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":
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.
In another life, I've also encountered your Power Supply / RFI issue.
ReplyDeleteI got a combined panel mounting IEC Mains Connector and Filter from RS Components
[ Farnell/Element 14 equivalent order code: 2336599 ],
and encased the whole PSU in an oversized diecast box, with expanded metal grilles to let cooling air through but retain adequate screening.
I threaded the dc output cable through two 25mm dia ferrite rings [in series] inside the box and that did the trick for me.
Good luck
Tony.
Thanks Tony, that's very helpful. I do have one of those filtered mains connectors.
ReplyDelete