The Mellotron Group

The power supply will have to be rewired to accommodate a switch to the CMC 
 10, Including the addition of a couple of rectifiers and perhaps a couple 
or  three large capacitors. Also, depending on when and by whom the SMS was  
installed (during production or afterward), there may be some other mods 
that  would have to be removed. In no way is it going to be a simple switch 
over. It  also is unlikely that being able to switch between the two will be 
possible. Oh,  and you will also need to swap out the 50k pitch pot for a 1k 
unit. If  you want to make your M400 a bit closer to the CMC 10 version, 
just loosen the  capstan drive belt a bit so that under a load it will slip a 
bit. That way, when  you play more than a few notes simultaneously, the 
machine will run flat on  you.
 
Frank (officially retired from actually doing any real work on them other  
than my own)
 
 
In a message dated 7/3/2015 2:00:01 A.M. Eastern Daylight Time,  
newmellotrongroup@yahoogroups.com writes:

 
 
 
There'll probably be some questionmarks why anyone ever wants to have their 
 SMS3 motor replaced by the apparently cursed CMC10 Motor.
Well, you could  have a listen to old recordings from the 70's... My most 
favorite records from  that era had a distinct other (worldly) sound than the 
sound coming from  M400's with a new stable motor...

Yes, the old CMC10 was unstable and  sometimes even false. Detuning was 
terrible, IF you didn't want that.
But  what if you DO want that? ;-)
In my view, the old M400 was just a too  fragile instrument for the Rock 
and Roll demands of most musicians from that  time period. But have a listen 
to Early Tangerine Dream or Edgar Froese and  you'll know that this detuned 
sound is a direct outcome of the unstability of  the old CMC10.

Therefor, I'm looking for one in fairly good  condition.
Perhaps to have the SMS3 fully replaced;
Or to have both  motors, but to alter between using both of them with a 
switch of some  kind.

Hoping to hear for anyone with a CMC10  ;-)

Thanx,
Ray