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From: firstname.lastname@example.org (Bob Wilson)
Subject: Re: Lengthening wires in computer power supply
Date: Thu, 12 Sep 2002 03:09:10 -0000
Organization: Your Organization
X-Newsreader: WinVN 0.99.9 (Released Version) (x86 32bit)
References: <email@example.com> <firstname.lastname@example.org>
In article <email@example.com>,
>firstname.lastname@example.org (Bob Wilson) wrote in message
>> In article <email@example.com>,
>> firstname.lastname@example.org says...
>> >Hi - I would like to lengthen all of the wires that are connected to
>> >the heatsinked transistorsin in my computer's power supply by about
>> >6cm. Would this cause any problems?
>> What wires? The heat sinked transistors in a PC power supply are soldered
>> directly into a PCB. The only wires are the DC output wires, and these
>> can make as long as you want.
>I was hoping to be able to use the heat sinked transisitors. I was
>hoping to desolder them from the PCB and add some wires in their
Don't, unless you know something about the basic concepts of switchmode
power supply design. And even then, don't.
The long lead length (especially to the bases of these transistors (and thet
ARE NPN transistors, not FETS) can easily cause all sorts to spurious
problems. Power supply designers don't go out of their way to put drive
components REALLY close to the power transistors for no reason at all!
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