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AFCA Forums > Antique Fan Collectors Association > Post-1950 (Vintage) > Converting a 3 speed speed coil to a 2 speed speed coil?

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Converting a 3 speed speed coil to a 2 speed speed coil?  Rate Topic 
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 Posted: Mon Jan 7th, 2019 01:18 am
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Levi Mevis
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Joined: Tue Feb 24th, 2015
Location: Elkhart, Indiana USA
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Hello everyone, recently I posted about my late 1940s Westinghouse LivelyAire that had a bad speed reduction resistor in the base and I was trying to figure out the best way to get the low speed back up and running again on my fan, and I considered ordering a new resistor (I actually found several good possible replacement resistors online for inexpensive) but then I remembered that I had a 3 speed speed coil that I salvaged out of an old Spartan Fan that had a broken oscillator gearbox which made it so it wouldn't work anymore so I slavaged the 3 speed switch and the speed coil out of it. And I was thinking maybe I could take and use that 3 speed speed coil as a 2 speed speed coil by wiring up the low windings and tying off the medium speed windings.
My first question is, is it even possible to wire up a 3 speed speed coil to only function as a 2 speed speed coil?

My second question is, If it is possible which wires coming off the speed coil to I tie into the switch and which ones do I tie off? I know the original speed reduction resistor for this fan which served to achieve a "low" setting had two wires on it, so would it be safe to assume that the 3 speed speed coil also has 2 wire leads for low and the third wire is for "medium" speed? If so would I measure the resistance of the wires coming off the speed coil and then find the 2 wire leads that have the lowest resistance would be the low setting and thus would be the two wire leads I need to wire into the fan's wiring?

Thanks for the help in this question.

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 Posted: Mon Jan 7th, 2019 11:15 am
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Rick Huckabee
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Yes it can be done. ohm out your switch and document all readings from one tap to the next and decide which ones you want for your speed control and tape back whichever tap you do not use, or use some jumpers start-up and run your fan alternating the taps until you find optimal speeds and tape off whichever you do not use. I do this sometimes with an unknown . I wind up a coil with different amounts of turns 100-100-100-150-150-200-200 , as an example then put it all together and run the fan using different combination of taps until I get a desirable or optimal run. Sometimes I have to wind up two or three until I find the sweet spot.

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 Posted: Mon Jan 7th, 2019 11:25 am
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Levi Mevis
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Joined: Tue Feb 24th, 2015
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Thanks Rick, I figured you would probably know out of anyone on here.

Anyways the speed coil in question I tried to test the different leads and I didn't get any readings and I know the speed coil is good yet, is there something I'm doing wrong that I'm not getting any ohm readings from the speed coil?

Also the original Speed Reduction Resistor in my Westinghouse LivelyAire had 2 wire connections, how exactly would I go about getting those two wire connections by converting the 3 speed speed coil (which has 3 wire connections) to a 2 speed speed coil if I only need one of those connections from a 3 speed speed coil to make a 2 speed fan if I'm understanding you correctly? 

Or Am I completely misunderstanding you?

Thanks,

Levi 


Last edited on Mon Jan 7th, 2019 04:48 pm by Levi Mevis

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