[GreenKeys] teletype motor with the 'night light' on it!

[Ralph Mowery]

At 60 Hz there is not enough flicker from the incandescent lamp to work a strobe disk.  At least not any modern lamps.  If there is any flicker then there would not be any need for the tuning fork/shutter to set the speed of the governed motors.  

I have not been around any 25 HZ power, but have heard that there is often enough flicker in those lights to cause many people problems.

I still have one of the turn table disks around and have used it some way in the past to check the speeds. It takes a neon bulb or some other gas filled tube operating off the 60 Hz house current to make it work.  It will not work under any standard low wattage incandescent lamp.

  ----- Original Message ----- 
  From: Richard Knoppow 
  To: greenkeys at mailman.qth.net 
  Sent: Saturday, February 27, 2016 11:28 AM
  Subject: Re: [GreenKeys] teletype motor with the 'night light' on it!


     At 60Hz there is enough flicker from a low wattage incandescent lamp to work a strobe disc, for instance the little discs once sold for checking phonograph turntable speed. 
     BTW, when I was a kid my parents visited the Canadian side of Niagra Falls, the power there was 25Hz, I could never get quite used to the flicker. 

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