[RFI] Mystery buzz 1.7 to 2.0 MHz

[George K. Watson]

Any experiences with this type of noise?  Your thoughts, ideas, etc. please.

The new 12 volt 'artsy' lighting systems can do exactly this. These systems utilize
high current switchers to convert line to 12V (very high current). The lighting is strung
using open copper wire (great antennas) throughout the room or house. It is the current
cutting edge in home lighting and very noisy at RF as the switchers sacrifice a lot for
switching efficiency and high current capability. We have one in my 'hood which has
taken N0CD off of 160m and which I can hear even though I am several miles away
from the source. The household involved has been somewhat cooperative, and the
manufacturer has shipped new supplies, but it is not any better. One of the big
problems with these systems is that they generate such high DC currents that gettting
any significant inductance on the wires is going to take a very large amount of ferrite material.

George K. Watson
K0IW

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