The FCC has recently moved against other-than-RF sources.
http://www.commlawblog.com/2013/10/articles/enforcement-activities-fines-f/bulbs-behind-bars-ii-fcc-goes-after-hair-salon-lighting-fixture/
http://www.commlawblog.com/2014/02/articles/enforcement-activities-fines-f/bulbs-behind-bars-iii-more-lighting-fixtures-mess-up-mobile-data-service/
http://www.commlawblog.com/2011/05/articles/enforcement-activities-fines-f/fcc-settles-for-big-bucks-over-audio-gear-wait-audio/
Also interesting old news (SMPS problem):
http://www.duanemorris.com/alerts/static/A_Tele050304.pdf
Looking around I find the problem of RFI from VFD's has been known as
long as they have been around. Luckily, filters are sold specifically
for this applicaton. See for example
http://www.transcoil.com/Products/KRF.htm
Now back to LED's
Cortland
KA5S
On 2/12/2014 1:54 PM, Lee K7TJR wrote:
For me this discussion is of a minor problem. I have had a wood products
company move
within 200 yards of my antenna field. Not only have they caused a rather loud
audio noise
but they have installed a 100 Horsepower Air compressor with a VFD drive.
They also have
large sawdust moving blowers that run on VFDs and they have mentioned how
environmentally conscious they are. These items have raised my heretofore
very low noise
level by over 20 dB. I manufacture low noise receiving systems and now I no
longer have
a way to test them here. This also ruins my 160 meter DXing.
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