I currently use an sound hole single-coil magnetic pickup on my acoustic guitar so that I can get both a good "acoustic" guitar sound and so that I can drive electric guitar effects pedals.
In some venues, however, either radio frequency interference (RFI) or noisy AC power sources (light faders in the circuit, for example) cause a lot of noise to be generated either in the pickup cable or the cable itself.
I have a noise-gate pedal that I can use but it can be difficult to tune it so that it doesn't squelch soft passages, particularly when there's a lot of signal noise.
What are some other ways of reducing noise with single coil magnetic pickups?