I've just plugged in a Quad 34 preamp that's been unused for a few
years. When I turn the volume control up there's a series of loud high
pitched clicks through the speakers, a bit like LP static discharge
maybe. It was fine last time it was used.

Does this sound like an expensive problem, or would I be better off
punting it on ebay, and buying another (about £80 it seems)?

Thanks, Rob