rf_engineer
join:2003-08-04
USA
| HF Frequencies
Here's a web page I stumbled upon that lists 1000 HF frequencies of interest »www.monitoringtimes.com/html/mttopHF.html . It's not a complete list of allocations by any means, but it gives a good sample of non-Amateur use of the band. This is why notching is an impossible endeavor and a "national off switch" for use in times of disaster, as some have suggested, isn't realistic. |
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AD7BK
Premium
join:2000-03-23
Port Orchard, WA
 ·wavebroadband
| said by rf_engineer  :
Here's a web page I stumbled upon that lists 1000 HF frequencies of interest »www.monitoringtimes.com/html/mttopHF.html . It's not a complete list of allocations by any means, but it gives a good sample of non-Amateur use of the band. This is why notching is an impossible endeavor and a "national off switch" for use in times of disaster, as some have suggested, isn't realistic.
And if the NOTCH the bands out it will not only cause problems elsewhere it will degrade the service. So no matter what they do the on the low bands it will not work
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The following statement is true...The Proceeding statement was false!!--George Carlin |
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N0JCG
join:2003-07-18
Minneapolis, MN
| reply to rf_engineer
One problem is that it looks like the FCC is putting the burden of detecting and identifying the offending BPL element on the licensed users. This raises all sorts of questions, beyond the obvious of why the burden is on the victim;
1. As a licensed user, will they accept my judgement of harmfull interference?
2. How will they verify it? Hold the phone up to the speaker? Roll a truck?
3. Does this mean an engineer/technician at the BPL head end tweaks things until I'm satisfied?
4. What assures that their database is accurate? What are the penalties for not maintaining it?
5. Is there a max response time?
6. Can I drive around and file a complaint at each device? Why not?
7. If their database is real time, can I drive around with a few hundred watts and watch the BPL repeaters wink off in real time? |
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rf_engineer
join:2003-08-04
USA | reply to rf_engineer
Here's another good website that is yachting oriented, but a cornucopia of HF frequencies.
»www.yachtcom.co.uk/comms/Frequencies.htm |
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