I was wanting to construct a "fuzz" distortion guitar pedal, but being indecisive, I wanted to be able to change the type of transistors in the circuit at will.
I found the idea of using a double-pole rotary switch to switch in and out a multitude of different transistor or capacitor configurations, allowing for a highly customizable tone.
Credit to randofo of Instructables.com
However, I was wanting to instead use a thumbwheel as it has more positions and is more readily available, the difference being, they are only single-poled. I don't think this would have an effect on switching out the capacitors as I could easily make one leg common and have the other leg attached to the respective switch position, but because the transistors are active, multi-legged components, I'm not sure of the wiring configuration.
Would it be best to switch out the Emmiter, Collector or the Base? I think I can see a noise-problem occurring by having a bunch of transistors in my circuit where all but one have a base hanging in an open-circuit at any given moment.