Radio tagged posts

Radio

Some cool radio images:

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Image by Thomas Beck Photo

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Image by get directly down

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Image by Michael Cory

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Nice Radio photos

A few nice radio images I found:

radio
radio
Image by Gerard Stolk (vers le 14 juillet)
nostalgie

RADIO
radio
Image by Jeff Holt UK Photographer

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Philippines Radio

The Philippines are a vibrant place with their own style of music. But you can also access many other types of music from the Philippines, including hip hop and rock, thanks to internet FM Philippines radio.

The music of the Philippines is a diverse mixture of the original music of the islands, along with European, Asian, and American and Latin American influence. The traditional music reflects the common peoples’ lives, and it’s more influenced by rural than urban folk music. Many traditional songs on Philippines radio connect with nature in some way.
The overall radio music scene in the Philippines is a lot like the country itself, in that the music has been influenced a great deal by all the culture that has been brought there. Traditional music may be Western or non-Western in nature, and each indigenous form shows the culture of the group that originated it.

Internet radio brings the songs of the Philippines to you, wherever you are, and it also allows those in the Philippines to listen to many types of music that are different than the styles that are native to the area.

Internet radio has been in use since the 1990’s. It has undergone many changes, including advances in technology. You can find out the hours when your favorite Philippine disc jockey will be on the air, and the songs he or she will be playing at the time.

Philippines Radio can now be heard all over the globe, and music that originated in other areas can be heard in the Philippines. The radio stations are also helpful in providing weather and news reports, and talk shows.

Streaming radio is an important platform for locals to keep their ear to the music and news that is important to them. Likewise, it can keep people in other countries aware of the music and news of the Philippines. Advertisers on internet Philippines Radio can get their messages across to people that are interested in their products and services, not just locally but to a worldwide market. Internet radio is a very effective way to reach many people.

Philippines radio music appeals to a wide variety of listeners, whether your preferred music is rock, hip hop, dance or reggae. While younger users will use internet radio more than older users, the stations can offer advertising advantages for all age groups.

Radio stations online are easily accessible through the portal at WebTechies.fm. Technology has steadily advanced, so that you can keep your hand on the pulse of the music scene a half a world away.

If you enjoy the music of the Philippines, or if you live in the Philippines and want to access the various types of music in your area, online radio can help keep you connected. You always have a large choice in radio stations that play a variety of music genres.

If you enjoy the music of the Philippines, or if you live in the Philippines and want to access the various types of music in your area, online Philippines Radio can help keep you connected. You always have a large choice in radio stations that play a variety of music genres.

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Radio Advertising

Advertising is a form of communication intended to persuade an audience (viewers, readers or listeners) to take some action. It includes the name of a product or service and how that product or service could benefit the consumer, to persuade potential customers to purchase or to consume that particular brand. Modern advertising developed with the rise of mass production in the late 19th and early 20th centuries.

Advertising is a brilliant idea to increase business for all type business. Radio is still surprisingly inexpensive for advertising. The medium has been around for about 100 years. Many businesses give radio a pass because of the misconception of the return on investment.

The greatest advantage of radio is its ability to go after a very specific kind of market. Print & Radio Power (http://www.printandradio.com/) is the largest pre-buyer of national radio advertising and print advertising. It own multi-million dollar blocks of national radio advertising network time. This media gives its clients consistent profitable returns on their media dollars. Local, regional, nationalâ?¦straight media or performance based.

Today, everyone talks about ROI and the need to make marketing more accountable. Print and radio advertising measurement systems tells which media components work, for rapid ROI improvements. Print & Radio is the largest pre-buyer of national print advertising. In print media, the advantage of catering to specific target audience opens up countless opportunities to enhance sales figures. A fashion magazine would highlight cosmetic products and fashion accessories. At the same time, a sports magazine would display sports related ads to cater to its readers. There is no wastage of resources as ads get to reach the target audience.

Print & Radio Power uniquely drives this demand for high dollar and financial concern through direct response and cost per call radio advertising. They offer programs that cut the risk of advertising by clients, through the use of some programs.

Print and radio also provide Hispanic Advertising. The Hispanic population generally spends an average of 26-30 hours a week listening to the radio â?? 13% more than the rest of the population. Additionally, readership of weekly community and free newspaper remains high and consistent.

Print and Radio is providing all advertising opportunities at one place.

Mary john brought up in Newyork and love fun and Entertainment in her city. She is busy and enjoying to write the articles on advertising topics . She always likes to help the people.

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Radio Receiver Design

radio
by EgoAnt

Basic designs

Crystal radio

Main article: Crystal radio receiver

A crystal set receiver consisting of a antenna, a variable inductor, a cat’s whisker, and a capacitor.

Advantages

Simple, easy to make. This is the classic design for a clandestine receiver in a POW camp.

Disadvantages

Insensitive, it needs a very strong RF signal to operate.

Poor selectivity, it often only has only one tuned circuit.

Direct amplification

Main article: directly amplifying receiver

The directly amplifying receiver contains the input radio frequency filter, the radio frequency amplifier (amplifying radio signal of the tuned station), the detector and the sound frequency amplifier. This design is simple and reliable, but much less sensitive than the superheterodyne (described below).

Reflectional

Main article: reflectional receiver

The reflectional receiver contains the single amplifier that amplifies first radio, and then (after detection) sound frequency. It is simpler, smaller and consumes less power, but it is also comparatively unstable.

Regenerative

Main article: Regenerative circuit

The Regenerative circuit has the advantage of being potentially very sensitive, it uses positive feedback to increase the gain of the stage. Many valved sets were made which used a single stage. However if misused it has the great potential to cause radio interference, if the set is adjusted wrongly (too much feedback used) then the detector stage will oscillate so causing the interference.

Regenerative Receiver Schematic

Tuned radio frequency

Main article: Tuned radio frequency receiver

the RF interference that the local oscillator can generate can be controlled with the use of a buffer stage between the LO and the Detector, and a buffer or RF amp stage between the LO and the antenna.

Direct conversion

Main article: Direct-conversion receiver

In the Direct conversion receiver the signals from the aerial pass through a band pass filter, and an amplifier before reaching a non-linear mixer where they are mixed with a signal from a local oscillator which is tuned to the carrier wave frequency of an AM or SSB transmitter. The output of this mixer is then passed through a low pass filter before an audio amplifier. This is then the output of the radio.

For CW morse the local oscillator is tuned to a frequency slightly different from that of the transmitter to make the received signal audible.

Advantages

Simpler than a superhet

Better tuning than a simple crystal set

Disadvantages

Less selective than a superhet with regard to strong in-band signals

A wider bandwidth than a good SSB communications radio, this is because no sideband filtering exists in this circuit.

Superheterodyne

Main article: Superheterodyne receiver

Here are two superheterodyne designs for AM and FM respectively. The FM design is a cheap design intended for a broadcast band household receiver.

A schematic of a superhet AM receiver. Note that the radio has a AGC loop.

For single conversion superheterodyne AM receivers designed for mediumwave and longwave the IF is commonly 455 kHz.

A schematic of a simple cheap superhet FM receiver. Note that the radio lacks a AGC loop, and that the IF amplifier has a very high gain and is driven into clipping.

For many single conversion superheterodyne receivers designed for band II FM (88 – 108 MHz) the IF is commonly 10.7 MHz. For TV sets the IF tends to be at 33 to 40 MHz.

FM vs. AM

To make a good AM receiver an automatic gain control loop is essential; this requires good design. To make a good FM receiver a large number of RF amps which are driven into limiting are required to create a receiver which can take advantage of the capture effect, one of the biggest advantages of FM. With valved (tube) systems it is more expensive to make active stages than it is to make the same number of stages with solid state parts, so for a valved superhet it is simpler to make an AM receiver with the automatic gain control loop while for a solid state receiver it is simpler to make an FM unit. Hence even while the idea of FM was known before World War II its use was rare because of the cost of valves – in the UK the government had a valve holder tax which encouraged radio receiver designers to use as few active stages as possible, – but when solid state parts became available FM started to gain favour.

Automatic gain control

Main article: Automatic gain control

Further reading

Radiocommunication handbook (RSGB), ISBN 0-900612-58-4

References

^ Cheney, M., Uth, R., & Glenn, J. (1999). Tesla, master of lightning. New York: Barnes & Noble Books. Page 71.

Categories: Radio electronicsHidden categories: Articles lacking sources from February 2008 | All articles lacking sources | Wikipedia articles needing context from October 2009

I am China Manufacturers writer, reports some information about plastic tube extrusion , wheeled carts.

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Advertising on Radio

Advertising is a form of communication intended to persuade an audience (viewers, readers or listeners) to take some action. It includes the name of a product or service and how that product or service could benefit the consumer, to persuade potential customers to purchase or to consume that particular brand. Modern advertising developed with the rise of mass production in the late 19th and early 20th centuries.

 

Advertising is a brilliant idea to increase business for all type business. Radio is still surprisingly inexpensive for advertising. The medium has been around for about 100 years. Many businesses give radio a pass because of the misconception of the return on investment.

 

The greatest advantage of radio is its ability to go after a very specific kind of market. Advertising on radio is the largest pre-buyer of national radio advertising and print advertising. It own multi-million dollar blocks of national radio advertising network time. This media gives its clients consistent profitable returns on their media dollars. Local, regional, nationalâ?¦straight media or performance based.

 

Today, everyone talks about ROI and the need to make marketing more accountable. Print and radio advertising measurement systems tells which media components work, for rapid ROI improvements. Print & Radio is the largest pre-buyer of national print advertising. In print media, the advantage of catering to specific target audience opens up countless opportunities to enhance sales figures. A fashion magazine would highlight cosmetic products and fashion accessories.

 

At the same time, a sports magazine would display sports related ads to cater to its readers. There is no wastage of resources as ads get to reach the target audience. They offer programs that cut the risk of advertising by clients, through the use of some programs.The Hispanic population generally spends an average of 26-30 hours a week listening to the radio â?? 13% more than the rest of the population. Additionally, readership of weekly community and free newspaper remains high and consistent.

 

The internet has transformed the way the world works in so many ways it is impossible to document. Of recent with the development of the dynamic web and free access to the internet we are seeing the decline of traditional media sources and the birth of online internet radio, TV, podcasts and ezines. People are no longer the confined audience of what the big networks deem is important according to their advertisers and big sponsors.

 

Radio Advertising Costs has a growing user base of both broadcasters and listeners. People are broadcasting their messages to their niche audience. Most of it would never have seen the light of day with traditional media outlets. These niche audiences are thirsty for good content pertinent to their interests. With the relatively low cost of software and the profusion of social networks like YouTube, Blogtalk Radio and Ustream there are more and more free internet radio stations hitting the airwaves all the time. Some people even speculate that the music industry will have a rebirth of sorts using these streams and the power of community connection.

 

For those that are going big and developing a business model around their broadcasting there is still cost involved to running it before going into profit. To make it a business success it is important to monetize what is being built. Once a large audience of 50 thousands listeners is achieved, companies wanting to connect with a particular group will be open to buying online radio advertising in the form of 30 second radio ads and infomercials or branded shows.

I am Mohan read mathematics at Stanford and remained there for his MS. From 1998-1999 on researched in Evolution and in Animal Behavior in  Camrbidge, UK. I was was then a professor in the departments of Anthropology and Biology, New Jersy College, USA. Now teaches at the department of Zoology. Carried out research in several areas of evolutionary biology, particularly in sexual selection and the comparative method.

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Radio

Check out these radio images:

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radio
Image by elisabet.s

Radio
radio
Image by Dvortygirl
Also in the Motala Motor Museum.

Radio
radio
Image by Emilia113
Ikea frames work wonders! They fit all kinds of small stuff in them.

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Trunked Radio System

Principles of operation

See also: Erlang (unit)

Control channels

In essence, a trunked radio system is a packet switching computer network. Users’ radios send data packets to a computer, operating on a dedicated frequency called a Control Channel to request communication on a specific talk-group. The controller sends a digital signal to all radios monitoring that talkgroup, instructing the radios to automatically switch to the frequency indicated by the system to monitor the transmission. After the user is done speaking, the users’ radios return to monitoring the control channel for additional transmissions.

This arrangement allows multiple groups of users to share a small set of actual radio frequencies without hearing each others’ conversations. Trunked systems primarily conserve limited radio frequencies and also provide other advanced features to users.

Comparison with telephone trunking

The concept of trunking (resource sharing) is actually quite old, and is taken from telephone company technology and practice. Consider two telco central office exchanges, one in town “A” and the other in adjacent town “B”. Each of these central offices has the theoretical capacity to handle ten thousand individual telephone numbers. (Central office “A”, with prefix “123”, has available 10,000 numbers from 123-0000 to 123-9999; central office “B”, with prefix “124”, the same.)

How many telephone lines are required to interconnect towns A & B? If all 10,000 subscribers in “A” were to simultaneously call 10,000 subscribers in “B”, then 10,000 lines, (in telco parlance “trunk lines”, or simply “trunks”) would be required between the two towns. However, the odds of that happening are remote. Telephone companies have well-proven formulas which predict the optimal number of trunk lines actually needed, under normal conditions, to interconnect two telephone exchanges.[citation needed]

This concept has simply been applied to radio user groups, to determine the optimal number of channels needed, under normal conditions, to accommodate a given number of users. In the event of a widespread emergency such as a major earthquake, many more users than normal will attempt to access both the telephone and radio systems. In both cases once the trunking capacity of the systems is fully used, all subsequent users will receive a busy signal.

In our example of police dispatch, different talk-groups are assigned different system priority levels, sometimes with “preempt” capability, attempting to ensure that communication between critical units is maintained.

Differences from conventional two-way radio

“Trunked” radio systems differ from “conventional” radio systems in that a conventional radio system uses a dedicated channel (frequency) for each individual group of users, while “trunking” radio systems use a pool of channels which are available for a great many different groups of users.

For example, if police communications are configured in such a way that twelve conventional channels are required to permit citywide dispatch based upon geographical patrol areas, during periods of slow dispatch activity much of that channel capacity is idle. In a trunked system, the police units in a given geographical area are not assigned a dedicated channel, but instead are members of a talk-group entitled to draw upon the common resources of a smaller pool of channels.

Advantages of trunking

Trunked radio takes advantage of the probability that with any given number of user units, not everyone will need channel access at the same time, therefore fewer discrete radio channels are required. From another perspective, with a given number of radio channels, a much greater number of user groups can be accommodated. In the example of the police department, this additional capacity could then be used to assign individual talk groups to specialized investigative, traffic control, or special-events groups which might otherwise not have the benefit of individual private communications.

To the user, a trunking radio looks just like an “ordinary” radio: there is a “channel switch” for the user to select the “channel” that they want to use. In reality though, the “Channel switch” is NOT switching frequencies as in a conventional radio but when changed, it refers to an internal software program which causes a talkgroup affiliation to be transmitted on the control channel. This identifies the specific radio to the system controller as a member of a specific talkgroup, and that radio will then be included in any conversations involving that talkgroup.

This also allows great flexibility in radio usage – the same radio model can be used for many different types of system users (IE. Police, Public Works, Animal Control, etc.) simply by changing the software programming in the radio itself.

Trunked radio systems also provide a small level of extra privacy since the talkgroups are constantly transmitting on different frequencies. This makes it difficult for a scanner listener without a programmed trunk tracking scanner to keep up with the conversation.

Notes

^ Talk groups, scanning, and group calls are defined in, “Section 2: Needs Summary,” Arizona Phase II Final Report: Statewide Radio Interoperability Needs Assessment, Macro Corporation and The State of Arizona, 2004, pp. 16.

^ US Patent and Trademark Office Registration Number 2407576, Serial Number 75400608, registered to Uniden America Corporation.

Types of trunked radio systems

Ericsson GE

EDACS Provoice

EDACS

GE Mark V

Logic Trunked Radio

LTR Standard

LTR Passport

LTR Standard and Passport

LTR MultiNet

LTR-Net

Motorola

Type I

Type II

Type IIi Hybrid

Type II SmartZone

Type II SmartZone OmniLink

iDEN (integrated Digital Enhanced Network)

Motorola Harmony (see iDEN)

MPT-1327

OpenSky System

APCO Project 16

APCO Project 25

SmarTrunk

TETRA

TETRAPOL

vde

Trunked radio systems

Central controller

Motorola systems: Type I Type II Type IIi Hybrid Type II SmartZone Type II SmartZone OmniLink iDEN

Other: APCO Project 16 APCO Project 25 EDACS EDACS Provoice MPT-1327 OpenSky TETRA TETRAPOL

Scan-based / distributed control

General Electric Mobile Radio: GE Marc V

Logic Trunked Radio: LTR Standard LTR Passport LTR Standard and Passport LTR MultiNet LTR-Net

vde

Two-way radio

Amateur and hobbyist

Amateur radio Amateur radio repeater Citizens’ band radio Family Radio Service General Mobile Radio Service Mobile rig Multi-Use Radio Service PMR446 LPD433 UHF CB (Australia)

Aviation (aeronautical mobile)

Air traffic control Aircraft emergency frequency Airband Mandatory frequency airport Single Frequency Approach UNICOM

Land-based commercial and government mobile

Business band Base station Mobile radio Professional Mobile Radio Radio repeater Specialized Mobile Radio Trunked radio system Walkie talkie

Marine (shipboard)

2182 kHz 500 kHz Coast radio station Marine VHF radio Maritime mobile amateur radio

Signaling / Selective calling

CTCSS Dual-tone multi-frequency D-STAR MDC-1200 Push to talk Quik Call I Quik Call II Selcall

System elements and principles

Antenna Audio level compression Automatic vehicle location APRS Call sign CAD DC remote Dispatch Fade margin Link budget Rayleigh fading Tone remote Voice procedure Voting (diversity combining)

Categories: Trunked radio systems | Telecommunications terms | Radio resource management | Radio networksHidden categories: All articles with unsourced statements | Articles with unsourced statements from October 2008

I am an expert from China Manufacturers, usually analyzes all kind of industries situation, such as jamesbury valve , butterfly valve china.

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Radio Controlled Clock

A radio controlled clock offers many advantages over conventional clocks. They can keep perfect time without ever having to be adjusted. That’s right you never even have to adjust them for daylight savings time. This type of clock is found in all sorts of applications including wrist watches, wall, alarm and travel clocks.

How it clock works

Although some manufactures say their radio controlled clocks are atomic clocks this is not really true. An atomic clock is operated by a atomic oscillator, while a radio controlled clock has a small radio inside. The radio inside receives a signal from an atomic clock.

The signals received by most radio controlled clocks in America originate near Fort Collins, Colorado from the NIST radio station WWVB. The radio station broadcasts on 60KHZ frequency and the clock with its miniature radio inside is tuned to receive the signal.

The signal 60KHZ is located so far below most other radio signals that it is not interrupted by any other signals put out by radio or television. The signals from radio and television stations are generally transmitted at no lower then 530KHZ. The 60 KHZ can not carry voice or audio and only transmits a code. The code that is broadcast is a binary code or bits and are sent at a slow rate of one bit per second. It is so slow that it takes a full minute to generate a complete time code. This slow rate is why the first time you set it may take up to five full minutes to show the correct time.

Once the clock has received and decoded the code sent from the radio station it will then apply a time zone correction so that it shows local time. The radio station provides the time as Universal Time. When your clock is set and running for the first time it probably will not read the radio signal for at least 4 hours and more likely will only do so once a day. Instead it uses a quartz crystal oscillator to keep time.

Radio controlled clocks are very accurate time keepers that actually set themselves one or more times per day. They use a 60KHZ low frequency signal from a radio station to set themselves so they are always right even during daylight savings time.

Another type of radio controlled clock is radio controlled digital clock, to know more about it visit ATSClock.com

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Today’s Radio

radio
by sm3287

Radio today sucks. It just does. I love music. I don’t love hearing the same 80’s rock all day long though. If I have to hear one more AC/DC song or something by Twisted Sister, I’ll go back in time and make sure that Dean Schneider played the fiddle. The main problem with modern radio is that the freedom is gone. The large corporations are pushing a little too hard. Yes, they make lots of money by playing the same twelve songs all day long, but come on.

Music as a whole is suffering because of it. I challenge you to write down over forty different songs in a day, even twenty. Good luck. The same 80’s power ballads are played multiple times in a day. Where is the new music? By new, I mean songs by artists I haven’t heard. Not the next Nickelback hit that they cut from their money making cookie cutter. I’m almost at the point where I’m going to put a country CD in just to ease the suffering.

I never witnessed it, but my dad says radio used to be cool. There was some rockin’ guy who’d spin the tunes he felt like playing that night. A DJ now presses play on his pre-loaded list that the big corporations are pushing with everything they can muster. Good morning! Here’s your daily dose of AC/DC and Twisted Sister.

The small time stations just can’t compete. It saddens me that there are is an unending supply of new amazing artists just waiting to be heard. Bands like Sphongle, London Elektricity, Animal Collective, The Mountain Goat, Fever Ray, and Movitz. Where is a station that plays their music? There isn’t one. If I heard a new song on the radio I would be ecstatic. I need my faith renewed in radio. I’ve slowing been growing less and less fond of the whole radio idea in general due to the the executives in suits. Everything is getting less personal now.

Let’s stop a random person and play what they have on their MP3 player day. That sounds exciting! Also, these companies are missing an influential group of people that is only getting stronger. People aged 14-25 have no real way to relate to the songs they hear. I didn’t grow up to these songs, they mean nothing to me. I’m not alone in this. We need new music. The executives can still make their millions and drive their Lamborghini, all we ask for is some variety. Surely I’m not alone. What do you think?

http://theonlinecollective.blogspot.com/ – The largest collection of anonymous online knowledge on the Internet is starting. Contribute now.

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