The owner requested replacement of a couple of pots and unusually requested
the amp be blown out. Being unusual request I enquired what is likely to be
in there requiring blowing out but he seemed a bit cagey.
Inside there are perhaps tens of thousands of precisely 2mm long black
fibres, about human hair thickness. I first thought chopped strand
carbon-fibre but these are less tham 30 Megohm resistance , isn't carbon
fibre conductive?

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/