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What is the best tube for a Conrad Johnson

Hello

I have an older Conrad johnson permier 4 power amp in exellent condition running the top end of a set of infility RS-1b's. They have 7 emims and 4 emits per side. They are ribbon drivers. I want to retube it and would like an idea what EL34 power tube would sound nicer on my speakers. One other question is how do ruby tubes sound.

Thanks
Darin
darinkperih
darinkperih OP
8 posts
 
Hello

I replaced all my tubes with 8 Svetlanas(EL-34's)and new 5751/6Cg7 tubes. The amp deffinetly sounds much better.

I have one more question, I see in adds that poeple say that you con switch from EL-34's to 6550's or KT-88's on this amp. This amp has a bias conlrole for every output tube. So is it as simple as changing the tubes and resetting the bias. If it is, what is the benifet. (more power or better sound??????)

Thanks
Darin
elevick
2,636 posts
 
Ask CJ before you bother. They are quite particular. I don't think it will be worth the money.
nguyenchiro
92 posts
 
Try to find the NOS EL34 Telefunkens (very rare and expensive- $100.00 per tube). Test of they are the best of the best. Good luck.
ed_sawyer
588 posts
 
I have a pair of NOS EL34 teles. the rare(r) type with the small wings on each plate. Feel free to email if interested. $100/ea is a steal for real NOS West german teles. (not RFT, etc.), and these will be more than that. Factory matched pair w/orig boxes btw.

-Ed
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