Air Tight ATM-1

Does anyone out there know what to bias the EL-34 tubes to? I used to have an English translation, but lost it somehow (Idiot). At any rate, I need to rebias these tubes and have no idea what to do.
Thanks in advance,

You can ask your question on the Air Tight Owners group :

i have a copy of the airtight service manual for atm-1 atm-2 and atc-1. if you would like a copy i will make it for you thanks john barnes at audio unlimited 303 691 3407 usa
If your offer still stands, I am very much interested in a copy as I'll be installing new EL34s in an ATM-1 shortly.