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
It is too bad that you can't e-mail other Audiogon members anymore. My old friend Trelja could tell you about biasing EL-34s in a Jadis Orchestra Reference. BTW he did the same thing but swapped out the then standard KT-90s and loved the improvement.
I bought a used DA-60 with a mixed bunch of shot EL-34s in it and went the opposite way and put in the GL KT-88s which I though were much much better. It is time to retube and since I like a "big" sound I think I will try the GL KT-77s.
I was hoping Trelja would have spotted this thread.
I still have the GL kt88, which sound great. I actually am trying el34 based on Trelja's posts.
The official bias settings for whatever tubes you use in the JOR are 90 - 120 mV, with 110 mV considered the preferred target.

As you noticed, at 10 mV, there is hardly any current flowing through the tube, and to draw an analogy with water, the valve (as the British call them, and a better and more meaningful name) is just about fully shut.

I like both the KT88 and EL34 in the JOR, but my preference is the latter. Of course, your tastes may differ.

Was hoping to see you in NYC, Doctor. Had a great time at the show. As you said, this new world of not being able to contact people makes things hard on everyone.
Thanks Trelja. That's what the manual stated but I just wanted to hear your thoughts since there was such a large difference in readings.
I am trying Mullards (new) because there was no JJ's that I could get my hands on immediately. I have about 12 hours on them so far. The bass is much softer than the kt88. I am not as concerned about that right now, but I am anxious the have the holographic sound stage back. I was wondering if the JJ's took very long to bloom. I also installed a pair of Tungsol 12ax7's at the same time, so I may be overly anxious to hear the same quality that I have been getting.
Joe do you still have the same e-mail I have been meaning to get in touch with you and perhaps visit. I have a lot to tell you about. My old e-mail will work if you want to try first. You know Micheal/Sufentil reached out a while back but I was terribly remiss in not answering, again a story with that. I seem have gotten disconnected from the PAAG. I know you aren't following them but If I had been in touch I would have made the New York Show.... I really should have gone to meet the industry people, I would love to get involved on that level.