[RFI] Hyperikon LED Tube Info

Jim Brown jim at audiosystemsgroup.com
Tue Nov 10 13:02:32 EST 2020

Thanks for your work and your post, Jeff.

There's one VERY important problem with your method in attacking devices 
like this. Your method is great for power line noise, which is impulse 
noise, and thus present at all frequencies. The noise electronic devices 
produce is NOT impulse noise, and is rarely present at all frequencies. 
Rather, it shows up at harmonics of the square waves that the noise 
source uses. For electronic sources, we must use a receiver that can 
listen on the ham bands where noise is a problem.

73, Jim K9YC

On 11/10/2020 6:32 AM, Jeff (W4DD) wrote:
> HT set to 137MHz / 3 element 137MHz Yagi / 45dB attenuator (this is my
> standard power line noise hunting arrangement) positioned at 5Ft from the
> fixture.

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