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Article #1260

Re: Tingles from power supply

#1260
From: FunkyPunk FieldEffectTrollsistor
Date: Thu, 12 Mar 2009 09:21
34 lines
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On Thu, 12 Mar 2009 17:51:54 +1100, "Mr.T" <MrT@home> wrote:

>
>"FunkyPunk FieldEffectTrollsistor" <FunkShunPoignter@yermomma.org> wrote in
>message news:emahr4duhmblpe0smd6rlk0h8apkdhg5ja@4ax.com...
>>    Yes, most outlet hung devices do not have said filtration, and most
>> are not switchers either... but a few are.
>
>In fact many, if not most new manufacturer supplied plug packs are switchers
>these days. The cost is now similar, with the bonus of less weight, and
>usually universal supply voltage.
>
>MrT.
>
>

  All but the big name boys buy from an OEM supplier, and even some of
the big guys do as well.

  The small wall hung jobs only are switchers if the power need calls for
it.  If it a simple trickle charger or other such low draw device, you
will still find the old style in use. Also true if ripple figure does not
pose a problem, like in cases where the regulation circuitry is in the
device.  It is cheaper, and Chinese makers ship by the container full,
with weight only adding to cost when it is overtly different.
There are even AC 'feeders' for this purpose. Particularly since OEMers
still have tens of thousands of them on hand.

 As you know, end of year inventories do not have the same consequence
over there as it does here, so an order for 100k of something might cause
an mfg run of 140k pieces.  So there is surely a huge glut of the old
style devices still available.  Also, transformers themselves are still
very cheap, and get made in even bigger quantities on practically
unattended machines.
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From: FunkyPunk FieldEffectTrollsistor <FunkShunPoignter@yermomma.org>
Newsgroups: sci.electronics.design,aus.electronics
Subject: Re: Tingles from power supply
Organization: SmokeOnTheWatter.org
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Date: Thu, 12 Mar 2009 02:21:33 -0700