I have a step sequencer that will send 0-15V CV signals and I want to use it to control my MF-102 (and my EHX HOG, actually.) I was wondering if it’s safe to send 0-15V to the Ring Modulator’s CV inputs or do I have to be careful and measure where the voltage exceeds a certain level on my sequencer.
The CV inputs accept 0 to +5V.
The PDF version of the MF-102 user manual can be found here:
http://www.moogmusic.com/moogerfooger/?section=product&product_id=21071
The link for the manual can be found under the “Manual” tab on the resulting page. Good luck, and welcome to the forum.
Bob
Yeah I read the manual, but I was just wondering if it would actually damage something if it received a higher voltage or if it would just not sound right.
The manual also says you can run the unit on up to 15 volts dc.
The 'foogers CV inputs are current limited but going outside the recommended voltage range (either 0 to +5V or -5 to +5V) is not advised by the tech staff.
I.e. you can increase the resonance on the 103 by cranking the knob to ten and applying up to a +5V offset (= +10V), but at your own risk!
This is different from the DC used to power the unit (9-15VDC).
The only other thing would be to rig some kind of voltage divider on the patchcord going into the MF-102 so that only a maximum of 5V can get into the fooger. Perhaps connecting a parallel resistor of the correct value across the patchcord going into the CV input might suffice.
However, before doing anything like this, please do yourself a favor and contact Amos first, as he designed many of these circuits (I guess he didn’t after all. Mia culpa…), and can tell you exactly what you need to know. His user name is Amos.
Good luck, don’t void your warantee, and keep us posted.
Edit: Mia culpa.
Hmm the voltage limiter is not a bad idea. I can probably rig up a simple box to do this. I sent a PM to Amos asking about the voltage range, anyway, so I’ll let you guys know what he has to say about it.
I had actually been using a Zvex ringtone for a ring modulator originally because i liked that step sequenced ringmod sound, but I realized the moog simply sounded better and was incredibly more versatile, so now that I’ve gotten a separate sequencer, I’m looking to kind of re-capture something like that step sequenced ringmod sound and retain all the flexibility of the MF-102.
Mayi,
I thought Bob Moog designed most of these circuits.
Oops, I misspoke! Thanks for correcting me.
