Reg Edwards wrote:
Radiation from the feedline is usually the least of one's problems.

99 % of RFI is due to radiation from the very nearby antenna.

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REALLY??

I thought most RFI issues, in today's world, are related to lack of
selectivity in the device experiencing the interference. RFI is
generally a susceptibility in the interefered with device. Read ALL the
information provided and you should find a manufacturer's disclaimer.

If the transmitted signal is 'clean' [meets applicable standards] then
the cause of RFI is SUSCEPTIBILITY in devices designed for MAXIMUM profit.

I'm not responsible for susceptibility issues. A neighbor complained
that my station was coming through his computer speakers. I invited him
to my station and turned on my computer and speakers. At 1 KW output
there was/is no RFI in my speakers !!! [My computer is co-located with
my station]. I suggested that he contact the manufacturer of the
speakers and obtain information to reduce susceptibility. I showed him
how I solved the susceptibility issue for my computer. The
responsibility is now his.