[paulsherwin]

I agree, test equipment tends to use much better quality caps than normal domestic radios and TVs.

The advice to change all wax paper caps is given because they all tend to leak sooner or later. It's difficult to test them reliably out of circuit and they can cause all sorts of weird faults.

There is normally no need to change RF caps, which generally use mica or ceramic technology and don't leak (they're often not exposed to much voltage anyway).

Paul