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Questions about tubes and gear that glows. FAQ

the bias is different...

If the bias is adjusted (grid) then you need to cut back a bit to run EL34 on an amp biased for KT-88s.

If the amp is Cathode Self Bias then you MIGHT be fine depending on the voltage being run on the plates.

I has a Jolida back in the day and did a modification to the (grid) bias adjustment in order to widen the range so I could run either.

Preferred the NOS Amperex EL-34's but others might not agree.



First they came for the dumb-asses
And I did not speak out
Because I was not a dumb-ass


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