Topband: New Noise - 160 Meters

[David Cutter]

Petr

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.

David
G3UNA



> Hello,
>
> 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
> lamps
> the noise gone. (LED strip in kitchen cabinets must be OFF when I am on
> key, hi)
>
> Hope it helps,
>
> 73 - Petr, OK1RP