Author Topic: Wiring for Modern Clock Co Radio Ad Clock  (Read 86 times)

Duncan

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Wiring for Modern Clock Co Radio Ad Clock
« on: June 06, 2017, 11:01:38 AM »
I am restoring a Modern Clock Company Radio Advertising clock.  The way the clock is currently wired, when it is plugged in both the clock and the light come on.  The light is a fluorescent fixture not neon  :'(

I want to add an on/off switch for the light.  I have purchased a period repro rotary switch with two leads that will be installed on the outer can of the clock. I see that the plug leads go one each to the clock motor.  One also has a lead to the ballast (black wire).  The other has a lead to the ballast (white wire) and to the fluorescent plug.  So I see three places I could put the switch...the black ballast wire, the white ballast wire, and the fluorescent plug wire.

My question is which wire should the switch be placed into to control the light on/off?

Thanks!

cable ulysses

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Re: Wiring for Modern Clock Co Radio Ad Clock
« Reply #1 on: June 06, 2017, 12:56:02 PM »
Put a switch in either the black or white lead to the ballast if the plug is unpolarized (no ground).  If it's polarized, switch the black lead to the ballast (that's the "hot" side rather than the "neutral" side if the thing is wired correctly).  You want the motor to be unswitched, obviously.  ...At your own risk...
« Last Edit: June 06, 2017, 04:52:49 PM by cable ulysses »

Duncan

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Re: Wiring for Modern Clock Co Radio Ad Clock
« Reply #2 on: June 06, 2017, 07:30:40 PM »
Cable,

Thanks!  This pretty much answers my question.  I will post a copy of the final wiring when I am sure I have it right...if I can get photos to post!  I always have trouble with photo size here!

Thanks again!!