PEDAL SWITCH ASSEMBLY
The pedal switch (shown in Figure 20) is similar in internal construction to the manuals except that only four
busbars are included instead of nine (Figure 21). Each of the 25 pedals actuates a double set of contact
springs, making eight contacts available for each note. Each note consists of a fundamental and a number of
harmonics, no sub-harmonics being used. The pedal contact springs are connected to terminals by
resistance wires similar to those used in the manual assembly, and a cable connects these terminals to the
proper terminals on the generator terminal strip.
Four colored wires carry the pedal tones from the busbars to the pedal drawbars. The wires are connected
first to a resistor panel on the back of the manual assembly. A small choke coil and resistor mounted on the
manual assembly are wired to the lower drawbar (see Figure 22) and serve to filter out any higher harmonics
or transients which might be present in the lower pedal frequencies.
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