Survivalism & Self Sufficiency Topics > The HAM Radio Board

2200 meters and 630 meters now open to amateurs in the USA

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Smurf Hunter:
http://cqnewsroom.blogspot.com/2017/03/flash-fcc-approves-new-mflf-ham-bands.html

I don't know much about LF/MF.  On the surface these are limited to what we'd consider QRP on HF.
The bandwidth would be very narrow, so I'm unsure what modes would fit there.
Also the idea of an antenna sized to 1/2 wavelength seems close to impossible for a hobbyist to achieve.

armymars:
  Part 15 use to allow 10 watts on 1650 meters. Most people on that frequency used a short verticals with large top hats. If you check out the 1929 ARRL hand book you'll see they use folded dipoles with 3 or more wires.   

Alan Georges:
I'm guessing that these bands will be best for blanketing a small area with signal, and will essentially ignore interference from hills.  MW can do amazing stuff at night in winter, but it's hard to see how these permitted low power levels will be able to overcome distant lighting noise in the summer.

The one thing that looks really interesting is ground wave propagation over salt water.  WWL in New Orleans blankets the northern Gulf coast this way, even in the daytime.  (Here's a coverage map: http://radio-locator.com/cgi-bin/patg?id=WWL-AM)  It's "way up" at 345 meters (i.e., 0.870 MHz).  Admittedly WWL broadcasts at 50kw, but it it uses relatively inefficient amplitude modulation.  How will a narrowband data signal perform over salt water, down in these new bands?

Interesting ham geek stuff, but I'm not sure how relevant it will ultimately be to what we discuss here at TSP.  But who knows, maybe this'll spur a renaissance in loop antenna design or something, and we'll all end up with something practical.

Carl:
  I will wait till Baofeng produces the handy sized version with pocket antenna.

Alan Georges:

--- Quote from: Carl on April 01, 2017, 05:35:50 AM ---  I will wait till Baofeng produces the handy sized version with pocket antenna.

--- End quote ---
They're waiting on Radio Shack to introduce one, so that they can cheaply clone the design.

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