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From: "Phil Allison"
References: <3E1CD631.7F015840@rica.net> <3E1E6684.3BEF12AA@rica.net> <3E205173.AE9EDF92@rica.net>
Subject: Re: PSU's: Exceeding transformer rated current
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Sat, 11 Jan 2003 10:10:48 +1100
NNTP-Posting-Date: Sat, 11 Jan 2003 10:00:27 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"John Popelish" wrote in message
> Phil Allison wrote:
> > ** I placed a 6.8 volt, 3 watt zener in series with the primary.
> > creates a DC component in the supply and did appear to compensate for
> > effect of the half wave secondary load.
> > I tried the same set up with a 160 VA 36 volt toroidal and got
> > text book results in terms of waveforms.
> With reference to the toroidal transformer: Was the text book result
> with or without the zener?
** With of course.
An for those of us without the test book,
> please describe the waveforms. Thanks.
** The toroid's primary current was a perfect half sine - there being no
magetising current to confuse the matter. I use a LEM LTA 50P hall effect
transducer to monitor and measure such things.
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