From early in the 20th century, the radio frequency of 500 kilohertz (500 kHz) was an international calling and distress frequency for Morse code maritime...

2182 kHz is a radio frequency designed exclusively for distress calls and related calling operations in the maritime service. It is equivalent to a wavelength...

500 may refer to: 500 (number) 500 BC AD 500 500 Boylston Street in Boston 500 Brickell in Miami 500 Capitol Mall in Sacramento 500 Fifth Avenue 500 Renaissance...

which block the high-frequency carrier waves (24–500 kHz) and let power frequency current (50–60 Hz) pass through. Wave traps are used in the switchyards...

computer, where it was first called the TMS9919 and later SN94624, and had a 500 kHz max clock input rate. Later, when it was sold outside of TI, it was renamed...

easily drift off frequency by 3–4 kHz. Since broadcast stations were assigned frequencies only 10 kHz (Americas) or 9 kHz (elsewhere) apart, interference...

frequency (MF) region, within the 415–526.5 kHz maritime band. With maritime traffic largely displaced from 500 kHz band, some countries had taken steps prior...

communication by international agreement. For much of the 20th century, 500 kHz was the primary international distress frequency. Its use has been phased...

S.), maritime radio stations were required to observe radio silence on 500 kHz (radiotelegraph) for the three minutes between 15 and 18 minutes past the...

listen for priority signals, for 3 minutes, at different times for 500 kHz and 2182 kHz. Since many merchant vessels carried only one or two radio operators...

amplifier for these signals. At the time, short wave was anything above about 500 kHz, beyond any existing amplifier's capabilities. It had been noticed that...

kilovolts (kV) are used worldwide, especially for high-speed rail. It is usually supplied at the standard utility frequency (typically 50 or 60 Hz), which...

Collins released the 51J-1 receiver, a general-coverage HF set covering 500 kHz to 30 MHz. It was produced in somewhat updated versions (51J-2, 51J-3,...

marine VHF band. 500 kHz was for many years the maritime distress and emergency frequency, and there are more NDBs between 510 and 530 kHz. Navtex, which...

similarly offered a 512-stage delay line but with a clock rate range of 5–500 kHz. Other common BBD chips include the Panasonic MN3005, MN3007, MN3204 and...

The sound frequencies used in side-scan sonar usually range from 100 to 500 kHz; higher frequencies yield better resolution but less range. The earliest...

generated from medium frequency alternating current (in the range of 350–500 kHz). RFA is generally conducted in the outpatient setting, using either a...

video in analog RGB 50 Hz PAL or 60 Hz NTSC through a proprietary DB23M connector and in NTSC mode the line frequency is 15.75 kHz HSync for standard video...

instrument's pitch circuitry includes two radio frequency oscillators set below 500 kHz to minimize radio interference. One oscillator operates at a fixed frequency...

payload of Es'hail 2 includes a linear transponder with a bandwidth of 500 kHz and 8 MHz for the amateur radio satellite service, with uplink on 2.4 GHz...

data ( ≤ 200 Hz bandwidth).   CW, RTTY and data ( ≤ 500 Hz bandwidth).   CW, RTTY, data, NO SSB ( ≤ 2.7 kHz).   CW, phone and image ( ≤ 3 kHz bandwidth)...

FT-7B has fully extended 10 m band coverage in four 500 kHz segments (this was limited to a single 500 kHz segment in the original FT-7 version). The FT-7B...

over some of the safety applications previously served by 500 kHz and other frequencies. 2182 kHz is a medium-wave frequency still used for marine emergency...

such as the Marconi Type 241, c. 1920. These operated using Morse code on 500 kHz, the international distress frequency at the time. This frequency had the...

455 kHz (most common), 460 kHz, 465 kHz, 467 kHz, 470 kHz, 475 kHz, and 480 kHz. FM radio receivers: 262 kHz (old car radios), 455 kHz, 1.6 MHz, 5.5 MHz, 10...

advice QOA Can you communicate by radiotelegraphy (500 kHz)? I can communicate by radiotelegraphy (500 kHz). QOB Can you communicate by radiotelephony (2...

The 2200-meter or 136 kHz band is the lowest frequency band in which amateur radio operators are licensed to transmit. It was formally allocated to amateurs...

through the British Library Archives catalogue. LEO I's clock speed was 500 kHz, with most instructions taking about 1.5 ms to execute. To be useful for...

by radiotelegraphy (500 kHz)? I can communicate by radiotelegraphy (500 kHz). QOB Can you communicate by radiotelephony (2182 kHz)? I can communicate...

band; measurements in the 5725–5875 MHz band are made over a bandwidth of 500 kHz; measurements in the 5150–5250 MHz, 5250–5350 MHz, and 5470–5725 MHz bands...