[sdiy] LM394 vs. MAT02 vs. ?

[Dana Scott]

Here we go, ARP questions. Now it's my turn.
The ARP PNP/NPN  pairs were never electrically matched at all. Just take two 
transistors and stick them together.
The ARP PNP matched pairs used in the later style VCF's were matched for 
similar current gains at 2 points. The LM3900 has current inputs so  the Vbe 
doesn't matter.
The clips were solid copper, not merely copper-colored.( Like that matters)!
-Dana


----- Original Message ----- 
> --- >> 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? The ARP VCOs I have seen (and
> heard) used a weird PNP/NPN pair. I have always wondered whether or not
> one simply goes for the same Vbe, as when measuring two transistors of
> the same type.