Moog Music Forum

It is the Prat Read system that's the problem...otherwise I would go ahead...but modifying a vintage keyboard to get the required on/off contacts to function in the right order is something I don't want to tackle just yet. I can imagine doing the work and finding odd keys not working or intermittent...

Thanks for help with this, as this is a big project I'm not happy about the lack of info out there and that it looks like no one has faithfully cloned the 951 circuit and keyboard ..I could be mistaken but I've found nothing so far. Added to that the staggered contacts ...I think also that this appl...

I'm considering making a 951 keyboard clone but before I commit I need to know if the 951 circuit requires that the S Trig bar and Key value resistor bar needs to be trIggered in a 'staggered ' way similar to a multi choir harpsichord. I assumed that the S Trig and Key Value bars were both triggered...

Many thanks CZ....as usual superb info here and great photos.

I see how you solved this ....I had a different method in mind to save tapping but your method seems more logical and looks great.

Thanks for your help....I guessed I would have to fabricate these rails and like you will be looking around for suitable metal pieces. I've been trawling looking for some close images of the real thing, I'm wondering if the 'nut' part of the bar is slightly moveable to allow for module size deviatio...

Not sure what the actual name is of the metal strips that runs across the cabinets of the 3C /55 etc that hold the modules in place . Has anyone any links to images of this strip ? Also what size bolts were used to hold the modules in place.? I plan to rebuild my diy cabinets this summer and use the...

Thanks for this info..I suspected the Axiom being too clumsy and its put me off buying any other aftertouch keyboard. As that was all I bought it for I wasted my money . When I was a lad (and all of this area were fields ) they told me, never buy an instrument until you've placed your fingers on it....

I'm not too happy with my Axiom midi aftertouch keyboard. Maybe I'm doing something wrong perhaps but after much trial and error I'm not getting a smooth response...in fact the aftertouch effect sort of kicks in with big noticeable glitch and a lot of pressure needs to be applied ....too much for no...

I think there are two types of Kentons...one is basic with gate and cv plus an extra cv output that can be assigned say to velocity..the other Kenton has a few more cv outputs...My Kenton has always been faultless. But I use an Oakley midi dac. You get these in kit form which are complex or bought m...

That's the one....thanks for putting this up. And thanks for letting me know that it does work. I've made up circuits off the web only to find out they didn't work properly... very frustrating. Regarding this actual circuit, the author I believe, suggested to use identical resistors and diodes aroun...

There is a PCB track and component pattern on the web of the Moog 901b which looks authentic. Has anyone made a 901b clone using this diagram ? If you did.....does it work ? Sorry I don't know how to post the image and I cannot find a link. (Component values in red/green. Track links in blue) I foun...

Thanks for those ideas. I actually did that with the first two which worked fine ..but this third one is a rogue. As the first two work fine I don't want to mess with the 901a ... I guess it could be Q7 ...maybe an odd frequency compared to the other two. Just wondered if anyone had had this problem.

One of my three 901b clones doesn't track properly. All three are identical in components but although replacing P2 I'm still getting the problem that I run out of turn on the P2 in the problem 901b. I get sync on the upper end of the keyboard but it's way out at the bottom and there's no more turn ...

No ...not normal. I once had this problem . The only thing you can do is check your power connections, make sure it is properly earthed. Check you haven't got any loose connections. Also where is your set up ? Isolate it away from anything where it could pick up external interference . Is there anyt...

Thanks for the info...yes this is basically how I'm using vibrato now.

Out of curiosity how do use the delay VCA ...Lin or Exp position ?

PS....that's a good way of archiving patch connections .