Chandler - Tube Driver (rack version)  [schematic]

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Chandler - Tube Driver (rack version)

Postby DahakaNishoba » 03 Oct 2009, 00:19

Ok I got a RACK VERSION of a rev1 chandler tube driver...BUT...this has been modified by the previous owner

He's an acoustic guitar master and used this ONLY as a preamp...so asked a tech to modify this to REMOVE any drive or distorte signal
I can provide gutshots of everything inside but its modified so the request is
ANYONE HAS a PCB LAYOUT/PHOTO/ or actually a rack like the one I have...just Open it and give me some info
i cant really see any sign of mod (apart from some "new" resistor or unsoldered holes in the pcb ) but without anything of original ones its really hard to do something

Again i can post pics if anyone is interested...is a rack version with
DRIVE
BIAS
MASTER
CONTOUR
3 EQ
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Re: Chandler RACK Tube Driver (HELP)  [schematic]

Postby Dirk_Hendrik » 03 Oct 2009, 09:13

Photo's? A few shots on the wiring only.

preps this helps:
http://www.dirk-hendrik.com/temp/Chandler_Tubedriver_Rack.pdf
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Re: Chandler RACK Tube Driver (HELP)

Postby DahakaNishoba » 03 Oct 2009, 13:25

ok that was WAY helpful
now I have something to work with.
anyway I just unmounted/unscrewed the pcb pots and jacks....everything seems at his place...even solder joints....seems "original" but the sound is WAY different than an original one... :hmmm:

anyone has a shot of both sides of pcb ? (or even only component side) at least I wanna kno if a pair of unsoldered ground pads are normally empty or theres something wrong
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Re: Chandler RACK Tube Driver (HELP)

Postby Dirk_Hendrik » 03 Oct 2009, 14:31

DahakaNishoba wrote:ok that was WAY helpful
now I have something to work with.
anyway I just unmounted/unscrewed the pcb pots and jacks....everything seems at his place...even solder joints....seems "original" but the sound is WAY different than an original one... :hmmm:

anyone has a shot of both sides of pcb ? (or even only component side) at least I wanna kno if a pair of unsoldered ground pads are normally empty or theres something wrong



I serviced one of these a few weeks ago. (hence the schem) Shoot some pics and I'll tell you more if I can.

Edit; the owner sent me pics prior to shipping the unit:
chandler-1.jpg
chandler-2.jpg
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Re: Chandler RACK Tube Driver (HELP)

Postby Dirk_Hendrik » 03 Oct 2009, 14:39

and now you have all I have ;)

chandler-3.jpg
chandler-4.jpg
chandler-5.jpg
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Re: Chandler RACK Tube Driver (HELP)

Postby DahakaNishoba » 03 Oct 2009, 19:23

Hmmmm huge thanks....ok so there are empty pads even in original one...I can't notice nothing major...just a different transformer (mine seems newer or just in better conditions....will shoot some macro of the inside tomorrow mornin...
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Re: Chandler RACK Tube Driver (HELP)

Postby sadrew » 08 Nov 2011, 11:31

Hi everybody,

I am in the process of making a diy project for this little beast!

I am redrawing Dirk's schematic on Eagle and next step will be making a board layout, obviously available for everyone.

I am asking if someone would be so patient to contribute and give a look to my schematic. I am mostly interested in checking potentiometers orientation, jacks normalling and spotting overall mistakes.

Many thanks in advance
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Re: Chandler RACK Tube Driver (HELP)

Postby sadrew » 08 Nov 2011, 11:36

It seems I can't upload the schematic in the attachments... What's happening?
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Re: Chandler RACK Tube Driver (HELP)

Postby sadrew » 08 Nov 2011, 12:14

Here it is
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Re: Chandler RACK Tube Driver (HELP)

Postby sadrew » 11 Nov 2011, 13:21

come on guys! :roll:
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Re: Baja B K Butler Tube Driver

Postby sssteeve » 09 Dec 2011, 09:55

I was wondering if anyone has a schematic for the Chandler rack mount TDR-101 Tube Driver. It is quite different from the original 4 knob pedal- which I bought in 1986/7 but traded in a year later for the rackmount version. :slap: (I should have gotten suspicious when the store was offering me the full price I had paid for it toward the "new and improved" model... in most cases it would have been 50-70% of what I paid originally.)

I thought that the rackmount version was too harsh so I added a cap or two (somewhere!) to mellow things out. I'm glad to have found the schematics for the original 4 knob floor pedal here- I hope to rewire my rackmount POS as the 4 knob floor pedal. (One good thing about the rackmount version was the boost switch- I may try to incorporate that into the good design.)

Thanks for all of the great information on the Tube Driver!

Steve Ahola

P.S. About 15 years ago I got a box of 3 or 4 broken rackmount TDR-101's from Dan Torres for $10 so now that I have the real schematic I will see what I can do with them! (I just need to remember what I did with that damn box!)
Last edited by lolbou on 09 Dec 2011, 10:08, edited 1 time in total.
Reason: Post moved to Chandler Rack thread : have a little search next time... ;)
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Re: Chandler RACK Tube Driver (HELP)

Postby Bernardduur » 06 Jun 2013, 20:51

@ Dirk; I traced a repair here. Only difference with your unit is R17. That resistor here is only 2k2 (22k in your unit).
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Re: Chandler RACK Tube Driver (HELP)

Postby Vicus » 11 Jun 2013, 12:20

Does some one have the schematic of RT-913? The six knob version.
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Re: Chandler RACK Tube Driver (HELP)

Postby Manfred » 19 Jun 2013, 21:43

Vicus wrote:Does some one have the schematic of RT-913? The six knob version.


Sorry, the RT-922 only.
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Re: Chandler RACK Tube Driver (HELP)

Postby stojanos » 30 Jan 2018, 11:56

sadrew wrote:Here it is

Hi,

Can you send me the eagle schema file that you created ? I would like to build a PCB layout from schema and not from image files that can be found on Baja post. I promise that I will share it here.

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