Re: lucky MOSFET find

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Steven Ward" <srward16-at-hotmail-dot-com> 

Nice find!

Usually, if the contacts do not read short circuit to each other (but like 
1-2k between D and S) then they are ok.  Im pretty sure mosfets always fail 
short circuit, or they explode (open circuit :)).  You can probably verify 
that they are worth trying, simply with your multimeter.

Steve Ward


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: lucky MOSFET find
>Date: Thu, 21 Aug 2003 12:07:28 -0600
>
>Original poster: Finn Hammer <f-h-at-c.dk>
>
>Gang,
>
>Just as the human eyes adjust to the conditions of the available light,
>they adjust to spot the contour of parts that are needed for current
>projects.
>Like today, when I took a stroll on the local scrapyard, and suddenly
>found myself staring at a heap of IXYS IXTN79N20 MOSFET`s carefully
>removed from what appears to be working equipment.
>
>I grabbed 30 pcs. and wondered if they could be made to do service in an
>audio modulated SSTC, for example.
>
>They don`t appear on http://www.ixys-dot-com
>but from the type markings they appear to be 79A 200V types.
>In the unloaded state, the Gate-Source capacitance is 17.7nF, but this
>might change.
>
>How do i test them?
>
>I tried hooking one sample up to a motorcycle lead battery, and apply 12
>volts to the gate, that caused current to flow, so that the isotop
>casing got hot, didn`t break it.
>
>But there has to be a better way, and I don`t want to break my
>Plasmatronic board by just plugging them in, to see what happens.
>
>Cheers, Finn Hammer
>

_________________________________________________________________
Get MSN 8 and enjoy automatic e-mail virus protection.
http://join.msn-dot-com/?page=features/virus