[GreenKeys] M28 Selector Magnets

[Ralph Mowery]

I do not have a M28, but from what I have read, I thought they had their own selector magnet loop and it was triggered from the extrernal source.  That would make the wiring of the magnets totally differant, but not depending on the external loop current.

The older M 15 teletypes did have the series or parallel wiring depending on 30 or 60 ma circuits.
I do not think the M 15 series used 20 ma, but did use 30 ma sometimes.


  ----- Original Message ----- 
  From: DR HOUSE 
  To: Steve Garrison 
  Cc: greenkeys at mailman.qth.net 
  Sent: Sunday, August 21, 2011 11:38 PM
  Subject: Re: [GreenKeys] M28 Selector Magnets


  The magnets are wired in series for 20-30 milliamp service.
  The magnets are wired in parallel for 60 milliamp service.

  Don
  K9TTY