[Lf] LF interference with power line carrier systems

[Frank Gentges K0BRA]

Hi,

The biggest hurdle to amateur LF allocations looks to be the potential
interference with the power industry's  unlicensed LF power line carrier
systems.  It is strange that we find ourselves arguing the case for licensed
stations causing interference with unlicensed "squatter" systems.  It looks
like Clearwire Technologies tried to argue a similar line of logic and found
themselves in a difficult position that they felt could not defend.  They
withdrew their petition to the FCC.  Did a little birdie tell Clearwire they
were going to lose?

Maybe the power industry will take a hint and feel similarly about their
position on LF.

This news item came from the ARRL letter.

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++++

CLEARWIRE WITHDRAWS SPREAD SPECTRUM PETITION

Clearwire Technologies has withdrawn its Petition for Reconsideration asking
the FCC to reconsider the revised spread spectrum rules it issued last
summer. The new rules became effective November 1. But the company said it
"expressly reserves" its position that Part 15 users such as Clearwire are
"entitled to seek protection from an Amateur station that operates
unlawfully."

Clearwire manufactures high-speed wireless Internet and network access
devices operating at 2.4 GHz, where there's an amateur allocation. Fearing
possible amateur interference with its Part 15 products, however, Clearwire
had wanted the FCC to reconsider portions of its Report and Order.

Calling Clearwire's Petition "frivolous," the ARRL in January called on the
FCC to dismiss it and to reaffirm its original Report and Order. The League
said none of Clearwire's requests was reasonable and suggested the company
had no standing to propose "new, burdensome restrictions" on amateur
operation. The ARRL noted that FCC rules do not afford Part 15 devices any
protections from interference from licensed services, such as Amateur Radio.

Disagreeing with the ARRL's stance, Clearwire pointed out in its withdrawal
letter that while Part 15 devices must accept interference from "authorized"
radio stations, "Clearwire does not waive its right to seek relief from
unlawful Amateur operation in the future."

Frank Gentges
K0BRA ex AK4R, W3FGL
See www.amrad.org/projects/lf for the latest on LF