I had a significant birthday the other day, so a longtime friend generously gifted me with a box full of pedals he had picked up over the years a various yard sales, thrift shops, etc. Virtually a complete pedalboard. I'm a lucky guy to have friends like that.
One of the pedals was a Yamaha DM-100, that I gather was their attempt to mimic the Boss MZ-2 Digital Metallizer. Or maybe the MZ-2 came after. I don't know. It's a distortion pedal, with several modulation presets - short delay, chorus, flanger - that can be used with the distortion or on their own.
Naturally, I had to take it apart and see what was in there. Unlike the Boss unit, that generates the modulation digitally, this one is all analog, for better or for worse. Much to my surprise, it houses an MN3007 and MN3101 as its modulation source. The chorus and flange sounds aren't too bad at all. The "doubling" sound is basically the longest short delay they can squeeze out of the BBD, which is nothing special.
The board is pretty tightly packed, but it would be interesting to see if I can spot the components for the modulation sub-circuit, and maybe insert a mini-toggle or two to coax more out of it. Yet another post-retirement project.

