BK Butler - (rackmount) Tubedriver

tip142 · Post by **tip142** » 06 Oct 2012, 13:08

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 ?

Dirk_Hendrik · Post by **Dirk_Hendrik** » 06 Oct 2012, 18:40

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.

tip142 · Post by **tip142** » 06 Oct 2012, 19:25

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

tip142 · Post by **tip142** » 06 Oct 2012, 19:36

Here one gut of the inside-

Dirk_Hendrik · Post by **Dirk_Hendrik** » 07 Oct 2012, 10:55

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.

tip142 · Post by **tip142** » 07 Oct 2012, 18:49

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

mozwell · Post by **mozwell** » 10 Oct 2012, 02:44

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

tip142 · Post by **tip142** » 10 Oct 2012, 18:29

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.........

ppluis0 · Post by **ppluis0** » 10 Oct 2012, 21:59

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

tip142 · Post by **tip142** » 11 Oct 2012, 13:01

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

ppluis0 · Post by **ppluis0** » 11 Oct 2012, 22:56

tip142 wrote:Where did you find?

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

Cheers,
Jose

DrNomis · Post by **DrNomis** » 12 Oct 2012, 05:43

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

okgb · Post by **okgb** » 12 Oct 2012, 12:15

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

tip142 · Post by **tip142** » 12 Oct 2012, 18:16

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.

ppluis0 · Post by **ppluis0** » 12 Oct 2012, 18:47

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

tip142 · Post by **tip142** » 17 Oct 2012, 22:38

For this great community:

imaradiostar · Post by **imaradiostar** » 18 Oct 2012, 06:22

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

Post by **modman** » 20 Nov 2012, 08:37

--moved from requests section---

Dirk_Hendrik · Post by **Dirk_Hendrik** » 20 Nov 2012, 11:54

Thank you gentlemen! Highly appriciated!

BK Butler - (rackmount) Tubedriver [traced]