[HAM] Hammond Cv and DR-20 Tone Cabinet.

[Brad Baker]

On 2/14/07, Dave Bishop <xxcaptinxx at comcast.net> wrote:
> I haven't tried it myself, but I think the trick is to substitue a dual
> matching transformer from a donor console or an M3.  Then you split the
> drawbar busses and pre-set panel, and rebuild the vibrato delay line like a
> C-2G and add a microswitch under the B preset key.

There is one more trick; the chorus vibrato switch assembly needs to
be modified.  From an old posting...

"The chorus/vibrato switch was removed and disassembled. The BV's
chorus/vibrato switch is a shaft driven affair with twenty four or so
cam-driven contacts arranged in three groups of eight.  In the BV the
switch's six positions correspond to V1/C1, Off, V2/C2, Off, V3/C3,
Off.  In the B3 it's C1, V1, C2, V2, C3, V3.  I had to grind the cams in
the BV's switch to make it hold a group of eight contacts closed for
two adjacent rotational positions as the B3's does.  The cams are some
kind of plastic material and grind easily with 150 grit paper."

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