Triple attenuator, inverter, attenuverter and offset / DC voltage source

The three well-spaced knobs can act as active attenuators, attenuverters (bipolar) and inverting attenuators depending on the three position switches.

Each input is normalled to a DC voltage but this voltage is selectable for each channel to be 5V or 10V via jumpers. So with nothing plugged into the jacks, each knob controls a voltage amount. So if the rear jumper for channel A was set to 5V then the knob A would control the following ranges on Output A:
position 1: 0 to -5V
position 2: -5 to +5V
position 3: 0 to +5V

- Skiff friendly (single pcb)
- Panel mounted pots with a lot of space so it is easy to interact
- 3 modes for each channel
- 5/10V normalling to inputs
- With external signals it acts as active/buffered attenuator/attenuverter/inverter