That's very interesting.
I have heard that long led strips eg in the kitchen are powered from a noisy
smpsu: the long cable is the antenna. A linear supply should stop that
noise or small ferrite toroids (it's very low current). I have just
purchased some from IKEA and will be testing them soon.
not only the "defective" LED lamps makes the noise.
I found several LED strips (used commonly in kitchen)
and LED bulbs coming from China generates strange noise
on HF bands. I noticed it when the noise raised up from S3 to S7
on 160m while I was on key. So I immediately went to investigate
what was changed at our home and I discovered that XYL switched
ON the LED strip installed in kitchen cabinets.
The same noise source was the LED bulb in the small bed lamp in the
bedroom. After I replaced all of these Chinese crappies with standard
the noise gone. (LED strip in kitchen cabinets must be OFF when I am on
Hope it helps,
73 - Petr, OK1RP
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