Re: Bob M or John T, W6 electrical problems

Posted by Roger Mills on March 19, 2007 at 08:34:16 from (71.213.68.215):

In Reply to: Bob M or John T, W6 electrical problems posted by chadd on March 18, 2007 at 11:13:27:

Chadd, there are 6 v pos ground 3 relay regulators but they are for 2 brush generators only. They connect the field to the battery through one of the relays to control output voltage. If you have a three brush generator the armature is controlled by the single relay 'cutout' and the field is controlled by moving the third brush. The third brush is the HOT side and will automatically set the magnetic polarity by touching the field post to GROUND not the battery. The field post on the outside of the gen goes to ground for max output or through a simple resistor to ground for a lower output. Connecting the field on these generators to the battery through the wrong regulator causes current to go backwards through the field and reverses the output of the generator. The field core is soft iron and only holds a "residual" magnetism. Flashing the armature post to the battery is all that is needed if they were hooked up backwards at some point. Check to see if you are using the correct regulator/cutout for the style of generator, ie 3 brushes = 1 relay and 1 resistor or 2 brushes = 2 or more relays inside the regulator.

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