MU-TRON BI-PHASE

[CJ]

just like the sign says,

big bucks for these retro boxes, some guy borrowed this and dropped it so he is on the hook,

now channel B don't work and he is sweatin bullets because every musician in this town is broke,

you gotta sell 70,000 CD's to break even these days, that ain't easy,

 

[CJ]

pics

 

[CJ]

parts is parts

 

[CJ]

seems if they transitorized this it could come in a smaller package,

 

[CJ]

this is another  pc board

 

[CJ]

here is the back of that board,

if someone could send me the Gerbers by tomorrow that would be great, not the food,

 

[CJ]

if someone could burn and stuff this, that would be great, monday delivery is fine, er,tuesday, got to wait for the smoke to clear,

 

[CJ]

schematic

 

[CJ]

part 2

 

[CJ]

part 3 and out

 

[CJ]

prayers answered>

http://www.crazy-patroche.com/article-mu-tron-biphase-musitronic-plans-et-clonage-108652497.html

 

[Jarno]

That guy has some amazing stuff on his site, the minimoog clone and ARP clone, good stuff there.

 

[Gus]

I worked on one years ago.  I found broken switches. However I could not find exact replacements.  So the owner shipped it to someone that had the exact parts and worked on Mu-tron stuff.  I don't remember who it was sent to.

Check the switches first followed by the solder connections at the power supply(Higher mass parts).
Also check the input and output jacks if there was something still plugged in.

 

[CJ]

Thanks Gus!

i re soldered the switches and shipped this thing out, i believe when they dropped it that a wafer switch for the A/B selection got  moved , it works now, probably the ,ost quiet effect that we have ever seen come in the shop,  would be a great DIY project,

 

[fragletrollet]

I built a Quadriphase based on bareille`s pcb`s for my small fx-based MOTM system. Here`s some pics (wiring has been tidied up since then):

14 vactrols, 29 opamps, 20 jacks and 6 dual concentric knobs... phew!

 

[CJ]

holy cow that's awesome!

get 4 amps hooked up to that and start trackin, jus sayin...