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Chandler - Tube Driver (rack version)

Posted: 02 Oct 2009, 23:19
by DahakaNishoba
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

Re: Chandler RACK Tube Driver (HELP)  [schematic]

Posted: 03 Oct 2009, 08:13
by Dirk_Hendrik
Photo's? A few shots on the wiring only.

preps this helps:
http://www.dirk-hendrik.com/temp/Chandl ... r_Rack.pdf

Re: Chandler RACK Tube Driver (HELP)

Posted: 03 Oct 2009, 12:25
by DahakaNishoba
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

Re: Chandler RACK Tube Driver (HELP)

Posted: 03 Oct 2009, 13:31
by Dirk_Hendrik
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-1.jpg (55.7 KiB) Viewed 6077 times
chandler-2.jpg
chandler-2.jpg (65.19 KiB) Viewed 6077 times

Re: Chandler RACK Tube Driver (HELP)

Posted: 03 Oct 2009, 13:39
by Dirk_Hendrik
and now you have all I have ;)
chandler-3.jpg
chandler-3.jpg (46.62 KiB) Viewed 6076 times
chandler-4.jpg
chandler-4.jpg (37.92 KiB) Viewed 6076 times
chandler-5.jpg
chandler-5.jpg (39.91 KiB) Viewed 6076 times

Re: Chandler RACK Tube Driver (HELP)

Posted: 03 Oct 2009, 18:23
by DahakaNishoba
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...

Re: Chandler RACK Tube Driver (HELP)

Posted: 08 Nov 2011, 10:31
by sadrew
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

Re: Chandler RACK Tube Driver (HELP)

Posted: 08 Nov 2011, 10:36
by sadrew
It seems I can't upload the schematic in the attachments... What's happening?

Re: Chandler RACK Tube Driver (HELP)

Posted: 08 Nov 2011, 11:14
by sadrew
Here it is

Re: Chandler RACK Tube Driver (HELP)

Posted: 11 Nov 2011, 12:21
by sadrew
come on guys! :roll:

Re: Baja B K Butler Tube Driver

Posted: 09 Dec 2011, 08:55
by sssteeve
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!)

Re: Chandler RACK Tube Driver (HELP)

Posted: 06 Jun 2013, 19:51
by Bernardduur
@ Dirk; I traced a repair here. Only difference with your unit is R17. That resistor here is only 2k2 (22k in your unit).

Re: Chandler RACK Tube Driver (HELP)

Posted: 11 Jun 2013, 11:20
by Vicus
Does some one have the schematic of RT-913? The six knob version.

Re: Chandler RACK Tube Driver (HELP)

Posted: 19 Jun 2013, 20:43
by Manfred
Vicus wrote:Does some one have the schematic of RT-913? The six knob version.
Sorry, the RT-922 only.

Re: Chandler RACK Tube Driver (HELP)

Posted: 30 Jan 2018, 10:56
by stojanos
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.

Thanks.