BK BUTLER TUBE DRIVER 3 KNOB FOR SALE DRIVERS

But there would have to be some way to approximate the starved tube stages. A number of things could be done with it, so I won't speculate. If dropping the IC1A buffer, it becomes a 2nd gain stage instead. So clipping diodes would either probably be used in its NFB loop, or shunted to ground after it. At 9VDC, IC1B would definitely clip as the gain is increased.

There just would be no 12VDC regulated in and run on the traditional dual rail - it would be the 9V/4.5V/0V single rail setup found in pedals. signal thru the non-inverting input, and all the typical circuit constructs like you would otherwise see.

IC1B could then remain as it is - signal thru the inverting input, or it could be changed to be like a Rat/TS/etc. The marketing to align the thing with the Tube Driver tells me the latter - I don't think Alf would be hip to that IMO. I know Sean certainly would - not sure if he had any input on this. IC1A is just an input buffer, and I could imagine Hermida dumping it altogether. Most other sections are 1:1 with the actual Butler design. Notice that it's been adapted for a single tone control. Something like a Foxx Tone Machine will do that in non-octave mode. I hear what almost sounds like asymmetrical germanium diodes shunted to ground, and pushed in a way to give octave bits to the notes. If you figure that this is an attempt to get the starved plate tube drive pedal effect w/o a tube, the easiest way to do that is with specific types of clipping diodes shunted to ground that will give that quality - it could be a sweep from LED's to germaniums, for example.ДЄnother possibility would be to use the actual Tube Driver SS 'front end' chapter and verse, and then just use some SS equivalent for the tube part, which doesn't behave like a tube in the traditional sense anyway! And Hermida is well aware of this - that's why the Zendrive II used a tube for clipping diodes with the rest of the circuit staying similar to the ZD I. So all that is actually happening is 'slowly and incrementally engaging' another set of clipping diodes. It dawned on me that bias may actually replace a clipping diode toggle with a pot, kind of like what you have with the Fulltone Plimsoul. I doubt very much it actually has anything to do with biasing - it's possibly more of a supply voltage control. There is some marketspeak about an internal bias control. They are implying that it's a Chandler Tube Driver, even though there's no inclusion of a tube in this like with the Zendrive II (and spec's say this thing only draws 10mA). Now look at the beige coloring and the type and style of the lettering. It's being pushed as a pedal that both Billy Gibbons and Eric Johnson would use, and I think there was also mention of David Gilmour as well. With the files that i attach here is very easy to find the components on the PCB. I want to check the values of R7, R8, R12, R14, C3 on other units.

BK BUTLER TUBE DRIVER 3 KNOB FOR SALE DRIVERS

If anyone there has one of this early tube drivers please post the guts. But i would maybe change R14 and R12 to the old values and listen what happens. The new RI version is better than the old one regarding PWR Supply, noise etc. > C3: Was not identified on the guts pictures. > R12: increased from 10k to 22k in the new RI Edition. Was this unit moded for lower gain tubes? 'Tube Driver' can you please measure the bias voltage in both R7 and R8? > R7,R8: From the pictures the plate resistors look like 6,8k. Maybe 2,2k works better when one rolls off both the Bass and High a la Eric Johnson? Several people reported that the tone stack reacted different on the new version vs. > R14: On the new RI version it increased from 2,2k to 22k. The most significant differences compared to the new RI edition are: As promised here is the schematic of the early tube driver traced from the guts posted on this thread.

Bk butler tube driver 3 knob for sale