Page 9 - 2015-06

Re-position the switches

All the switches/controls had to be re-positioned in order order to accommodate the
ballast. Fortunately, they can be re-positioned to un-used holes in the lamp house.

Motor variable speed

1. OFF – Everything off
2. ON1 – Auxilliary fan
3. ON2 – HID Lamp (wired in
series with LAMP 1)
4. ON3 – Projector Motor

Not used – makes a
nice terminal block!

LAMP 1

SCR (Silicon Controlled Rectifier)

An SCR control is a handy way for a running 110
volt motor off a 230 volt supply and is used by many
a hobbyist. In order to not over-volt the motor, a
resistor could be placed in the parallel with the
potentiometer. The Specto has a special winding in
the dropper resistor to achieve this.

Right: The SCR controller in place
with the fan/lamp/motor switch in the
background

REEL DEALS June 2015 9