Vintage Synth Repair

Hello from the new guy :)

I've got an MG-1 that I found at a pawn shop and resurrected. Man, do 
I wish I had found this group about 6 months ago! :) Anyway, it's now 
in good working order, and I've made several mods to it, installed a 
MIDIJack, etc. 

For my next mod, I've decided that I want to try and slow down the 
LFO rate. If I understand correctly, the LFO in this machine is just 
another VCO. There's a slider type variable resistor for the rate 
control, where lfo rate increases as resistance decreases. SO I was 
thinking that I could just insert an extra resistor in line and that 
would slow things down.

Of course not... that would be too easy, wouldn't it? :) I tried it 
out, soldered a 22k resistor in at a couple of different points, but 
there was no change (as far as I could tell, anyway)

Is anyone here familiar enough with this little quasi-moog to help me 
out? I'm really not even sure if I have the right idea or not. I've 
been using schematics for the Rogue, which is (supposedly) nearly 
identical in design. I've been unable to find any schematics or 
technical information about the MG-1 online, so if anyone knows where 
I can find anything, please let me know. 

Thanks for any help you can provide...


Duane

Hallo!

>... I've been unable to find any schematics or 
>technical information about the MG-1 online, so if anyone knows where 
>I can find anything, please let me know. 

I have scanned schematics (1.3MB).
If you want I can send it per private email.

Ciao
Peter

        \|/
       (o o)
--oOOO--(_)--OOOo-----------------------------------------------------
-
                   Ing. Peter Ullrich         
mailto:ullrich@...
                   Homepage: www.ullrich.at.tt , 
http://come.to/ullrich
   .oooO           Hardware & Software Developer /  Electronic 
Musician
   (   )   Oooo.   KAPSCH AG / ECCN Control Systems    Vienna / 
Austria
----\ (----(   
)-------------------------------------------------------
     \_)    ) /
           (_/

Hey Peter... yes, yes, by all means, send them over! :) Just mail 
them to my address above.

Thanks a million...

Duane

--- In vintagesynthrepair@y..., "ullrich_67" <ullrich@k...> wrote:
> Hallo!
> 
> >... I've been unable to find any schematics or 
> >technical information about the MG-1 online, so if anyone knows 
where 
> >I can find anything, please let me know. 
> 
> I have scanned schematics (1.3MB).
> If you want I can send it per private email.
> 
> Ciao
> Peter
> 
>         \|/
>        (o o)
> --oOOO--(_)--OOOo---------------------------------------------------
--

> -
>                    Ing. Peter Ullrich         
> mailto:ullrich@k...
>                    Homepage: www.ullrich.at.tt , 
> http://come.to/ullrich
>    .oooO           Hardware & Software Developer /  Electronic 
> Musician
>    (   )   Oooo.   KAPSCH AG / ECCN Control Systems    Vienna / 
> Austria
> ----\ (----(   
> )-------------------------------------------------------
>      \_)    ) /
>            (_/