Which el34 power tubes for 20th shiva

[born_hard]

Hi, i bought a used 20th shiva with el34. All tubes are jjs, preamp and power tubes. I dont know if these are original Bogner factory tubes, i guess the seller changed them. Anyway, which are recommended el34 power tubes for the 20th shiva?

 

[Ventura]

JJ are making some fantastic new tubes.
Most new Bogners are shipping with JJ.
Older are ARS (rebranded Chinese/JJ).
JJ are solid.

 

[MetalHeadMike]

Not in the 20th Shiva as mine was a KT88 version, but I've been perfectly happy with the JJ KT77 and those are direct EL34 replacements. Also really happy with the E34L from JJ.