[sdiy] Crumar Performer;anyone have a diagram for the ladder filter version?

[Dan Norris]

----------------------------------------> Date: Wed, 31 Oct 2007 15:03:23 -0800> From: sounddoctorin at imt.net> To: synth-diy at dropmix.xs4all.nl> Subject: [sdiy] Crumar Performer; anyone have a diagram for the ladder filter version?>> I got serial A320 and it has a discrete filter like the Multiman.> Probably the same design but wondered if anyone had a print of the Brass> board for that early version.>> Also this one is mod'd with a board with 10 4066 chips on one board with> diodes that go to the same lines as the divider board. And there is> another big board of digital chips stuck between someone's set list on> old form feed paper in back :-) Wire wrap and vector board.>> The only mod on the front is a switch that I see introduces a sub> oscillator but I'll be curious if the seller can ask the original owner> if there's anything else going on there. They had modified this and a> later one with front tuning knobs and I modded the Filter feedback on> that one and it screams! Classic VCF mod sweeps. That machine is a> later one that I think was called "Performer 2" and adds an octave> transpose switch in the middle but it doesnt' have the crude but> effective suboctave mod like the one with the ladder filter. Wow now I> have one of each variety here. I'll have to decide which one(s) to> sell. The one I had is a middle production one but they go for so> little and as we know the parts are worth a bit. 250 cash...or 160> bucks of keys, and a couple hundred of chips maybe? VCF, few 3080's, 3> BBD, TOS, and a handfull of dividers. Maybe I can get more out of the> modded one. :-) -Bob> _______________________________________________> Synth-diy mailing list> Synth-diy at dropmix.xs4all.nl> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

Heh, not exactly sure what you are asking. Here's a layout of the 557 brass board from my dead Performer:
http://users.rio.com/senorris/junk/557bfol1.gif
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