Gareth Magennis wrote:


I only want to blow the dust out of a power amplifier occasionally.
I can buy a can of air do do that, but it is expensive.


** You are labouring under a misconception.

So called "air duster" is not air, but liquefied gas - normally a fluorocarbon.

This allows a small can to hold a useful amount of gas, about 200 litres. A bottle of compressed air would be hold only a few percent of that amount with rapidly diminishing pressure as it is used - IOW almost useless.

You need a continuous supply of compressed air for your tasks.

The usual way to clean a fluff & dust clogged power amps is with a vacuum cleaner and a soft brush. A damp cloth gets most of what is left over.

In cases of sticky contamination or carbon soot from a fire only disassembly and washing in warm water and detergent works.


..... Phil