Is anyone aware of a wall mounted volume control that has a smooth rotary dial? As it is it seems every one that I have found is a 'notch' type rotary dial, such that there are 10 discrete volume levels etc, rather than a traditional smooth rolling type. Thanks!
Generally they step because they are NOT simple potentiometers as might be used for the volume control on a electronic device but are instead multiple position switches selecting between taps on a transformer.
These devices allow you to connect multiple sets of speakers to an amplifier and insure that amplifier sees a suitable impedance.
If you only need to control the volume when connecting a single set of speakers to an amplifier there is a device called an L-Pad which is usually not stepped.
I would assume that if manufactorers are able to produce sliding volume controls, the same scheme could be adopted to a rotary dial?? If not, how does a sliding control work.....Maybe varying the load position on the windings? Seems like that could be done on a rotary dial also..