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Emerson Switch Compatability  Rate Topic 
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 Posted: Tue May 29th, 2018 09:15 pm
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Rick Powell
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It is my understanding that Emerson switch’s are interchangeable on the 14646-29646, what switches are interchangeable with “45” series fans?  Also what switches are interchangeable in the 16” fans?  
Thanks 

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 Posted: Tue May 29th, 2018 09:40 pm
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Chris A. Campbell
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I think 14644, 19644, 21645 are interchangeable.

Unsure about 19645 , 24645 or 29645

Are you trying to locate the 19645 switch? If no one is sure I will pull my 19645 and compare to 21645 and 29645

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 Posted: Tue May 29th, 2018 10:25 pm
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Rick Powell
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Thanks Chris for the offer, prior to you taking your fan apart maybe someone will provide some insight on them, if not I would appreciate it. Yes I am trying to find the correct switch for the 19645 but I am also curious on all of the switch compatibility, I have about a dozen 29646 switches I bought from a retiring collector that he kept as spares, not sure if he loved restoring 29646’s or had them for their interchangeability.

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 Posted: Tue May 29th, 2018 10:54 pm
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Chris A. Campbell
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I was curious so started swapping around switches.

First of all the switch in my 19645 is stamped 24645. It was sent to me as a reassemble project but the switch does fit. Will need correct number of turns before rewinding my choke

Pulled switches from 21645, Northwind 450, and 29645

All switches fit in the base and holes line up with identical base heights. There may be differences in laminate stack heights.

Also the individual laminates from my 21645 seem identical to my 9"  29645 and 12" 29646

In theory you should be able to take the laminates from your spare 29646s and stack on a switch base from a Northwind 450 with a new choke designated for the 19645. Be sure to cut the bridge on contacts used for Northwind resistance switches. 

If anyone has wound a 19645 and knows specs on laminate stack height along with magnetic wire gauge and number of turns I would be more then happy to wind a second choke and fit to your spare 12" laminates attached to 9" switch base

I have just pulled one Northwind switch so there may be variations but you need a second set of holes for the screws that hold the paper switch cover. These arent present on the switches from 27645/ 29645 that use a felt cover

24645, Northwind, 21645, 29645

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Last edited on Wed May 30th, 2018 03:07 am by Chris A. Campbell

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 Posted: Tue May 29th, 2018 11:33 pm
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Chris A. Campbell
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19645 with a 29645 switch

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 Posted: Tue May 29th, 2018 11:34 pm
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Chris A. Campbell
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19645 with a Northwind 450

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 Posted: Tue May 29th, 2018 11:50 pm
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Russ Huber
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16" Emerson switches have critical melt down issue to remember.  NEVER interchange a Emerson 16" small motor speed coil in a Emerson 16' BIG MOTOR.  That BIG motor will suck the life out of that small motor transformer until you can cook an egg on it.  :D


Swapping transformers from one 9" to another 9", or 12" to a 12", or 16" to a 16" of equivalent motor size and pole count should work. Why not? You may not be able interchange the switch, but the transformer is what does the magic.   

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 Posted: Wed May 30th, 2018 12:11 am
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Russ Huber
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Chris A. Campbell wrote: 19645 with a Northwind 450
Good one.  The Northwind 450A and 450B also sport identical components for the 45 series pivot knuckle, adjustment collar, connecting link, and the ever so precious ball detent/ratchet case for the 21645 and 24645 

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Northwind.png

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 Posted: Sun Jun 3rd, 2018 12:32 am
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Edward Stokes
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Chris A. Campbell wrote: I was curious ...

...If anyone has wound a 19645 and knows specs on laminate stack height along with magnetic wire gauge and number of turns I would be more then happy to wind a second choke and fit to your spare 12" laminates attached to 9" switch base...

Chris, I rewound a 19645 speed coil a couple of weeks ago.  I’ve only rewound two other coils and this is my first Emmy.  This one was the most difficult since it was in such bad shape.  The following explains what I did and what I know in case you can use any of this, and that other people can add anything, make suggestions or learn anything.

I didn’t have access to a multimeter before I started and having initial measurements would have been useful.  However, I was able to tell that the middle speed tap #2 (Medium) was open, and all others had continuity.

Due to difficulties unwinding from the outside “Floating Tap” I had to estimate the number of turns before the next tap (#1 High) was between 320 and 345 turns.  I chose to use 345 to be safer and perhaps help with today’s higher voltages.  I couldn't find the #2 tap.  The total number of turns to the other end (#3 Low) tap was about 775 turns.  So, from taps #1 to #3 there were 430 (775 - 345)  turns.  I decided to put the #2 tap in the middle at 215 turns from #1 and #3 (430/2) as a first attempt.  

Stats:

Magnet wire - 28 AWG

There are 37 plates measuring 3/4" (Not counting 2 end-pieces that hold the plates together). Is this what you need?

  From Tap to Tap           # Turns
  ----------------------      -----------
   Floating Tap - #1           345
       #1 - #2                    215
       #2 - #3                    215
  _____________________
                     Total:        775




Resistance Measurements:

  From Tap to Tap           # Ohms
  ----------------------      —————
   Floating Tap - #1           8.2
        #1 - #2                   4.3
        #2 - #3                   4.3
  _____________________
                     Total:       16.8


Speed Measurements @ 110V AC:

  Speed                RPM
  ———              ———
    #1                  1630
    #2                  1570
    #3                  1420

Note: Since the number of windings between #1 to #2 and #2 to #3 is the same I expected the #2 speed to be a about half.way between 1420 and 1630 or 1525 RPM.  If you compare the number of turns between each tap to the total number of turns and the Ohms between each tap to the total number of Ohms the numbers are quite close.  Any ideas?  (Yes, I probably did something wrong again.  I need to find a simpler, less expensive hobby!)

I ran the fan for about an hour before I reassembled it.  The speed coil and the motor only got slightly warm.  The fan starts well, and there is reasonable separation of speeds.  I didn't start any fires or get electrocuted, so I think it's O.K.

Hope this helps.



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 Posted: Sun Jun 3rd, 2018 05:17 am
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Chris A. Campbell
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Than you Edward!

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