开云体育

----- Original Message -----
From: "Carlo Pietroniro" <organist@...>
To: "Hammond Zone" <hammond_zone@...>
Sent: Tuesday, March 05, 2002 10:02 PM
Subject: [hammond_zone] tremulant speed

my G-100 has a 'tremulant' tab for each of the manuals, and it's a very

slight tremolo, just like a pipe organ. Hypothetically speaking of course,
is it possible to change the speed?

carlo

I know the vibrato is belt driven on the G-100 so it is easy to change the
speed by changing the size of the drive or driven pulleys. For tremolo,
there is a transparent patterened wheel that modulates a light source which
is picked up by photocells. It is driven by a clock motor. I don't
remember whether it was belt driven or attached directoy to the motor. If
belt driven, it would be easy to change too. If it is directly driven, then
one could power the motor with a variable frequency oscillator to get other
speeds. Such a circuit would not be hard to build as a clock motor uses
very little power.
R Ahlvin