Vintage Synth Repair

Hello again.

I've managed to accomplish all of the modifications that I had
planned. . as well as some others. . I will post some information and
pictures this week.

I do have two remaining questions.

Can anyone tell me:
1- how to control the two OSCs seperately with two CV inputs?
2- whether or not it is safe to clean the Prodigy's sliders with
WD-40, generic switch cleaner, etc ?

Thanks to those of you who have emailed me with input and encouragement.


-robert andrew scott
[ www.katreil.com ]
[  (540) 842-5985 ]



--- In vintagesynthrepair@yahoogroups.com, "robert andrew scott"
<quiet_channel@y...> wrote:
>
> 
> After finding this image:
> http://www.pmerecords.com/Docs/ProdigyPCBLayoutsAll.jpg
> 
> . . I've determined that I have the earlier version of the Prodigy. 
> Also, I've got my Audio Input working perfectly..
> 
> I still could use any advice  on the Filter Control Input, the 
> switch issue, and on the FM filter mod (which is trickier on the 
> earlier models, apparently)..
> 
> 
> Thanks a lot !
> 
> -robert andrew scott
> [ www.katreil.com ]
> [  (540) 842-5985 ]
> 
> 
> 
> --- In vintagesynthrepair@yahoogroups.com, "robert andrew scott" 
> <quiet_channel@y...> wrote:
> >
> > Hi.
> > 
> > I've got a prodigy with CV/gate-inputs. I don't know if these were 
> > originally built-in or if Mike Bucki (moog tech) installed them 
> > later. I don't know because my unit hasn't got the panel with the 
> > serial number.. I bought just the electronics without a keyboard 
> or 
> > case and have built the unit into a pine box.. So, its just a 
> module 
> > that I'm currently controlling with my Korg Mono/Poly.
> > 
> > 
> > I would like to install an audio input jack and a filter FM 
> > control. .
> > 
> > - -- - - - - -- - - -- - - --- - - -- - - --
> > The Filter Mod info is here:
> > 
> http://www.physicsenterprises.andrews.edu/diy_archive/manuals/moog/pr
> > odigy/prod9.gif
> > 
> > or here:
> > 
> http://www.physicsenterprises.andrews.edu/diy_archive/manuals/moog/pr
> > odigy/prodmod.txt
> > 
> > or here:
> > http://mysterycircuits.com/projects.html
> > 
> > 
> > and the Audio Input Mod info is here:
> > 
> http://machines.hyperreal.org/manufacturers/Moog/Prodigy/mods/moog.pr
> > odigy.audio.input.mod.txt
> > 
> > or here:
> > http://www.synhouse.com/prodigy2.html
> > 
> > - -- - - - - -- - - -- - - --- - - -- - - --
> > 
> > 
> > Now, I realize that these modifications should be very painless. . 
> > but not in my case. The previous owner silicon-ed the knobs onto 
> the 
> > pots!! So, I can't look at the component side of my Prodigy's 
> board.
> > 
> > If anyone could guide me to the proper solder points on the back 
> of 
> > the board, I would very very much appreciate it and I am even 
> > offering a slight financial reimbursement for the time and energy.
> > 
> > 
> > Please let me know if you'll work with me on this.
> > It will probably involve looking at the schematics and taking a 
> few 
> > pictures with your digital camera.
> > 
> > Thanks a lot !
> > 
> > 
> > -robert andrew scott
> > [ www.katreil.com ]
> > [  (540) 842-5985 ]
> > 
> > 
> > Also, what do you do when the two position switches (Osc Mod 
> On/Off, 
> > Filt Mod On/Off, Mod Shape..) don't move as freely as they should? 
> > In fact, I have to be very careful to switch the Osc Mod On/Off at 
> > all..    Maybe there're dirty? Or there could be some internal 
> > breakage (though I doubt it) (?)
> >
>