Thank you to all who have contributed input.I mistakenly referenced using a potentiometer when it should have been a rheostat. It looks like I have used 2 terminals of a potentiometer as a rheostat in low current circuits (like Curtis/PB-6 style 0-5k throttles) for enough years that they became synonymous in my mind. They are related but different components.
I will report back after I get the conversion installed and test, but for future researchers:
The E15 used 80 ohms of resistors (+/- 10%) for max field weakening. A rheostat with a 25w rating should be durable enough for the task. Tim M On 6/19/2017 1:59 PM, Tim Maxwell wrote:
I am considering putting a Curtis 1204 (sitting on the shelf collecting dust) in an E15 (most of card 1 has been bypassed by the PO due to failures).I vaguely remember reading somewhere about a user putting a potentiometer in the field to provide a variable "turbo mode."The resistors on card 3 are 20 ohm 10%, but what wattage are they? IE what watt rating would the potentiometer need? Tim M _______________________________________________ Elec-trak mailing list Elec-trak cosmos phy tufts edu https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak