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2. 6-meter band - Wikipedia

   en.wikipedia.org/wiki/6-meter_band

   A Yaesu FT-857D tuned to 50.125 MHz, the traditional 6-meter single-sideband calling frequency in the United States. [1]The 6-meter band is the lowest portion of the very high frequency (VHF) radio spectrum (50.000-54.000 MHz) internationally allocated to amateur radio use.

3. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   1.6 × 10 −5 quectometers (1.6 × 10 −35 meters) – the Planck length (Measures of distance shorter than this do not make physical sense, according to current theories of physics.) 1 qm – 1 quectometer, the smallest named subdivision of the meter in the SI base unit of length, one nonillionth of a meter.

4. Radio spectrum - Wikipedia

   en.wikipedia.org/wiki/Radio_spectrum

   A radio band is a small frequency band (a contiguous section of the range of the radio spectrum) in which channels are usually used or set aside for the same purpose. To prevent interference and allow for efficient use of the radio spectrum, similar services are allocated in bands.

5. Very high frequency - Wikipedia

   en.wikipedia.org/wiki/Very_high_frequency

   The FM broadcast band originally operated here (42–50 MHz) before it was moved to 88–108 MHz. 50–54 MHz: Amateur radio 6-meter band. 50.8–51 MHz: Radio-controlled aircraft (on ten fixed frequencies at 20 kHz spacing) with an FCC amateur radio Service license, flown under FCC Part 97, rule 97.215. [11]

6. Smith chart - Wikipedia

   en.wikipedia.org/wiki/Smith_chart

   The Smith chart (sometimes also called Smith diagram, Mizuhashi chart (水橋チャート), Mizuhashi–Smith chart (水橋スミスチャート), [1] [2] [3] Volpert–Smith chart (Диаграмма Вольперта—Смита) [4] [5] or Mizuhashi–Volpert–Smith chart) is a graphical calculator or nomogram designed for electrical and electronics engineers specializing in radio ...

7. Amateur radio frequency allocations - Wikipedia

   en.wikipedia.org/wiki/Amateur_radio_frequency...

   The nominal "17 m" band actually covers 16.6–16.5 m. The nominal "15 m" band actually ranges from 14.28–13.98 m. By common sense, the "15 m" band ought to be called "14 m", but that name has been in longtime use for a shortwave broadcast band. 80 metres or 80 / 75 meters – 3 500–4 000 kHz – 85.65–74.95 m actual

8. Shortwave bands - Wikipedia

   en.wikipedia.org/wiki/Shortwave_bands

   Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band). Radio waves in these frequency ranges can be used for very long distance (transcontinental) communication because they can reflect off layers of charged particles in the ionosphere and return to Earth beyond the horizon, a ...

9. 6 meter - Wikipedia

   en.wikipedia.org/wiki/6_meter

   Printable version; In other projects ... 6 meter may refer to: 6-meter band, an amateur radio band; 6 Metre, a type of sailboat This page was last edited on 3 ...