handsome

I would suggest using polystyrene caps as they are extremely stable (no capacitance variation with frequency) and available in 1%...

Measure the voltages with globe in circuit and ascertain if digital circuits are getting the required voltage - if they are you can...

On and off is usually harder on the equipment. Valve heaters when cold, have a very low resistance, so at switch-on a larger than normal...

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12VA / 220V = 55mA that is enough to stop your heart. They only way to stay safe when working on mains connected apparatus (valve or...

Ha - not going to ask what kind of music is noise! The filter aims to prevent interference from getting into the cable

Attempts to prevent interference getting into the cable and interference getting out of the cable.

The above measurements show that the difference in sound is die to the listeners ears - which is exactly what the Fletcher-Munson curves...