[R-390] Another xfmr question

[B Riches]

I think if the core is not saturating it will be ok.  A way to see if =
the core is saturating at the higher voltage  winding  - hook up the =
primary  (110 ac winding) in series with a 50 watt light bulb.  Connect =
nothing to the secondary.  Hopefully the bulb will not light or just =
glow dimly.  Now reverse the procedure - connect the power and bulb to =
the 104 volt winding.  If the bulb is no brighter or just a little =
brighter or hopefully if it is a real good transformer the bulb should =
not glow - your can use the former to drop the voltage.  BE CAREFUL - =
YOU COULD BE KILLED IF THE JUICE GOES THROUGH YOU.

73,

Bill Riches, WA2DVU
Cape May, NJ
  ----- Original Message -----=20
  From: Scott, Barry (Clyde B)=20
  To: R390 (E-mail)=20
  Sent: Wednesday, November 05, 2003 11:50 AM
  Subject: [R-390] Another xfmr question


  At the risk of being chased off the list...

  http://www.belfuse.com/Data/DBObject/pgs28_29.pdf
  The same transformer in question 1 has a primary tap at 110VAC.  Is it
  unadvisable to run the primary at this tap given a line voltage of =
123VAC?

  Using the 120VAC primary, the 110VAC tap is a bit too low.  I was =
thinking
  if I run the primary at the 110VAC tap and use the 104VAC secondary =
tap, I
  might get closer to 115VAC on the output.

  I assume this isn't as horrible as my first question, but I assume =
there are
  some drawbacks to this plan as well.  Is it simply an effeciency thing =
that
  won't harm the transformer or is there more smoke risk?

  Thanks again guys,

  Barry(III) - N4BUQ
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