Military HF communications under attack

"Gene Storey" wrote in message
...
"Gord Beaman" wrote

C'mon Gene, try to make some sense here will you?...why should
one tune to 60 Hz? (the power line freq btw). Pls do explain what
the hell you're talking about.

The power line frequency (after BPL) will include the frequencies
2 to 80 MHz and the harmonics. I was just using 60 Hz a poor example.

WWV time signals will be wiped-out. NDB navigation sites will be
wiped out. Etc, etc. The noise floor in the 2-60 MHz band will be
significantly higher than it is now, thus requiring higher power, or a
change in operating frequency.



Scottish Power are already running broadband over power lines,
this doesnt seem to have wiped out HF communication
and the authorities in the UK who jealously guard radio
frequencies seem not to be over worried.

Keith

"Keith Willshaw" wrote:


Scottish Power are already running broadband over power lines,
this doesnt seem to have wiped out HF communication
and the authorities in the UK who jealously guard radio
frequencies seem not to be over worried.

Keith


Hell...we already have roughly the same thing here in Canada and
the States (worldwide?).

Isn't ADSL really about the same?...(perhaps lower power
though)...they broadcast a ~one megaHertz RF carrier on
unshielded telephone cables...what's the difference really?...I
have this coming right into my 'radio room' where my (ham) HF
radio is located, I don't see any problem at all.
--

-Gord.

"Gord Beaman" ) writes:


Isn't ADSL really about the same?...(perhaps lower power
though)...they broadcast a ~one megaHertz RF carrier on
unshielded telephone cables...what's the difference really?...I
have this coming right into my 'radio room' where my (ham) HF
radio is located, I don't see any problem at all.

Telco cable is twisted pair; that's the difference....

[Twisted pair is in effect shielded cable, through the miracles
of 3-D integral calculus....]

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