Cannot be sure the filters make any difference here as everything in the shack is well ferrited and well grounded to my external earth and ground system in the back garden so I have no severe interference problems apart from occasional static type interference from electrical applicances in people’s home seemingly coming in via the antennae. My next door neighbours fairly new central heating boiler radiates a 16.5 KHz spaced hetrodyne through the HF spectrum which the notch filter deals with if it drops on a station of interest. She is elderly and a good neighbour, she let me in to the house with the KX2 about 18 months ago and this proved that it was the Vailant Ecotec plus 418 central heating boiler that was to blame. Nothing can be done about it - as I am not the customer the firm ignore my emails.
Parts list here:
Fair-Rite ferrite clamp on cores low & BB Freq 31 Mat (Bought Jan 2019)
Fair rite ferrite cable cores 43 Full flat cable core (2 needed per filter)
Schaffner power line line filters 16A fast-on (1 per filter)
Hammond RL6465-F Flanged ABS wall mount instrument enclosure 150L X 100H X 90W - box width very tight - only just accomodates ferrite filters when wound.
Schneider Electric GGBL3010S LWM 1 gang 13A switched mains socket
Cable - domestic appliance sized 3 core mains cable - I had that in stock. Clip on ferrite just accommodates 7 twisted turns of that sized cable. Any thicker and you would struggle to get 7 turns through the middle.
Volt drop through filters off load is approx 1 volt when tested. 232V in 231V out.