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Hi,does anybody have schematic ,i' ve only see guts of an open rack...and see 2 valves inside.Don't know the model.
I'm very curius is simple starved ?Like the other pedal.
Or conventional H.T ?

The Chandler Rack version is my site. It has been there for a few years.
http://www.dirk-hendrik.com/temp/Chandl ... r_Rack.pdf

Hape that helps.

Hi,thank you for reply great pleasure to meet you;the schematic you have does not match what i see...
Look here -
The are 2 (probably) 12Ax7.....
This is my afternoon research:
Is Real Tube II------ Rt -922 design by BK Butler

Here one gut of the inside-

That's a different beast indeed. In the same sloppy workmanship style always seen from Tube Works.

I would need to have it on my bench to trace it. Pretty hard to do from photo's. Shame. Sounds a lot better (in that YT clip) than the single tube tubedrivers.

I'm with you,it seems that this version is a bit different from the standard creatures of Mr.Bk Butler.
What say?

one of these may be what you want
edit - these are the single tube ones, so not what you are after

Well,thank you for sharing this schematics;is good having it under our Forum.
Is seems the ,that model is a little obscure for the schem.........

Hi tip142,

Perhaps the schematic of the rack unit that you're asking for has more to do with this diagram: https://www.diystompboxes.com/pedals/sc ... ee_v12.gif



Is an all tube pedal that runs on slightly higher supply voltage, and employ a couple of tubes instead the usual dual operational and a single 12AX7.



Enjoy,
Jose

Ah!Thank you very much;doesn't ever see before;looking wonderful.
Where did you find?
Anyway a little gem....

tip142 wrote:Where did you find?

This images were picked in the web. Personally I never seen one of these units.

Cheers,
Jose

How hard would it be to clone one of those Mini Boogees?.......

Hey , that two tube , butler is not just a two channel version , two real tubes put together ?

Well, there is no H.T. present,in the typical range of 280-300 V DC;this is the first reason for considering this effect quite safe;here we are dealing with a secondary voltage in the range that is under 24 v......
In second instance, i don't see anything critical particulary difficulties for build these effects,who differ from standard building.

The only change I would make would be to increase the value of the first capacitor filter as it has to cover the consumption of the heaters. Maybe 2200 uF would be appropriate.

There is nothing uncommon in the components values or types and also low voltage capacitors can be employed.

Then the only critical parts are the two sockets for vacuum tubes, which usually we get on ebay.

Cheers,
Jose

For this great community:

I have this unit and love it. Had this and an early 4 knob TD with the single sided board, kept the rack unit and sold the 4 knob version. Mine is the black one.

Jamie

--moved from requests section---

Thank you gentlemen! Highly appriciated!