Wiring an Older National Time & Signal Clock

Discussion in 'Clock Repair' started by pfizur, Apr 15, 2017.

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  1. pfizur

    pfizur New Member

    Apr 15, 2017
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    Disclosure: I know very little about clocks or wiring. My son is obsessed with clocks and really wanted a clock for home just like the one at his school. I purchased one from eBay and have ZERO clue how to get it running.

    I talked this through with a gentleman at Radioshack who gave me a plug and some wire connectors. He stated that I should strip the wires on the new plug and on the clock itself, stick the clock wires in one end and plug wires in the other, and I would be good. No dice. Here is an image of what I am working with, any help is greatly appreciated!

    View attachment 340353
     
  2. harold bain

    harold bain Forums Administrator
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    Have a good look at the motor on the clock. I suspect it may be 24 volts AC. It should give its voltage on the side of it.
     
  3. pfizur

    pfizur New Member

    Apr 15, 2017
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    Ah ha, you are correct, small black lettering on the motor itself suggest 24V. So this little 12V plug I have is just not giving me enough power, yea? Do you know if there is something similar that will put out the 24V this block needs? Any better solution?
     
  4. David S

    David S Registered User
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    Harold is correct, this is an AC motor. I believe that that the adapter you purchased has a DC output and is not appropriate.

    David
     
  5. David S

    David S Registered User
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    I recently helped a friend of mine with a low current application that required a 24v ac input and suggested an inexpensive door bell transformer. Work great. They have poor regulation and while sometimes rated at 16 volts they may give close to 24 at very little load.

    David
     
  6. harold bain

    harold bain Forums Administrator
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    You could buy a new 110 volt AC motor so you can plug it directly into the wall. What does your "12 volt plug" look like??
     
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