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Cgs synth

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vca bc548 question

2012-12-20 by adematteo

Hi guys,
I recently built up the vca3 boards and didn't realize until after the fact that it's recommended to match the bc548's.

The fact that it's mentioned on Kens page makes me wonder if i should pull them and match them (ie. how critical is this ?) ?

Which leads to my second question what are we measuring and how are we doing it ?

I planned on building up Ian Frijtz's Transistor matching circuit for the dual transistors on this and the vco boards so would i be able to use this circuit to match the bc548's as well ?

Thanks for any insight you guys can offer,
-Tony

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