EARPHONES
Earphones can be added to the console for practice purposes so as not to distrub others. Earphones at best
cannot replace the tonal quality achieved from the instruments' own speakers but do make the organ "more
available"
One method of attaching earphones is shown in the sketch below, using a reluctance type headset of good
quality. Inserting the phone plugs silences the speakers in the console. Wiring is between the preamplifier
terminals marked "G" and the main amplifier input.
PHONO INPUT
A microphone or record player pickup may be used through the organ if desired. The
preamplifier is equipped with a standard phonograph input jack. The input impedance is
approximately 1 megohm and the circuit requires a maximum input signal of about 1/2 volt.
A volume control will have to be installed between the microphone or record player input
and the organ inasmuch as the swell control of the organ does not affect this input.
SCHEMATICS
- Figure 30 - Hammond Organ models A-100, A-101, A-102 schematic.
- Figure 31 - Hammond Organ models A-100, A-101, A-102 wiring diagram.
- Figure 32 - AO-39 Power Amplifier schematic.
- Figure 33 - AO-39 Power Amplifier wiring diagram.
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