[Milsurplus] Dual Input Voltage Dynamotors

[W7QHO at aol.com]

The dynamotor in the DY-88 power supply used with the GRC-9 will operate on 
three (3) different input voltages.   One 12 and two 6 volt motor windings are 
included on the armature (three separate commutators and six brushes).   For 6 
volt operation, one of the 6 volt motors is activated.   The two 6 volt 
motors are run   in series for 12 volt input, and the 12 volt motor is connected in 
series with these for 24 volt input.    When running on 6 volts, the second 6 
volt motor operates as a generator in series with the first motor to provide 
a total of 12 volts to the shunt field.   Two series field windings   are also 
involved (circuit diagram available on request).

Dennis D. W7QHO
Glendale, CA