[sdiy] LM394 vs. MAT02 vs. ?

[Roy J. Tellason]

On Friday 05 November 2004 10:59 am, Metrophage wrote:
> --- "Roy J. Tellason" <rtellason at blazenet.net> wrote:
> > The ARP stuff I used to work on did some that way,  and some with
> > little copper-colored clips...
>
> How did the matching go with those?

They were matched and put together when I got 'em.

> The ARP VCOs I have seen (and heard) used a weird PNP/NPN pair.

Yeah,  they used either 2N3904/2N3906 or TZ81/TZ581.

> I have always wondered whether or not one simply goes for the same Vbe, as
> when measuring two transistors of the same type.

I have no idea.  I have a curve tracer,  and some time back hooked up a 
"matched pair" of ECG power transistors -- the unit has two sets of 
connections and a switch to go back and forth -- and I couldn't see how they 
were all that well matched,  but I don't know what characteristic they were 
supposed to be matched for.