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Low Power Broadcasting with Carrier Current

Carrier Current Broadcasting injects an AM radio signal into a building or neighborhood electrical system. This strategy allow a low power, unlicensed station to broadcast to receivers near the electrical wires carrying the AM broadcasting signal. This can be a simple and relatively inexpensive means to start a radio station where the broadcaster has access to the electrical distribution system. Special equipment is used to connect an AM transmitter into the electrical system for broadcasting.

General information on Carrier Current:
AM Carrier Current Broadcasting from the short-lived Hobby Broadcasting Magazine, Part 1 and Part 2
Carrier Current Broadcasting Theory from the mysterious LPB
Carrier Current Techniques an older but all-inclusive handbook, including transmitter and coupler schematics.
Radio Systems' Carrier Current page
Carrier Current Couplers are featured on page 30 of Cunningham's Low Power Radio Broadcasting handbook.

Carrier Current Transmitter Plans
A Simple 2 Watt Tube Carrier Current AM Broadcast Transmitter
Build This: Carrier Current Audio Transmitter
Enhancing the Ramsey AM-25 (for carrier current use) by George Trinkaus
'Part 15' Broadcast Band Transmitter -Now living on the Internet Archive.
As always, be careful around electricity!!!

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Get on the Air with One Click, Buy a Transmitter Bundle from Amazon.com

Many hobbyists agree that the F-S variable power 0.1 to 0.5 W FM Transmitter is one of the best transmitters for the price.  Add the convenience of a selection of premium quality accessories and you can literally be on the air with a single click.
     No need to search the web for FM broadcast antenna, FM transmitter antenna plans or FM broadcast antenna diy, this great combo includes an F-S Electronics RangeBooster 2.0 Ground Plane Antenna. 
     Connect your antenna to the transmitter with your included ultra low-loss  (55.4 db/100m), 8 mm diameter,  rugged class 8D broadcasting cable and add your programming with the included 6 foot heavy duty stereo audio cable. 
     Necessary adapters are included, too - a simple and cost-effective solution to increase your range, minimize signal loss and maximize your broadcasting enjoyment.
     Peace of mind with the lifetime warranty.

Check out these reviews from real users:

• "All components of the bundle are high quality."
• "The Rangebooster antenna definitely extends the range"
• "Signal goes through brick-metal buildings and embankments as if they were not there"
• "The transmitter unit defaults to .1 watts which is how I've been using it."
• "I am able to get more range with the external antenna"
• "Set up was so easy. The sound quality was awesome. I love this transmitter!"
• "The transmitter works well given I am out in the 'bush' away from town"
• "Worked great right out of the box. Very pleased!!"
• "It is a very compact and easy to use transmitter with impressive stereo fidelity"

So quit wishing and waiting, quit struggling with inferior approaches and “Git er dun!”
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Bundle Deal #1: F-S 0.1 - 0.5 Watt Long Range FM Transmitter, RangeBooster 2.0 Professional Grade Antenna Kit, Broadcasting and Audio Cables ($300 value!)

Bundle Deal #2: 0.5 W Fail-Safe Long Range FM Transmitter FS CZH-05B + Rangemax 1.0 Antenna ($200 value!)
Bundle Deal #3: Fail-Safe 0.5 W Long Range FM Transmitter + 1/4 Wave GP Antenna Kit ($200 value!)
Power Blaster Bundle Deal #4: Fail-Safe RangeStud 15 WATT FM Transmitter + RangeMax Professional Grade Antenna ($400 value!)