To start the organ when installed in this manner, the following procedures should be
followed:
1. Turn on switch #1. Watch for the neon lamp on the regulator to glow.
2. Start the console in the usual manner.
3. Turn on switch #2.
A maximum of three amplifiers may be energized through the console to cabinet cable
as shown. If additional cabinets are required they should be connected in the usual
manner to a separate power source.
Switch #2 may be eliminated by including a special relay in series with the
synchronous motors to turn on the power cabinets. Figure 7 shows this relay in use.
This relay does not have sufficient current carrying capacity to control the A.C.
supply to the power amplifiers directly, therefore, it is necessary to also include
a type A-107 relay for this purpose.
Type 3040A5 relay manufactured by the Automatic Electric Company is used in series
with the console run motors, and type A-107 manufactured by the Allen-Bradley
Company is used to energize the power amplifiers.
A convenient method of providing automatic operation is to mount both relays in a
box provided with the necessary fittings to connect to organ equipment and power
source as shown in figure 6. This method is especially useful for demonstration work
as no special wiring is necessary other than the usual changes to console line
panel shown in figure 2.
Such a relay box may be located in any location most convenient for plugging in the
organ equipment. A box 18 inches by 8 inches outside dimensions is a convenient size
as the Model G regulator may then be placed on top of the relay box and the
connections made in an orderly manner. The relay box should be at least 3 ½ inches
in depth inside.
16
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