K9AY and Bi-dir beverage controller

This revision is from 2018/09/18 21:45. You can Restore it.

K9AY and 4-way Bi-dir beverage Controller(Edit)

Internal BPF and preamp PCB - OPTIONAL(Edit)

Preamplifier GAIN(Edit)

With the variable ATT you can set gain of the Preamp as you need.
Range is 0 to 17 dB
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