Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!ucsd!ucsdhub!hp-sdd!hplabs!hpda!hpcuhb!hp-sde!hpfcdc!hpfclm!myers
From: myers@hpfclm.HP.COM (Bob Myers)
Newsgroups: sci.electronics
Subject: Re: Flyback Transformers
Message-ID: <1320008@hpfclm.HP.COM>
Date: 28 Jul 88 18:08:08 GMT
References: <14741@shemp.CS.UCLA.EDU>
Organization: Hewlett Packard -- Fort Collins, CO
Lines: 20

A flyback transformer is that little odd-looking transformer that makes the
high voltage (CRT anode voltage) in your TV set - at least, that's one
example.  It transforms the high-voltage (several hundred volts, typically)
spike produced by the retrace, or "flyback", of the horizontal coils in the
deflection yoke.  (This spike results from attempting to quickly reverse the
current in this inductance - V = L di/dt, right?)  Hence the name.  Used quite
often in situations like this, where you need a high voltage at relatively low
current.

Unfortunately, I can't help the original poster in his search for a replacement
part - there a literally hundreds of companies, many quite small, making
magnetics for consuumer equipment.  If the transformer you tried seems to 
be working OK (not running too hot, sufficient brightness, and the anode
voltage to the CRT is not over nominal - excessive anode voltage produces
excess X-ray emissions), then I wouldn't be too worried about it.


Bob M.

hplabs!hpfcla!myers