When patching to CV inputs on Ciat-Lonbarde instruments (Cocoquantus, Plumbutter, Sidrax) it can be useful to add some attenuating ability. For example, if I want to control the frequency of a Sidrax oscillator from a Castle output of Cocoquantus, I want to vary the depth of modulation. There’s no attenuator on the CV input. Hence: Inline Attenuator in a small box with two banana jacks.
The little box comes from Small Bear Electronics, part number 1090NS.
This is not a potentiometer, i.e. there is no ground connection. It is simply an inline variable resistor. It also works well for patching a CV coming out of the modular into a Ciat-Lonbarde instrument. The CV inputs on Ciat-Lonbarde are very high impedance (often 1M ohms). And they expect a relatively high output impedance (10K ohms) to drive them. If you patch a very low impedance CV (like the 1K standard for modulars) or a pot with a grounded end, the current is pulled down so much that control can be ineffective. So here I have used a 1M audio taper pot as a series resistor. It can go down to zero resistance. It’s wired so that as the knob is turned clockwise, the resistance decreases. Full anti-clockwise does not shut off the CV, but only maximizes the inline resistance to 1M.