[Philips210]

Hi.

I've also found hum problems when experimenting with small AM transmitters and must try out the suppression cap trick in the mains plug for a number of locations throughout the bungalow.

I guess for safety reasons it would be a good idea to fit say a 1A fuse in the plug in the event the cap goes short circuit. Those polypropylene caps rated at 1000VDC seem a better bet than the normal class X types provided they will fit in the plug body.

I was also wondering if a bleed resistor of say 1M Ohm across the cap is needed to prevent getting a belt after removing the suppression plug and touching the live/neutral pins. Those blue Vishay metal glaze resistors (VR37 series for example) are often used in this application.

Regards,
Symon