via Reed:"After eleven years of not using enough SEM's in our tracks because the 4-voice was all the way across the room, my business partner decided to rack mount 2 of the voices.
The first challenge was finding a big enough box. Two SEM's side by side are wider than most standard rack boxes will accomodate. When Greg St. Regis built the Obie Rack at Studio Electronics, he opted to cut part of the sides off the actual SEM faceplates to make things fit. Since we want to keep the option of mounting the SEM's back into the 4-voice, we decided to pay a few hundred bucks to have a company build a custom steel box.
As you can see in the picture, Phil took the power supply from the 4-voice & carefully mounted it to the new chassis, putting the big transistors on the outside of the case. He then literally screwed an MPU-101 in there for Midi. At a moment's notice the whole thing could be restored to its original condition as though nothing ever happened.
There are no extra bells and whistles on the front panel. You tend to get the sound you want out of an SEM without any extra patch points or toggle switches. Bravo to Mr. Oberheim for getting it right the first time."
Reed-
ReplyDeleteLooks great. Have been wanting to do the same with my 4v. How did you handle the CV / gate connections from the MPU to the SEMS? did you just go straight in to the molex or re-mount the jacks from the 4v chassis?
thanks
Reed you should have patched it out.
ReplyDeleteI got 2 SEM voices with an extra lfo and ringmod + the sequencer in synthesizers.com cabinet build. And it's a great semi modular device now. There is a post about it on this blog to.
Yeah, mono, that thing looks like a real powerhouse.
ReplyDeleteScott - Phil soldered the CV & gates directly onto the SEM boards' molex connectors. If you do that, remember that each oscillator has its own CV input. Phil just ran a jumper from one oscillator's CV to the other.
one day i will own a midified 4 or 8 voice, and my life will finally be complete.
ReplyDeleteGEARLUST LESIGH