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Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications. [1]
Today, amateur radio operators still use codes 73 and 88 regularly, and -30-is used in journalism, as it was shorthand for "No more - the end". The Young Ladies Radio League uses code 33 to mean "love sealed with friendship and mutual respect between one YL [young lady] and another YL" [3] or simply "hugs." A once-used but unofficial code 99 ...
The AN/ART-13 is used today by ham radio operators interested in restoring and operating historic military gear. [2] It is often paired with a BC-348 military receiver of World War II vintage or the later AN/ARR-15 autotuned receiver of postwar vintage.
Amateurs use a variety of voice, text, image, and data communications modes over radio. Generally new modes can be tested in the amateur radio service, although national regulations may require disclosure of a new mode to permit radio licensing authorities to monitor the transmissions.
Radio ZS South Africa: English Monthly Unknown old man Switzerland: German, Italian, French Monthly 1932–2007 HBradio Switzerland: German, Italian, French Monthly 2008–present Practical Wireless United Kingdom: English Monthly 1932–present RadCom United Kingdom: English Monthly 1913–present CQ Amateur Radio United States: English Monthly
He is considered the Patron saint of Amateur radio operators. [17] Two radios in the ARC-5 series. Unit on the left is a BC-453-B, covering 190-550 kHz; the one on the right is a BC-454-E, covering 3-6 MHz. Both have been modified for Amateur Radio use by replacing the front connector with a small control panel.
MARS interfaces with Amateur Radio and provides DoD with local, domestic information when normal methods of communications are impaired or disrupted. The traditional land or sea-based MARS Radio Phone Patch is largely a thing of the past because land and sea-based MARS stations have been dismantled in favor of Satellite Phones.
The first BFOs, used in early tuned radio frequency (TRF) receivers in the 1910s-1920s, beat with the carrier frequency of the station. Each time the radio was tuned to a different station frequency, the BFO frequency had to be changed also, so the BFO oscillator had to be tunable across the entire frequency band covered by the receiver.