Hairball Audio - Rev A Rack - Q12 - Q13 Transistors
« on: September 04, 2018, 02:35:32 AM »
Question about Q12 Q13 Transistors

In the hairball build guide it says  on Rev A & D that Q12 AND Q13 will arrive matched and taped together.
However on the components guide that comes with kit it says these transistors (J309) the ones that are taped Should be placed in Q2 AND Q4

Anyone have any light on this.?

Maybe they have come mixed up?



Re: Hairball Audio - Rev A Rack - Q12 - Q13 Transistors
« Reply #1 on: September 04, 2018, 06:56:43 AM »
I think there are, normally, two pairs matched. One pair are the 2N5457 transistors, de ones that do the gain reduction (Q1, Q11). There are another pair matched that are  2N3707 (Q12,Q13) on meter section. That are on rev D for sure, I dont know if rev A is the same...


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