Diamond - J-Drive Mk3

Mr. G. · Post by **Mr. G.** » 23 Jul 2008, 02:26

Anybody ever dissected a Diamond J-Drive MK3? I had one of these for a while, but unfortunately had to sell it a few months ago (due to various reasons). I'd love to be able to build one myself, but without the boost section. I'm still a noob, with only two builds under my belt. So, I'm looking for possibly a perf or vero layout. I'd also generally like to learn about how the pedal works, since it has a different style tone control than you normally see.

Thanks for any info! I've learned a lot just by lurking around for a while.

btw, the two builds that I've done were a 3 loop + tuner out TB pedal, and the Eternity perf layout that Deaj did (which sounds awesome!).

JHS · Post by **JHS** » 23 Jul 2008, 06:31

Similar to a Korg OD, but w/o the I-buffer, IC is a OPA 2134.
Some cap values are slightly different.

JHS

Mr. G. · Post by **Mr. G.** » 23 Jul 2008, 14:31

Call me ignorant, but I don't believe I've ever heard of a Korg OD

. Could you elaborate on that a little?

JHS · Post by **JHS** » 23 Jul 2008, 14:48

The drive is called Korg "OVD-1 Overdrive", schem can be found via GOOGLE.

JHS

Mr. G. · Post by **Mr. G.** » 23 Jul 2008, 14:50

Thanks a lot!

Mr. G. · Post by **Mr. G.** » 24 Jul 2008, 05:21

ok, I tried searching google, but couldn't find any that you didn't have to pay for. Even if I did find one, the schematic wouldn't help me too much (would still like to study it though), as I'm not that great with understanding them. As I said before, I'm still a noob with all of this, but I'm trying to learn. I understand what all the symbols mean, but I'm not able to take a schematic and apply it to a perf/vero/pcb layout yet.

Does the tone control act the same way in that Korg OD as it does in the J-Drive?

soulsonic · Post by **soulsonic** » 24 Jul 2008, 06:05

FOUND!
https://img.photobucket.com/albums/v324 ... 1216879479

gnognofasciani · Post by **gnognofasciani** » 24 Jul 2008, 14:28

It just looks like a plexitone!

Mr. G. · Post by **Mr. G.** » 24 Jul 2008, 15:21

The J-Drive MK3 sure doesn't sound like a PlexiTone though. I've had both, and they are very different.

JHS · Post by **JHS** » 24 Jul 2008, 16:27

Due to the circuit topology the J-Drive sounds like a TS/FD2/OD-1 but has a better tonecontrol, similar to the OVD-1.
IMHO due to the OPA it's a bit more refined sounding but the basic sound is TS/FD-2.
JHS

soulsonic · Post by **soulsonic** » 24 Jul 2008, 16:42

The tone control looks interesting, I think I will start experimenting with the Korg circuit. Thanks for the idea, JHS!

indyguitarist · Post by **indyguitarist** » 26 Jul 2008, 16:28

similar to a boss od-1 with a filter in the inverting stage
bw

culturejam · Post by **culturejam** » 05 Apr 2011, 17:59

Courtesy of TGP.

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