DEL 1929 dynamo

[Bob Culver]

The long ones are interchangeable with the 35A and 35M with any wiring changes as per the Refresher article. Note the main brushes are 90 deg to each other. If no 3rd brush the user would have to be aware of precautions necessary to limit the field current, unless it has been rewound, which, with 4 coils, seems less likely. Some claim slightly less capacity than the 35M. With 3rd brush lifted there should be no connection between the field terminal and anything else if the internal resistor is out of action. The armatures are wound different and fault tracing with a meter is different and much more confusing! Excellent diagram in Woodrow. My RP has had all 3 over the ages; it is only recently I grasped all the differences.