[sdiy] NPN/PNP matching for expo converter

[Tom Wiltshire]

There's tons of stuff on transistor matching in the archive:

http://search.retrosynth.com/synth-diy/

Whether you match for Vbe or hFE depends on the circuit. I couldn't tell you for the Maestro phaser.

HTH,
Tom


On 18 Apr 2012, at 03:18, aankrom wrote:

> I'm considering building one of the Maestro phasers and noticed that each one has a 2N3904/2N3906 that are "matched." When matching NPN to PNP are you going for close hFE's?
> 
> AA
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