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#11576
Cybercow
Moderator

Bossebas – the trimpot is there for biasing Q2 & Q3. Here’s the bit from the build document about TR1 . . . .

“*TR1 – The bias trimmer aka; Sensitivity controls the filter resonance frequency. When Sensitivity is turned fully off the Bias can be used as a sweepable filter.”

Hope this helps.