukeburke1]

I just got a Runt 50 and I'm loving it as-is, but I may want to try E34Ls or 6CA7s in it at some point. Are these tunes safe to run in the Runt 50, or will they be too much for the screen grid resistors to handle?

 

[lukeburke1]

Bumping in hopes of getting a response

 

[LP Freak]

Yes but as with any new tubes rebias

 

[harsh59]

Doesn't the Runt 50 come with EL34's .

 

[lukeburke1]

Doesn't the Runt 50 come with EL34's .

Yes, but I want to use E34Ls. They're like EL34s with a bit more headroom and bottom end

 

[harsh59]

My understanding is that 6CA7s are the same as EL34s just a different label , like 6L6s and 5881s are the same . I'm not 100% sure though .

 

[fusedbrain]

EL34, E34L, 6CA7, & KT77 all completely interchangeable, but you MUST check / adjust the bias.

For the record, I've got KT77's in my BE100. It's a 2015 so no structure switch.
The KT77's open the amp up a bit and make it feel a little less compressed, and it's a wee bit brighter as well.

 

[lukeburke1]

EL34, E34L, 6CA7, & KT77 all completely interchangeable, but you MUST check / adjust the bias.

For the record, I've got KT77's in my BE100. It's a 2015 so no structure switch.
The KT77's open the amp up a bit and make it feel a little less compressed, and it's a wee bit brighter as well.

I get that, but I what I was asking was if the amp's screen grid resistors could handle them. The Peavey JSX and Triple X were known to not handle E34Ls because they'd fry the SGRS in those amps. I figured the Friedman would have SGRs that could handle it, but I wanted to see if anyone else had tried those tubes in one yet or had looked at the guts and saw the strength of the SGRs

 

[RACKSYSTEMS]

Yeah it's fine no issues

 

[lukeburke1]

Yeah it's fine no issues

Thank you!