Need help identifying a mystery pedal.

[Bill Mountain]

OK.  It's not really a mystery.  I built a mod kits Thunderdrive (shown here http://www.amplifiedparts.com/products/accessories/K-950 ).  I like to build kits sometimes so I can get a project that is pre-dilled and verified.  Anyways, it turns out to be a nice little overdrive.  I use it with my bass and I don't need to make any changes but of course I can't leave anything alone for too long.  I want to build another one from scratch (using higher quality components).  I am under the impression that these kits are copies but I'm not sure about this one.  I lost the build instructions but I remember it uses a MPSA18 and it has diode clipping.  It is really a simple design (everything fits on a small tag strip) and this is probably a silly question but does this sound like any other pedal you guys know?  I'm hoping that it is based on something classic so I can research popular mods.

Thanks!

[MarcoMike]

what are the knobs labels? "nothing" and "more nothing"

the effect is just a passive something with a diode, I wouldn't call it an overdrive...

[oldschoolanalog]

...but I remember it uses a MPSA18 and it has diode clipping.

Mmm... http://www.fairchildsemi.com/ds/MP/MPSA18.pdf
And a 9V battery.
Passive?
Active!

@Bill: That circuit shouldn't be too hard to rev. engineer.

[Bill Mountain]

what are the knobs labels? "nothing" and "more nothing"

the effect is just a passive something with a diode, I wouldn't call it an overdrive...

I'm confused as to why you think this is passive.

[Bill Mountain]

...but I remember it uses a MPSA18 and it has diode clipping.

Mmm... http://www.fairchildsemi.com/ds/MP/MPSA18.pdf
And a 9V battery.
Passive?

@Bill: That circuit shouldn't be too hard to rev. engineer.

I know how it goes together.  Hell, I built the damn thing.  If I remember correctly even if I find the build instructions there wouldn't be a schematic to compare to other designs.  I may just have to make my own schematic.

[anchovie]

One transistor and two clipping diodes?

Most likely an Electra Distortion derivative, which means it can be easily converted into several items from the Lovepedal range!

[Bill Mountain]

One transistor and two clipping diodes?

Most likely an Electra Distortion derivative, which means it can be easily converted into several items from the Lovepedal range!

I just looked this up and I think we have a winner!

[amplifiedparts]

Here is a video demo of the Thunderdrive if anyone is interested in the sound:

http://www.americansongwriter.com/2011/05/video-review-thunderdrive-overdrive-guitar-effects-pedal/

[MarcoMike]

hey, I am sorry Bill, I did not notice the transistor at first, and thought it was just a bunch of resistors and wire...
I didn't think enough before speaking...