Super handy and useful Synthie-Tuner and an Oscilloscope in 4HP.

The output is a buffered sibling of the input.

The potentiometer adjusts the level of the incoming signal to the scope.

On the mainboard is another tiny potentiometer to adjust the level of the incoming signal to the tuner.

4HP

Depth 40mm

+12V 53mA

-12V 8mA