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Jadis OR bias value for Mullard RL34 and KT88 help

I just swapped my Gold Lion (reissue) KT88 tubes for Mullard EL34's and was vwery surprised that the volume was so much lower. I checked the bias and found it to be less than 10mv while the KT88's had been biased at 110mv.
I rebiased the EL34's up to 90mv and the volume increased to what seemed to be "normal".
I am looking for the correct voltage to bias the new EL34 to in a Jadis Orchestra Reference.
Any help is appreciated.
128x128mattzack2
mattzack2's avatar
mattzack2 OP
175 posts
 
Understood
Are you the same Joe as your friend in the business by any chance?
trelja
3,224 posts
 
No, I think that is Joe Abrams of Equus Audio. I remember his banner ads here on Audiogon.

Please let us know how the amp sounds at 150 mV, and whether you feel the Mullard EL34 should stay.
mattzack2's avatar
mattzack2 OP
175 posts
 
I plan on doing that this weekend. I will keep you posted. I wish I had a quad of jjel34's to compare.
trelja
3,224 posts
 
The JJ that I liked in this amp are the E34L, which do have a much different sound than their EL34.

The JJ EL34 is more typical of EL34 sound, with an evenness of hand from top to bottom. The E34L give up some of the bottom end for a midrange that can be otherworldly in the right setup.
mattzack2's avatar
mattzack2 OP
175 posts
 
i AM GOING TO TRY THEM.
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