Active gain boost question

[Sunsett]

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Hey folks,
Normally I’d just pick up the phone, but it’s Saturday and EBMM is closed.
Q: re active gain boost on L4…does plugging an instrument cable into the jack pull juice from the 9v battery like an an active pup set up would?
TIA

 

[Iperfungus]

Yes. Plugging the cable turns the circuit on, draining power from battery.
The stereo jack connector acts like a power switch:

Cable plugged = on
Cable unplugged= off

 

[Sunsett]

A big “thank you”…

 

[Iperfungus]

Welcome!
You can see how it works here, in attached document.

The boost should be factory set to +12dB, but it can be adjusted with internal trimpot up to +20dB (I didn't on the Luke III, since it could be too much...).

 

[Sunsett]

Thanks for the welcome and the schematic. I have the gain boost set 1/8 turn from full. It’s perfect for L4>2i2>Reaper>NeuralDSP plugin>Adam7ax

But the live rigs could be another story. I’ll be test driving those setups shortly