Effective with serial 8411 on Spinet Model M Organs, condenser C46 has been changed to an adjustable type having a capacity of .000024 - .000090 mfd. It is now located inside the expression control unit. This condenser is used as a factory volume adjustment and its setting should not be changed after leaving the factory. Resistor R33 and condenser C42 have been removed from the expression control unit and are now found inside the amplifier chassis, with a small change in wiring which has no effect on the operation of the amplifier.
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