Differences

This shows you the differences between two versions of the page.

--- amateur-alphabet [2023/06/18 16:19] – [D] m0tzo
+++ amateur-alphabet [2023/06/18 16:27] (current) – [H] m0tzo
@@ Line 54: / Line 54: @@
 ====== F ======
-  - The F layer is the most important layer of the ionosphere for radio communications and stretches from 150 to 500 km above the earth. In reality, there can be a splitting of this layer into F1 and F2 but the latter is responsible for most long-distance communication between 10 and 30 MHz (occasionally also up to 50 MHz). It is especially prominent during periods of high sun activity (see also the ‘sunspot cycle’).
+  - The **F layer** is the most important layer of the ionosphere for radio communications and stretches from 150 to 500 km above the earth. In reality, there can be a splitting of this layer into F1 and F2 but the latter is responsible for most long-distance communication between 10 and 30 MHz (occasionally also up to 50 MHz). It is especially prominent during periods of high sun activity (see also the ‘sunspot cycle’).
-  - The amateur radio band 21.000 to 21.450 MHz is usually referred to as ‘fifteen’ (as this is roughly the wavelength of the signals at this frequency in meters).
+  - The amateur radio band 21.000 to 21.450 MHz is usually referred to as ‘**fifteen**’ (as this is roughly the wavelength of the signals at this frequency in meters).
-  - The amateur radio band 7.000 to 7.200 MHz (in Region   - is usually referred to as ‘forty’ (as this is roughly the wavelength in meters of the signals at this frequency).
+  - The amateur radio band 7.000 to 7.200 MHz (in Region   - is usually referred to as ‘**forty**’ (as this is roughly the wavelength in meters of the signals at this frequency).
-  - ‘Full legal limit’ is how many US amateurs refer to the maximum permitted power output of their stations (1.5 kW).
+  - ‘**Full legal limit**’ is how many US amateurs refer to the maximum permitted power output of their stations (1.5 kW).
-  - Footprint refers to the area underneath a satellite where it can be heard or reached by transmitter. Obviously, the higher the satellite’s orbit, the larger the footprint will be.
+  - **Footprint** refers to the area underneath a satellite where it can be heard or reached by transmitter. Obviously, the higher the satellite’s orbit, the larger the footprint will be.
-  - FAI = Field Aligned Irregularity. More commonly referred to as ‘backscatter’, this is a mode of propagation whereby signals ‘bounce’ off a layer which is not in the actual direction of the station’s location you are receiving. A station to the north of you, for example, may be much louder (or even hearable at all) when you point your beam to the East, and completely in the noise when you point North.
+  - **FAI** = **Field Aligned Irregularity**. More commonly referred to as ‘backscatter’, this is a mode of propagation whereby signals ‘bounce’ off a layer which is not in the actual direction of the station’s location you are receiving. A station to the north of you, for example, may be much louder (or even hearable at all) when you point your beam to the East, and completely in the noise when you point North.
 ====== G ======
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 ====== H ======
-  - The abbreviation HF stands for High Frequency and refers to the radio spectrum between 3 and 30 MHz. In amateur radio practice it is used to refer to the bands between 14 MHz and 28 MHz (20 to 10 metre bands), the other bands either being the ‘Low Bands’ (see there), VHF or UHF (see there).
+  - The abbreviation **HF** stands for **High Frequency** and refers to the radio spectrum between 3 and 30 MHz. In amateur radio practice it is used to refer to the bands between 14 MHz and 28 MHz (20 to 10 metre bands), the other bands either being the ‘Low Bands’ (see there), VHF or UHF (see there).
-  - HRD refers to the amateur radio software Ham Radio Deluxe, a software suite that covers many areas of computer radio control, computer logging, digital communications, maps etc.
+  - **HRD** refers to the amateur radio software **Ham Radio Deluxe**, a software suite that covers many areas of computer radio control, computer logging, digital communications, maps etc.
-  - In Morse, the abbreviation HI (di di di dit  di dit – or, more usually, di di di dit  dit dit), means ‘I’m laughing (the same as lol in texting). Some amateurs use it when they are actually talking on the radio (or using ‘phone’ as we say), which is meaningless but WTF, it’s up to them.
+  - In Morse, the abbreviation **HI** (di di di dit  di dit – or, more usually, di di di dit  dit dit), means ‘I’m laughing (the same as lol in texting). Some amateurs use it when they are actually talking on the radio (or using ‘phone’ as we say), which is meaningless but WTF, it’s up to them.
-  - Once a year in Friedrichshafen in the south of Germany on Lake Constance (Bodensee in German) the biggest amateur radio exhibition in Europe is held on the three days of the last full weekend in June: the ‘Ham Radio’. Visitor numbers in 2014 were 17,100 with over 200 exhibitors.
+  - Once a year in Friedrichshafen in the south of Germany on Lake Constance (Bodensee in German) the biggest amateur radio exhibition in Europe is held on the three days of the last full weekend in June: the ‘**Ham Radio**’. Visitor numbers in 2014 were 17,100 with over 200 exhibitors.
-  - In spite of the popularity of the ‘Ham Radio’ exhibition, many people find the expressions ‘radio ham’ and ‘ham radio’ to be a bit insulting, and prefer to be called ‘radio amateurs’ and talk about ‘amateur radio’. Nevertheless, we do talk with pride about Ham Spirit, the legendary willingness of radio amateurs to help fellow hobbyists with time, advice, loans of equipment, or other kind of support. The origin of the word ham to refer to radio amateurs is unclear, although many theories have been proposed over the years.
+  - In spite of the popularity of the ‘**Ham Radio**’ exhibition, many people find the expressions ‘**radio ham**’ and ‘**ham radio**’ to be a bit insulting, and prefer to be called ‘radio amateurs’ and talk about ‘amateur radio’. Nevertheless, we do talk with pride about Ham Spirit, the legendary willingness of radio amateurs to help fellow hobbyists with time, advice, loans of equipment, or other kind of support. The origin of the word ham to refer to radio amateurs is unclear, although many theories have been proposed over the years.
-  - An HB9CV antenna is a two-element antenna usually for VHF frequencies, named after Rudolf Baumgartner, callsign HB9CV, who came up with the design in the 1950s.
+  - An **HB9CV** antenna is a two-element antenna usually for VHF frequencies, named after Rudolf Baumgartner, callsign HB9CV, who came up with the design in the 1950s.
 ====== I ======