Moog Music Forum

Hi all, coming up to a year ago I posted regarding this model D. https://forum.moogmusic.com/viewtopic.php?f=2&t=2 I had to put the project on hold but have now pulled it out to continue with the renovation. I now have no sound generated except for the 440 generator plus white/pink noise. When I...

Hmmm interesting stuff.

I note that the main smoothing caps look a bit dodgy and thinking about it it's not a bad place to start.

I guess if the supply is flaky that might show down stream.(Ref osc varying)

Thanks guys
Geoff

Ok, I'm much more familiar with this Model D now. Question: The oscillators seem to fluctuate quite a lot. Any ideas? Capacitors perhaps? Why is there a warm up time? I ask this because it is solid state after all. Also I notice that the tuning adjusters have been modified. Were the originals regula...

Excuse my ignorance, I'm completely new to this (I'm liking it) are these toggles factory mods or more likely done by the previous owner? This looks not like a factory modification. Most modifications that involved additional switches and knobs are very likely done by some technician or a musician....

Here are some shots from behind the front panel..(switches are indicated)

The toggle switch next to the external audio in gain might use the well known, normally external cabled, self feedback track. Switching the audio output to the external in and the activated external input volume used to overdrive the mixer and filter. As these mods were normally done only on a very...

Figuring out the mods might help if we could see behind the back panel and under the modulation section. :) Thanks Lucky Ok I've attached two pics of the mod behind the modulation section. It looks like whoever did the mod used a knife and fork to do it! I'm thinking of either removing it and re-fi...

Ok thanks guys.

The story has changed a little in as much as I've been reading the manual and this has demystified a lot.

That said I'm still a little confused with some of the mods. I'll get some pics of the internals up as soon as I can.

In the meantime...thanks again.
G

Update: The continuous tone is a function of the toggle switch above the oscillator modulation switch. So that's that one solved. :) I now have this odd problem that osc 3 stays on on frequency IE: whatever key is pressed first dictates the tone regardless of what key is pressed next but this is onl...

Hi all, I'm brand new to this forum and also to the world of the Minimoog. Ok here goes!...I have taken possession of a model D. It was last used about 30 or so years back, I'm in the process of renovating it and have a few questions. Rather than ask too many straight off the bat I'd like some info ...