[sdiy] Funky Beta

[Dan Snazelle]

on my cheapo meter you have to push the legs of the transistors away from you a bit toward the body of the meter till you get a reading
i usually get too low or too high a reading when i first put it in and once i have it in the right way and push it, i get an accurate (i hope) reading



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> Date: Sun, 22 Jun 2008 00:57:01 -0600
> From: sounddoctorin at imt.net
> To: lightburnx at yahoo.com; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Funky Beta
> CC:
>
> Hard to say. I've seen power transistors in the past that measure
> horrible...like..2....1.... for things that should be 15 minimum. And
> in trying one in a fix it blew out. I'm convinced they were floor
> scrapings that hosfelt electronics got ahold of and sold as 2n3055's way
> back when. Anyway it could be the meter. It could be you are putting
> them in wrong. Trying to recall if those two have the same base
> diagram...or..they could be real floor scrapings :-) -Bob
>
> Kyle Stephens wrote:
>
>>I've been working on a PNP-NPN expo converter. Knowing it's conducive to the unit doing its job if the transistors involved are beta matched, I started running the transistors I had (2N3904s and 2N3906s) through my new multimeter (it has an Hfe test socket). The meter is a cheapo one I should say.
>>
>>The 3904s had numbers between 100-199, nothing below three digits. The 3906s however were far more measly. Like 6...5...8... nothing above a 9.
>>
>>Any idea what's going on?
>>
>>
>>
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