Sonomatic - Doctordrive 2

okgb · Post by **okgb** » 19 Dec 2020, 19:29

Anyone know this pedal Sonomatic Doctordrive 2 , made by a company in Buenos aires Argentina and billed as a 18watt amp emulation
It appears to have one opamp & two transistors but if it's a yats it sounds pretty good for a med/ lo gain pedal

ppluis0 · Post by **ppluis0** » 20 Dec 2020, 04:29

Unfortunately there is scarce information about this line of boxes in my country.

Here is the only image found in the web, with a clever idea where to put a warranty sticker:

Looks like not to have an op-amp inside...

Spanish-english translation of text:

Entrada = Input
Salida= Output
Volumen = Volume
Timbre = something like Tone
Saturaciòn = Saturation (or Gain or Drive...)
Gordo = Fat
Filoso = Sharp

Cheers,
Jose

FiveseveN · Post by **FiveseveN** » 20 Dec 2020, 08:52

ppluis0 wrote: ↑20 Dec 2020, 04:29 Looks like not to have an op-amp inside...

I disagree

okgb · Post by **okgb** » 20 Dec 2020, 15:58

Exactly , I can't find a website for these guys, though I see someone selling their version of an 808 on reverb, Similar case form factor, which is compact and sturdy, well designed I think.
i fixed one for a friend that the dc protection diode blew when it was plugged in hot, it arched which was heard. It didn't have the warranty sticker i took some images [ can't find them atm ]
the fat / sharp switch changes the gain structure enough that you have to change the other settings, but gives you a couple good angles at the sound.

ppluis0 · Post by **ppluis0** » 20 Dec 2020, 22:27

Hi FiveseveN,

You're right, AGAIN !!!

Now, after your confirmation that there are a dual op-amp inside, my best guess is that the two components within the circle (ellipse, anyway...

) may be a couple of 2N7000 connected in anti parallel ?

If this is correct and looking the tone switch that can be viewed in the front image, this unit is nothing than another clone of a Fulltone OCD

I think that the quality construction of this box looks professional but they simply build copycats of established models and does not design anything new, same as the others local manufacturers in my country.

Cheers,
Jose

ppluis0 · Post by **ppluis0** » 20 Dec 2020, 22:44

okgb wrote: ↑20 Dec 2020, 15:58 I can't find a website for these guys

Hi okgb,

Searching in some local music forums found that after disagreement between partners one of this guys changed their name to sonobox: http://sonobox.com.ar/

The other member of the original enterprise continues doing business with name Electromate: https://en.electromate.com.ar/

But, as I say previously , all the local offer from several manufacturers are copies of well established stompboxes.

Cheers,
Jose

okgb · Post by **okgb** » 23 Dec 2020, 14:20

, it's a light/med overdrive so I wouldn't think it an ocd, I could be wrong i never liked [ or tried much ] ocds but I liked this box

Interesting how one guy kept the look and the other went way different [ with more offerings ]

okgb · Post by **okgb** » 23 Dec 2020, 14:45

oops sorry about the poor quality pix , I didn't realize that .

okgb · Post by **okgb** » 23 Dec 2020, 14:54

[attachment=0]DSC09171.JPG[/attachmen ... hment] More pix [ drag & drop doesn't always work , I have a couple more pix but not any better than these, let me know if you want to see them]

Manfred · Post by **Manfred** » 23 Dec 2020, 16:54

Can you take a photo of the solder side of the PCB from above that shows it flat and approximately rectangular and give me the dimensions?
Then I can make a PCB clone to trace the circuit where you can then enter the component values.

okgb · Post by **okgb** » 23 Dec 2020, 17:35

60mm x 90mm this is all I have for images of the copper side. The trace broke off of the led so I had bent the lead over that's why it looks ugly.

ppluis0 · Post by **ppluis0** » 24 Dec 2020, 01:50

okgb wrote: ↑23 Dec 2020, 17:35 60mm x 90mm this is all I have for images of the copper side. The trace broke off of the led so I had bent the lead over that's why it looks ugly.

Nice pictures okgb !!!

At first glance (TL082, two 2N7000, 1 Ge diode, potentiometer values...) this board appears to be a clone of a germanium OCD, but who knows...

So... do you realize that after remove the aforementioned internal sticker this pedal is out of warranty ?

Cheers,
Jose

okgb · Post by **okgb** » 24 Dec 2020, 17:46

This pedal never had that sticker, but I think I'll just buy it. It's reasonably satisfying to play, I thought ocd were higher gain ? dr drive feels like diodes in the fb loop but maybe it's just a reduced gain ?

ppluis0 · Post by **ppluis0** » 24 Dec 2020, 19:00

I made my comment about the warranty sticker as a joke and I hope you understood that way.

This is a great opportunity to trace back this design and see what is distinct respect to others overdrives.

Cheers,
Jose

snakepit86 · Post by **snakepit86** » 24 Dec 2020, 19:54

They are really good looking and well build pedals

The Dr. Drive is they take on the OCD

Manfred · Post by **Manfred** » 25 Dec 2020, 11:28

Tracking is in progress.
Not all component designators are recognizable as well as the color codes of the resistors.
If someone owns the pedal then please enter the missing part names and part values in the following image of the part page or correct the already entered values if necessary.

: DoctorDriveComponets.bmp (1.67 MiB) Viewed 1642 times

okgb · Post by **okgb** » 25 Dec 2020, 14:28

Nice job so far, though if it's just an ocd is it worth the bother ? It's tough to get out of the case, pcb soldered in place to jacks after they're installed ?
I can say there is the 4148 protection diode in the lower right hand corner between the jack & pwr jack

Manfred · Post by **Manfred** » 26 Dec 2020, 00:40

I have just finished the tracing and have drawn the circuit diagram by hand, which I will soon draw with the electrical CAD.
I can say in advance that circuit came to me familiar , it is very similar to the VickAudio TreeOfLive Overdrive.
There are few changes in the schematic structure plus the Millennium Bypass circuit is used.

okgb · Post by **okgb** » 26 Dec 2020, 12:51

How do the Vic values compare to the ocd ? Since full of himself's designs are often variations of something else, what proceeded the ocd or was IT based on?
[ edit I see it apparently is similar to the voodoo labs o/d , now which egg came before that ? ]

Manfred · Post by **Manfred** » 26 Dec 2020, 18:47

I must have been blind, it is indeed an OCD clone. the circuit structure does seem to be the same,
I will compare the resistor values on the picture again.

Sonomatic - Doctordrive 2 [traced]