Tuesday, July 09, 2024

Broadband RF generator (AKA eBike charger)

My new eBike came with a charger. Even though it's about 10m away from my ham shack the radiated noise level is impressive. 

Here's the "transmitter":

Here's the inside view:

Even with external clip-on ferrites on the mains and output cable there is little difference. How can it be legal to sell noise makers like this? Are all the certifications fake or just incredibly poor standards?

As Ralph, VK3ZZC, suggested I have added 0.1uF silver mica capacitors across the large electrolytic smoothing capacitors on the output and this has made a noticable improvement on the radio.

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