DOD-308 YJM Guitar Overdrive
Posted: May 7, 2009
So after swapping out the opamps in my Metal X I was wanting to follow what my friend Jeff Blevins did and mod a DOD YJM308 Yngwie Malmsteen (my favorite guitar player :) pedal. So I swapped the opamp out (another 4558 as I suspected) for two different OPA's. Luckily, unlike the Metal X, the OPA2604 worked in this circuit and actually I think this my fave of the three.
Speaking of Yngwie Malmsteen, here's some 8 bit Yngwie: MIDI to SN76489.
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Sample Sound Files
Here is the ultimate Yngwie Malmsteen wanna-be kit. Here's a Squier strat (not even a real strat) modified with Yngwie's old DiMarzio HS-3 pickups in all 3 positions and the fretboard scalloped, Marshall MS-2 amps, and the DOD YJM308 Yngwie wanna-be pedal.
Here's the guitar pedal opened up.
This is the pedal ripped to pieces.
Here is a close-up of the PC board. The 4558 is still there in this picture. I removed this chip and replaced it with a socket so I can swap opamps in and out to try different ones.
Here are the opamps. The far left is the OPA2604, the next over is the 4558. The thing to the right of the opamps is a socket. I soldered this in so I could swap out opamps without resoldering them.
This is the setup I used to record the last 3 mp3's above. I think this guitar pedal sounds the best when the main amp is cranked to full volume. I couldn't do that with the first 3 recordings since my neighbors would probably kill me. The Mini Marshall however isn't so loud and actually sounds pretty decent.
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