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Amateur Radio
Amateur radio (also called ham radio) is the private and licensed use of selected radio bands for recreational purposes, experimentation, and emergency communication. Amateur radio operates under rules limiting the maximum power and technical characteristics of each transmission.
356 Questions
Are you related to anyone famous?
The only way to know if you are related to someone famous is:
- be told that by a parent or other relative, and have reason to believe they are correct, or
- see it in an existing Family Tree, and have reason to think it is correct, or
- research your own family history with care and, using valid records, show that you are related to someone famous.
Role of radio in disaster management?
Many disasters involve the crippling or destruction of normal communications methods:
- Telephone (especially cellphone) networks may be overloaded.
- Electrical power may be unavailable (especially at a disaster site).
Radios and radio systems that are portable and battery (or generator) powered can avoid the above problems.
How do i take the radio out of my 2002 Acura RSX?
Disconnect the battery. Take out the centre console and the cover from the gear lever. Remove the ashtray and cup holders. 2 screws hold in the stereo from underneath. they are inserted vertically. Once these are removed the unit slides out.
How is ham radio useful during disaster?
The government itself does not use amateur (ham) radio. There are thousands of licensed ham radio operators who volunteer to help when the government asks for help. These hams have expensive portable radios, antennas, antenna tuners, batteries, and so forth, that they purchase with their own money
What is the purpose of an audio mixer?
What a mixing console or "desk" does is allow several audio sources to be "mixed" into one. It's called a "summing" circuit. Let's say you were trying to record your friend playing a guitar and singing. You've got a cable coming out of her microphone and another coming out of her guitar. If you were to just cut the ends off the two cables, twist them together, solder a plug on the end and hook them to your tape deck, the sound would be all distorted and nasty. But if you use a mixing console aka mixer it will sound better.
The device described above is a mixing "console" which is a mixer with other things in it, like reverb, limiters, equalizers, delay lines...a mixer is part of a console. The person called a sound mixer runs the mixing console.
In a live concert setting, the person known as the sound mixer, also called the Front Of House Sound Engineer, is the person who combines all of the microphones on stage into a balanced mix for the listening audience.
In a recording studio, the sound mixer is responsible for recording the music onto digital or analog media and then remixing the music into a final mix for release to the listening public.
In film and television production, the sound mixer, also called a sound recordist, is the person on set who records the dialog and sound effects that will be used in the movie or television show.
How did the radio look like when it was first time invented?
The first radio used visible coiled wiring and a large circular wire antenna. It did not have a case or speakers built into it and did not look like what a person of today might expect a radio to look like. The first designs of a functional radio were created in 1888 by Heinrich Rudolf Hertz after spending two years studying James Clerk Maxell's theory on electromagnetism, a theory that proposed the existence of electromagnetic waves. Hertz's design was the first properly functional radio transceiver which could send and receive signals, although these signals weren't informative. It would still be decades until we developed this technology to resemble the humble radio we know and love today.
How many station of ham radio?
A long time ago, I saw the figure of 460,000 licensed amateur operators worldwide. But trust me, that was really a long time ago. Check out the website of the American Radio Relay League for more up-to-date information.
Radio portion of the electromagnetic spectrum Radio waves are divided up into bands by frequency (and corresponding wavelength) as shown in the radio frequency spectrum table below. {| ! ! ! ! ! | < 3 Hz
> 100,000 km Extremely low frequency ELF 1 3-30 Hz
100,000 km - 10,000 km Communication with submarines Super low frequency SLF 2 30-300 Hz
10,000 km - 1000 km Communication with submarines Ultra low frequency ULF 3 300-3000 Hz
1000 km - 100 km Communication within mines Very low frequency VLF 4 3-30 kHz
100 km - 10 km Submarine communication, avalanche beacons, wireless heart rate monitors, geophysics Low frequency LF 5 30-300 kHz
10 km - 1 km Navigation, time signals, AM longwave broadcasting Medium frequency MF 6 300-3000 kHz
1 km - 100 m AM (Medium-wave) broadcasts High frequency HF 7 3-30 MHz
100 m - 10 m Shortwave broadcasts, amateur radio and over-the-horizon aviation communications Very high frequency VHF 8 30-300 MHz
10 m - 1 m FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications Ultra high frequency UHF 9 300-3000 MHz
1 m - 100 mm television broadcasts, microwave ovens, mobile phones, wireless LAN, Bluetooth, GPS and Two-Way Radios such as FRS and GMRS Radios Super high frequency SHF 10 3-30 GHz
100 mm - 10 mm microwave devices, wireless LAN, most modern Radars Extremely high frequency EHF 11 30-300 GHz
10 mm - 1 mm Radio astronomy, high-speed microwave radio relay Above 300 GHz
< 1 mm |}
What year did amateur radio start?
The government did not take up seriously the licensing and control of amateur and commercial radio operators- all this was in Code then, until about l00 years ago. There was something called the Roberts Bill. Popular electronics writer- and also a Science fiction man- Hugo Gernsback manufactured amateur radio gear and took up the cause of the Amateur- in a very real sense he can be called one of the founding fathers. Naturally, he used his magazines ( Modern Electrics, was one) as a , well repeater circuit. this was around l9ll or so. It fell under the department of commerce- the maritime section- as there were and are many Marine operators- catapulted into the news by the Titanic disaster a year or so later! It should be noted- emergency prepardedness aside- Ham operators were NOT directly involved in the Titanic disaster or rescue attempts and message traffic connected with it. SOS indeed!
Why does the FCC have an amateur radio service?
Answer #1: When radio hobbyist first began to design radio communication equipment and modes, most people did not understand and thought that the hobbyist were just showing off some misunderstood skills, and were just 'hamming it up'. In fact many innovations in telecommunications were invented by radio amateurs.
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Answer #2: During 58 years as a licensed amateur radio operator, all of the articles I've ever read on the subject agree on one thing ... that nobody really knows that answer..
What license is required Marine VHF radio?
A radio operator's certificate through an application to the Federal Communication Commission.
How to make a homemade FM radio antenna?
The cost of repairing drywall damage would depend on how much damage is done. If you were to buy the drywall it ranges from $10 to $30 a sheet. Plus if you hired someone then it would cost more for labor then it would if you did it yourself.
What is the function of a ham radio?
Ham Radio also known as Amateur Radio, is a service and hobby enjoyed by radio enthusiasts around the world. Hams use radio equipment to communicate all over the world. A license is required to operate a ham radio. More information is available from the American Radio Relay League or you can search for a ham radio club in your area.
Its size varies depending on whose Bible and when in history. Go to http://www.answers.com/topic/canaan
for a terrific article and maps to help you out.
Solder is a metal ,specially alloyed to be used to fix or weld together other pieces of metal.
How to use it would depend on the application and the exact metals being used
How fast is the traxxas slash with a novak HV 6.5 turn 16.8 volts with 27 pinion 76 spur?
faster than a little slash should be somewhere round +-65
Which way does a record player spin?
The player remains in a fixed orientation with respect to the shelf it's sitting on,
in order to avoid tangling the wires and cables to which it's connected.
When the player is in use, however, the record spins clockwise as viewed from above.
At this point we're talking about amplitude modulation. If you're transmitting with "29.000" MHz displaying on your radio's frequency display and your bandwidth is set to 4 kHz, you are transmitting useful intelligence from 28.996MHz to 29.004MHz--4KHz on each side of the carrier--in "full carrier" or "double sideband" mode. You wouldn't actually transmit this for a couple of reasons. The most important reason is that using filters in your radio to remove either the signal below 29MHz (called "upper sideband" or USB operation) or the signal above it (called "lower sideband" or LSB) allows another operator to use the piece of spectrum you relinquished. The other advantage is SSB makes more efficient use of your amplifier, so you can talk to people farther away from you and they can hear you better. So..."full carrier" means double sideband, and then there's single sideband.
What are the qualifications to become a HAM radio operator?
To become a licensed Amateur Radio Operator, you must pass the FCC examination
(About 35 questions) - More information can be found at ARRL.ORG or QRZ.COM
How is a two tone test performed?
A pair of audio tones is applied to the audio input of a transmitter, often one designed
to transmit single sideband suppressed carrier, at a level intended to produce at or near
100% modulation. The transmitter output can then be examined to evaluate the peak
effective power, steady state power, RF bandwidth, harmonic distortion, and intermodulation
products at the tone frequencies and at their harmonics.
What does what's your 20 mean?
i.e., what's your location. It's CB radio talk. (CB borrowed a few items from the
old Police/Fire/Emergency "10-Code" list. "10-20" meant "What is your location?"
