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.

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 |}

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!

A radio operator's certificate through an application to the Federal Communication Commission.

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.

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

faster than a little slash should be somewhere round +-65

1 league = 3.4523384 miles

no

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.

100-700 usd

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.

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

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.

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?"

One megahertz

Every ham radio station comprises, at an absolute minimum:

-- One (1) radio transmitter.

-- One (1) radio receiver.

-- One (1) antenna.

-- One (1) source of electrical power.

-- One (1) licensed operator, either in attendance

or responsible for the station's remote operation.

Any individual station may be enhanced, modified, embellished, or enlarged,

in virtually unlimited ways, from this absolute minimum list.

My suggestion is to take your voltmeter, measure the voltage between the center

pin and shell of the cigarette lighter socket in the car, and note the polarity there.

The shell is the grounded side of the lighter socket.

Jason was let go on the request of Dean.They had a falling out in their personal life and Dean demanded Jason be fired. Something erupted at SausageFest and the team's vacation was extended to try and sort it out but in the end Dean threatend to walk away unless changes were made and Corus caved. Jason will be fine, he was given a large severance package, and already had offeres from other stations.