[sdiy] Funky Beta

[Bob Weigel]

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?
>
>
>      
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>  
>