Danelectro - CO-1 - Cool Cat Drive  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Re: Danelectro - Drive ( Cool Cat )

Postby nooneknows » 18 Feb 2009, 23:53

DougH wrote:Yeah, but "MOSFET" sounds kooler and more tooby, doodz... :mrgreen:


Yes, MOjoSFET :D!

(mmh... I'm going to register this neologism...)
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Re: Danelectro - Drive ( Cool Cat )  [schematic]

Postby Cow4prez » 23 Feb 2009, 12:47

Here is my reversed job...
I did this quickly but my feeling is that it's mostly accurate with the info available. I'm too lazy to figure out all the caps and some orientations may be reversed in my haste to put this together. Anyway, have fun with it.

Here is a partial parts list

Partlist

Exported from Cool Cat Drive.sch at 2/23/09 3:18 AM

EAGLE Version 5.4.0 Copyright (c) 1988-2009 CadSoft

Part Value Device Package Library Sheet

+9V1 +9V(T) +9V(T) SQUARE cow4prez-supply 1
C1 072X0252 072X025 cow4prez-caps-film-box 1
C2 22n 072X0252 072X025 cow4prez-caps-film-box 1
C3 2.2u 0631 063_025 cow4prez-caps-electro-pol 1
C4 072X0252 072X025 cow4prez-caps-film-box 1
C5 072X0252 072X025 cow4prez-caps-film-box 1
C6 100n 072X0252 072X025 cow4prez-caps-film-box 1
C7 100u 0631 063_025 cow4prez-caps-electro-pol 1
C8 072X0252 072X025 cow4prez-caps-film-box 1
C9 100n 072X0252 072X025 cow4prez-caps-film-box 1
C10 10u 0631 063_025 cow4prez-caps-electro-pol 1
C11 2.2u 0631 063_025 cow4prez-caps-electro-pol 1
C12 100n 072X0252 072X025 cow4prez-caps-film-box 1
C13 2.2u 0631 063_025 cow4prez-caps-electro-pol 1
D1 ? 1N914.3 DO35-3 cow4prez-diodes 1
D2 ? 1N914.3 DO35-3 cow4prez-diodes 1
D3 1N4004 1N400X.3 DO41-3 cow4prez-diodes 1
IC1 TL072C TL072P DIL08 cow4prez-ics 1
J2 STEREO STEREO_JACK cow4prez-jacks 1
J3 MONO MONO_JACK cow4prez-jacks 1
LED LED5MM LED5MM cow4prez-diodes 1
Q1 L7 2N2222 TO18 cow4prez-trans 1
R1 470k 3MM.3 R0204/3 cow4prez-resistors 1
R2 10k 3MM.3 R0204/3 cow4prez-resistors 1
R3 10k 3MM.3 R0204/3 cow4prez-resistors 1
R5 12k 3MM.3 R0204/3 cow4prez-resistors 1
R6 1M 3MM.3 R0204/3 cow4prez-resistors 1
R7 150k? 3MM.3 R0204/3 cow4prez-resistors 1
R8 18k 3MM.3 R0204/3 cow4prez-resistors 1
R9 37k 3MM.3 R0204/3 cow4prez-resistors 1
R10 10k 3MM.3 R0204/3 cow4prez-resistors 1
R11 2.2k 3MM.3 R0204/3 cow4prez-resistors 1
R12 10k 3MM.3 R0204/3 cow4prez-resistors 1
R13 470k 3MM.3 R0204/3 cow4prez-resistors 1
R14 4.7k 3MM.3 R0204/3 cow4prez-resistors 1
R15 2.2k 3MM.3 R0204/3 cow4prez-resistors 1
R16 100k 3MM.3 R0204/3 cow4prez-resistors 1
VR1-DRIVE A500K POT POT cow4prez-pots 1
VR2-TONE A25K POT POT cow4prez-pots 1
VR2-VOL B100K POT POT cow4prez-pots 1
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Re: Danelectro - Drive ( Cool Cat )

Postby Greg » 23 Feb 2009, 13:59

Thanks..
Confirms it's an OCD.
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Re: Danelectro - Drive ( Cool Cat )

Postby moltenmetalburn » 23 Feb 2009, 17:24

Greg_G wrote:I don't know why I'm surprised... but I am..

The guy from Rocketfire guitars who did the drawing of the Dano Drive is selling them modded on Ebay:
http://cgi.ebay.com/MODDED-Danelectro-Cool-Cat-Drive-Overdrive-TS-808-TS808_W0QQitemZ300286621978QQihZ020QQcategoryZ41416QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

yet reading the thread on TGP.. he seems to have very little idea what he's doing.
:mrgreen:

Rocketfire quote: "But, It's 100% for CERTAIN resemblant of an Ibanez TS circuit. That's not even questionable. No speculation."



His professionally done labeling is the icing on the cake! :slap:
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Re: Danelectro - Drive ( Cool Cat )

Postby audiohub » 23 Feb 2009, 18:41

This new schematic is missing R4, another 10K.
R3 and R4 are connected in series between Pin 1 and Pin 5 of IC1.
Diodes D1 and D2 and C1 are connected to the junction between R3 and R4.
C1 is 1nf.
C4 and C5 are 220pf.
C8 is 100nf.
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Re: Danelectro - Drive ( Cool Cat )

Postby Cow4prez » 23 Feb 2009, 21:46

audiohub wrote:This new schematic is missing R4, another 10K.
R3 and R4 are connected in series between Pin 1 and Pin 5 of IC1.
Diodes D1 and D2 and C1 are connected to the junction between R3 and R4.
C1 is 1nf.
C4 and C5 are 220pf.
C8 is 100nf.


thanks audiohub,

I have made the changes and have updated the schematic as well as acknowledged your contribution.
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Re: Danelectro - Drive ( Cool Cat )

Postby wader2k » 24 Feb 2009, 00:38

nice work!!
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Re: Danelectro - Drive ( Cool Cat )

Postby cctsim » 24 Feb 2009, 04:35

Should the feedback diodes not connect to the (-) input of th op-amp on pin 2?
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Re: Danelectro - Drive ( Cool Cat )

Postby Greg » 24 Feb 2009, 05:06

cctsim wrote:Should the feedback diodes not connect to the (-) input of th op-amp on pin 2?


No, the diodes clip to the 4.5 volt Bias voltage point.
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Re: Danelectro - Drive ( Cool Cat )

Postby Cow4prez » 24 Feb 2009, 05:14

there has been some confusion, mainly on my part, as to how R3+R4 are laid out. Here is a high resolution pic to show it. Thanks to audiohub again. I had to make a third rev to the schematic. Practice makes perfect :) . This fits with what the OCD and voodoolab now. The junction of R3 and R4 from pin 1 to pin 5 should have the connection to D1/D2 combo. Feel free send comments
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Re: Danelectro - Drive ( Cool Cat )

Postby analogguru » 24 Feb 2009, 10:49

The SMD-cap values are verified on an actual unit and are correct. R7 is 150k but diode D3 is still in the wrong direction.

Diodes D1 and D2 are marked "A6" (instead of "W2") on my unit. Pin 2 and 3 of the "Drive"-poti are connected together.

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Re: Danelectro - Drive ( Cool Cat )

Postby TubeDude22 » 24 Feb 2009, 15:00

Now we need a daughter board design mod that uses a pair of 2N7000 MOSFETS for clippers. 8)
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Re: Danelectro - Drive ( Cool Cat )

Postby iwantmypie » 15 Apr 2009, 16:50

audiohub wrote:
I'm interested in it, please, what did you exactly change?


I changed C9 to 68nf, C3 to 1uf tant, C12 to 47nf, and replaced the clipping diodes with 2n7000's (plus diode on one). I also removed the output buffer by removing C11, C13, R13 and the 100k tied to the output, and jumpered the wiper of the output pot to the out jack connector. The whole process took about half an hour, and the connectors make it easy to remove the board to mod it.

IIRC, the 9V supply does not go in series through the diode as shown. The diode (1N4004) is connected from supply to ground for polarity protection, and a 100uf and (probably) 100nf cap are tied from supply to ground for filtering. I didn't remove any of the tiny SMD caps to measure them, but might this weekend. I'm guessing that with so much else of the circuit copied, these are probably correct values. A nice feature for the SMD electrolytic caps is that there are connected through holes underneath them when you remove the caps, making for easy replacement with through hole parts. Nice!

I didn't have a SMD TL082, so I left the stock TL072 installed for now. I've noticed a number of people here claim the the 082 is a key component of the OCD sound, so I'll order some soon to replace it and see for myself. I may also try replacing C8 at some point with a multilayer ceramic.

just thought i'd follow up on this to see if you had any luck trying out a TL802 in this circuit or any other mods
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Re: Danelectro - Drive ( Cool Cat )

Postby audiohub » 17 Apr 2009, 18:52

just thought i'd follow up on this to see if you had any luck trying out a TL802 in this circuit or any other mods


I did order a few SMT TL082's and tried one in this pedal, along with changing the rest of the signal caps to mutilayer ceramics to mirror the OCD. To my ears, it made a small change towards the better (cuts a bit more) and I've kept it this way.

An even better mod was replacing the 12K filter resistor with a 50K trimmer (Bournes 3362 which was easily glued on the board edge where I could adjust it while listening). This allowed me to select a filter adjust point for the front panel tone knob that worked best with my setup.

The pedal sounded great right out of the box, and even better now (to my ears, anyhow) for under $30! It's a keeper.
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Re: Danelectro - Drive ( Cool Cat )

Postby nooneknows » 11 May 2009, 22:28

In the current Guitar Player magazine issue there's a test about 39 pedals, the Dano Drive is among them.
The article says it hasn't such an inspiring distortion tone and it doesn't clean up well rolling back the guitar volume.
Given the fact the Dano IS a OCD clone (and my ears seem to confirm it, 100%), why did they give an editor's award to the Fulltone pedal sayng that it had great tone and a good dynamic too with the volume knob?! :D!!!
It makes me laugh, but I'm a bit worried about the real value of these tests and reviews.
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Re: Danelectro - Drive ( Cool Cat )

Postby Uma Floresta » 11 May 2009, 22:34

nooneknows wrote:In the current Guitar Player magazine issue there's a test about 39 pedals, the Dano Drive is among them.
The article says it hasn't such an inspiring distortion tone and it doesn't clean up well rolling back the guitar volume.
Given the fact the Dano IS a OCD clone (and my ears seem to confirm it, 100%), why did they give an editor's award to the Fulltone pedal sayng that it had great tone and a good dynamic too with the volume knob?! :D!!!
It makes me laugh, but I'm a bit worried about the real value of these tests and reviews.


Seems they were listening with their eyes. And of course, GP reviews are worthless anyway. It's all about sucking up to their advertisers.
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Re: Danelectro - Drive ( Cool Cat )

Postby Pedalpusher » 12 May 2009, 18:33

I have both a Drive and a V1 OCD and there is little difference in tone and dynamics between the two. I know TGPers will flame roast anyone who makes this claim but I dare them to pick out the real OCD in a blind test.
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Re: Danelectro - Drive ( Cool Cat )

Postby nooneknows » 14 May 2009, 23:07

I heard them both, side by side, and the only difference I've really found is the pots taper, so equal positions make a slightly different sound. But the character overall is there, I'm quite sure about it.
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Re: Danelectro - Drive ( Cool Cat )

Postby ShortScaleMike » 15 May 2009, 08:47

I dunno. The CCD I had was way brighter with the tone at 12 o clock than the OCD could ever get, even maxed tone with HP up.
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run danelectro cool cat drive at 18v ??

Postby jojojo » 16 Jun 2009, 16:21

Hi Guys.

I am new to this forum but i like it a lot already. ;-)
I was wondering if its possible to run the danelectro cool cat drive at 18 volts like many people do with the Fulltone OCD?
Or will any damage be done?

Cheers
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