In a message dated 11/3/2006 12:06:59 AM Central Standard Time,
tr3driver@comcast.net writes:
> >Radio Shack has a 25 ohm 3 watt rheostat for $3.99. Would that work?
>
> I'd have to make some measurements to be sure, but offhand I doubt it. I
> think
> it would dissipate more than 3 watts; and the motor wouldn't turn at all
> with
> only 25 ohms in the circuit.
>
> With the motor not turning at all, and the control set to 25 ohms, it's
> dissipation would be closer to 6 watts than 3.
>
Go to www.mouser.com and search on rheostats. Then select Rheostats and then
apply a filter on the desired resistance. ISTR that the fan rheostat was 1.5
ohm and the dash lamp dimmer used on later models are 3 ohms but I may be off
by an order of magnitude. The 12.5 watt rheostats range from $21.
I don't know if it will fit the dash and the connections to the harness will
have to be worked out. But Yankee ingenuity will prevail.
Dave
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