Re: Field resistor Partnumber

Posted by Janicholson on July 31, 2007 at 19:00:13 from (66.173.50.185):

In Reply to: Field resistor Partnumber posted by Rexalot on July 31, 2007 at 12:28:57:

Rex, there are two resistors on the old LHDB light switch. One is for the lights, ant it is only used for dim lights it is located between two terminals, one of which connects to the lights. When the switch is turned to D, the light power goes through the resistor (a replacement would be a 3 or 4 ohm power resistor (ceramic wire wound) with about 80 watts of capacity. This can be soldered into the connections with short # 12 high temp wire (from appliance repair) By the way, the lights should work without the resistor on B.
The L and H positions are for a three brush generator with a cutout relay only on the side of the gen. This depended on the operator to adjust the charging rate during the day to prevent overcharging (turning to L from H) A resistor is also used in that circuit, for the L position to ground the field through the resistor to ground. This is totally separate from the light switch connections. The same type 3 or 4 ohm resistor can be used for this, (could be 50 watt, but does not matter) wired in the same way. Use of a good ohm meter to make sure which connection is which is a good idea.
I would use a later model real voltage regulator to make it better, see Bob M's diagrams. JimN

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