As promised here is the schematic of the early tube driver traced from the guts posted on this thread.
The most significant differences compared to the new RI edition are:
---> R14: On the new RI version it increased from 2,2k to 22k. Several people reported that the tone stack reacted different on the new version vs. the old one. This value change is the reason.
Maybe 2,2k works better when one rolls off both the Bass and High a la Eric Johnson??
---> R7,R8: From the pictures the plate resistors look like 6,8k. I was expecting 47k here. Was this unit moded for lower gain tubes? "Tube Driver" can you please measure the bias voltage in both R7 and R8?
---> R12: increased from 10k to 22k in the new RI Edition. This gives more gain/less headroom.
---> C3: Was not identified on the guts pictures. I'm guessing its value is 120pf. "Tuberiver" can you confirm this?
The new RI version is better than the old one regarding PWR Supply, noise etc.. But i would maybe change R14 and R12 to the old values and listen what happens.
If anyone there has one of this early tube drivers please post the guts. I want to check the values of R7, R8, R12, R14, C3 on other units.
With the files that i attach here is very easy to find the components on the PCB.