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Manly-Warringah Radio Society
The Manly-Warringah Radio Society (MWRS) is an Amateur Radio enthusiast group serving the Northern Beaches and North Shore areas of Sydney, Australia. Operating under the call sign VK2MB the society boasts members from a wide range of backgrounds, with members ranging from retirees to school children. History The Manly-Warringah Radio Society can trace its roots back to 1923, when it was formed as the Manly Radio Club, callsign 2YE and then VK2MR. Initially the society held meetings at the home of a club member in Fairlight until the club outgrew the premises and was forced to move to the garage of a club member in Condamine St Balgowlah. In 1935 a large house became available in Darley Rd Manly, which was used as the club house until it was partially destroyed in 1936. Following the destruction of the clubhouse in Manly the club had use of a Navy owned room near Manly Baths, and were able to string antennas between the roof of the building and nearby trees. This building was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-profit Organization
A nonprofit organization (NPO) or non-profit organisation, also known as a non-business entity, not-for-profit organization, or nonprofit institution, is a legal entity organized and operated for a collective, public or social benefit, in contrast with an entity that operates as a business aiming to generate a profit for its owners. A nonprofit is subject to the non-distribution constraint: any revenues that exceed expenses must be committed to the organization's purpose, not taken by private parties. An array of organizations are nonprofit, including some political organizations, schools, business associations, churches, social clubs, and consumer cooperatives. Nonprofit entities may seek approval from governments to be tax-exempt, and some may also qualify to receive tax-deductible contributions, but an entity may incorporate as a nonprofit entity without securing tax-exempt status. Key aspects of nonprofits are accountability, trustworthiness, honesty, and openness to eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamboree On The Air
Jamboree on the Air, known by its acronym JOTA, is an international Scouting and Guiding activity held annually; it is on the third full weekend in October. First held in conjunction with the fiftieth anniversary of Scouting in 1957, it was devised by Leslie R. Mitchell, a radio amateur with the callsign G3BHK. It is now considered the largest event scheduled by the World Organization of the Scout Movement annually.All about JOTA / JOTA / Events / Information & Events / Home - World Organization of the Scout Movement |
Organisations Based In Sydney
An organization or organisation (Commonwealth English; see spelling differences), is an entity—such as a company, an institution, or an association—comprising one or more people and having a particular purpose. The word is derived from the Greek word ''organon'', which means tool or instrument, musical instrument, and organ. Types There are a variety of legal types of organizations, including corporations, governments, non-governmental organizations, political organizations, international organizations, armed forces, charities, not-for-profit corporations, partnerships, cooperatives, and educational institutions, etc. A hybrid organization is a body that operates in both the public sector and the private sector simultaneously, fulfilling public duties and developing commercial market activities. A voluntary association is an organization consisting of volunteers. Such organizations may be able to operate without legal formalities, depending on jurisdiction, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D-STAR
D-STAR (Digital Smart Technologies for Amateur Radio) is a digital voice and data protocol specification for amateur radio. The system was developed in the late 1990s by the Japan Amateur Radio League and uses minimum-shift keying in its packet-based standard. There are other digital modes that have been adapted for use by amateurs, but D-STAR was the first that was designed specifically for amateur radio. Several advantages of using digital voice modes are that it uses less bandwidth than older analog voice modes such as amplitude modulation and frequency modulation. The quality of the data received is also better than an analog signal at the same signal strength, as long as the signal is above a minimum threshold and as long as there is no multipath propagation. D-STAR compatible radios are available for HF, VHF, UHF, and microwave amateur radio bands. In addition to the over-the-air protocol, D-STAR also provides specifications for network connectivity, enabling D-STAR radio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Project 25
Project 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and commercial applications worldwide. P25 radios are a direct replacement for analog UHF (typically FM) radios, but add the ability to transfer data as well as voice, allowing for more natural implementations of encryption and text messaging. P25 radios are commonly implemented by dispatch organizations, such as police, fire, ambulance and emergency rescue service, using vehicle-mounted radios combined with repeaters and handheld walkie-talkie use. Starting around 2012, products became available with the newer phase 2 modulation protocol, the older protocol known as P25 became P25 phase 1. P25 phase 2 products use the more advanced AMBE2+ vocoder, which allows audio to pass through a more compressed bitstream and provides two TDMA voice ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CTCSS
In telecommunications, Continuous Tone-Coded Squelch System or CTCSS is one type of in-band signaling that is used to reduce the annoyance of listening to other users on a shared two-way radio communication channel. (See squelch.) It is sometimes referred to as tone squelch. It does this by adding a low frequency audio tone to the voice. Where more than one group of users is on the same radio frequency (called ''co-channel users''), CTCSS circuitry mutes those users who are using a different CTCSS tone or no CTCSS. It is sometimes referred to as a sub-channel, but this is a misnomer because no additional channels are created. All users with different CTCSS tones on the same channel are still transmitting on the identical radio frequency, and their transmissions interfere with each other; however; the interference is masked under most conditions. The CTCSS feature also does not offer any security. A receiver with just a carrier or noise squelch does not suppress any sufficiently s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Lighthouse And Lightship Weekend
The International Lighthouse and Lightship Weekend (ILLW) is an annual event held on the third full weekend of August each year. The event was the brainchild of John Forsyth and Mike Dalrymple who were members of the Ayr Amateur Radio Group in Scotland. The event, which started in 1998, has developed into an international gathering of amateur radio operators from an estimated 95 countries. Concurrent with this event, the Association of Lighthouse Keepers conduct their Lighthouse Heritage Weekend whereby lighthouse managers and keepers all around the world are encouraged to open their doors to the public for a viewing of their lighthouse and its history. The event is currently managed by an Australia amateur radio operator, Kevin Mulcahy (call VK2CE), who has been involved since 1998, and who now owns the domain name and web site. A small team of volunteers assist in the running of the weekend activity. Major amateur radio organizations such as the Radio Society of Great Britain, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio Operator
An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service. Amateur radio operators have been granted an amateur radio license by a governmental regulatory authority after passing an examination on applicable regulations, electronics, radio theory, and radio operation. As a component of their license, amateur radio operators are assigned a call sign that they use to identify themselves during communication. About three million amateur radio operators are currently active worldwide. Amateur radio operators are also known as radio amateurs or hams. The term "ham" as a nickname for amateur radio operators originated in a pejorative usage (like "ham actor") by operators in commercial and professional radio communities, and dates to wired telegraphy. The word was subsequently adopted by amateur radio operators. Demographics {, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters). Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere – a method known as "skip" or " skywave" propagation – these frequencies are suitable for long-distance communication across intercontinental distances and for mountainous terrains which prevent line-of-sight communications. The band is used by international shortwave broadcasting stations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NATO Phonetic Alphabet
The (International) Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear code words for communicating the letters of the Roman alphabet, technically a ''radiotelephonic spelling alphabet.'' It goes by various names, including NATO spelling alphabet, ICAO phonetic alphabet and ICAO spelling alphabet. The ITU phonetic alphabet and figure code is a rarely used variant that differs in the code words for digits. To create the code, a series of international agencies assigned 26 code words acrophonically to the letters of the Roman alphabet, with the intention of the letters and numbers being easily distinguishable from one another over radio and telephone, regardless of language barriers and connection quality. The specific code words varied, as some seemingly distinct words were found to be ineffective in real-life conditions. In 1956, NATO modified the then-current set of code words used by the International ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dick Smith (entrepreneur)
Richard Harold Smith (born 18 March 1944) is an Australian entrepreneur, aviator and philanthropist. He holds a number of aviation world records and is the founder of Dick Smith Electronics, ''Australian Geographic'' and Dick Smith Foods. He was selected as 1986 Australian of the Year. In 2010, he founded the media production company Smith&Nasht with the intention of producing films about global issues. In 2015, he was awarded the Companion of the Order of Australia. He is a fellow of the Committee for Skeptical Inquiry. Early life Smith's father was a salesman and sometime manager at Angus & Robertson's bookstore. He started a business that failed when Smith was 17, and his mother a housewife. His maternal grandfather was pictorialist photographer Harold Cazneaux. As a child, Smith was considered academically hopeless and, having a speech defect, called himself "Dick Miff". From his home in East Roseville, Smith attended primary school at Roseville Public School at which, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrey Hills, New South Wales
Terrey Hills is a suburb of Northern Sydney, in the state of New South Wales, Australia 25 kilometres north of the Sydney central business district in the Local government in Australia, local government area of Northern Beaches Council. It is part of the Forest District (Sydney), Forest District and Northern Beaches region. Terrey Hills is a very leafy suburb and in some areas semi-rural, with many people boarding their horses in the area. Terrey Hills owes its name to the two original land holders Samuel Hills and Obediah James Terrey. Obediah Terrey acquired in 1881 and Samuel Hills owned nearby. The area was used by Indigenous people prior to European settlement, and Sydney rock engravings, rock carvings exist in some places. One set of carvings is located near Larool Road and depicts hunting scenes with Kangaroo, kangaroos, human figures and Footprint, footprints. Terrey Hills Post Office opened on 17 June 1935. History For the older (geological) history, Terrey Hills is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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