Re: T212 Questions

[Ted Thompson <tthompsn@mail.bcpl.lib.md.us>]

Bruce Doc Nelson wrote:
> 
> >Hello,
> >
> >  can anyone out there help me with a couple of T212 questions ? 
> > Specifically,
> >
> >        a) Is the chorus on the T212 generated by a scanner as on an M3 ?
> >
>             The vibrato scanner is different from M-3, B-3, etc...  Although
> the theory             of selecting phased portion of the signal remains the
> same, the overall             effect was noticably different, although not
> really undesirable.
> 
> >        b) I'm not sure if the T212 has second and third percussion (it has
> >           celeste, guitar, banjo, stuff like that) but was wondering if
> >           one of the Trek percussion units could be fitted to it.
> 
>             Actually, names like Celeste or Marimba or just different titles
> for the               same thing: decayed drawbar voices.  Some use single
> drawbar tones while             others use combinations of 2 or 3.  With the
> right schematic or the organ             you could find which ones utilize
> the 2nd or 3rd harmonics and merely                  disconnect everything
> else, essentially making the tab marked, for             instance, Marimba,
> actually the 3rd harmonic.  Also, I'm sure a phone call             to Mike
> Smokowitz at Trek II would reveal a few ways to connect up one of
> his opercussion units.  Ask him about his perc unit #TP-2B.
> 
> >
> >        c) The T212 has a seven pin (I think I counted them right) connector
> >           for a Leslie. Can this be changed to a six pin for a Leslie 145 ?
> >           The internal Leslie sounds nice but only has one rotor.
> >           Here's the easiest way to connect up a 147 to your T:
>             1) Insatll a 6-pin (female) socket into a small Radio Shack
> chassis and                mount it somewhere convenient in the back of the
> organ.
>             2) Pins 3 and 4 of this socket should wire up to the AC of the
> organ.  A                  good place to tie it in would be at the motor's
> blue and gray lines.
>             3) Pin 6 should wire to the signal side (probably a red or green
> wire) of                the T's internal Leslie speaker and pin 1 should
> wire to a convenient                ground point.
>             4) The motor control portion is easy also.  Go back to Radio
> Shack and get                yourself an "SPST Relay with a 120 Volt AC
> Coil."  The coil of this                    relay is going to wire to the
> slow motor of the T's internal Leslie so                 that the relay's
> contacts close whenever the slow motor is turned on.                  Pins 2
> and 5 from the Leslie socket will wire to (1) the wiper of the
> relay and (2) to it's normally open contact so that when the slow motor
> comes on, it energizes the relay, connects pins 2 and 5 together thus
> engaging the 147's relay and slows the rotors down.
>                NOTE: the Load switch on the 147's chassis will probably need
> to be set                in the "8 Ohm" position, making the 147 appear as
> just another speaker                connected to the organ.
>                If you have any questions, feel free to give me a
> call.  Bruce....A.B.M.S...419-472-3499
> >  Thanks in advance.
> >
> >Mike Sues
> >http://www.magi.com/~dragonmn
> 
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> >This message was randomly generated by a distributed system of simians
> 
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> >
> >

I would suggest cutting the internal leslie out of the circuit and 
setting the tap switch to 8 ohms.  That way you'll have stationary 
inboard and leslie 145/147 only.....

T Thompson
Maryland Organ Service