[Lowfer] Last Chance on 136 kHz Rulemaking

[craig wasson]

Warren - you are thinking with common sense.   Remember - this is the
government and power company lawyers involved here...

I expected to get flamed for my reply comments.  I took a very
conciliatory approach trying to address every concern raised by the
power companies so the FCC would have a hard time saying no.  I didn't
specify how much power would need to be reduced, and since the odds
are about 1 in 50 that a given power line has a PLC carrier in or
adjacent to the band, most likely you would not have any restriction.
I don't know what EIRP it would take to couple 5 millivolts into the
transmission line as received at the nearest substation, but I'd think
it would take more than 1 watt.

We all know that interference is difficult to impossible to happen by
accident.  If you were near a PLC with a carrier right in the band you
would see it on your receiver and know to avoid it.  The 4 kHz guard
band they talk about has more to do with crosstalk at substations
where there may be many lines going in and out and you would want the
frequencies you transmit on to be separated from ones you receive on.