[sdiy] SSM2220 dual PNP clones?

[Louis van Dompselaar]

Although it is my understanding that transistors from the same batch  
that
are close in beta are likely to be close in Vbe as well.  If that is  
the case then
matching beta might be a good first approximation.

Or would the diode tester give a better match for that?


> You would need to match Vbe for a given collector current. Beta  
> itself is relatively unimportant, which you can see from the fact  
> that it doesn't show up in the equations describing the exponential  
> convertor.
>
> If you want to short cut it using a DVM, then use the diode tester.  
> (Effectively matching Vbe at Ic = 0)