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HF interference from BPL or PLC

South Africa's only electric utility has been transmitting telephone and
very low level data signals over its powerline grid since the 1970's without
causing any interference.

Our telecomms laws will soon change and there is some talk that the electric
utility may enter the ISP market with a BPL/PLC system.  (The UK is also
worried about high-speed PLC systems being implemented there too.)

A limited number of commercial broadcast stations still transmit on MW and
HF within our country.

If a PLC system causes any interference, will it be strong enough to upset a
broadcast listener close to the powerline, or will the Hams be the only
sufferers again?

Deon ZR1DQ
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