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2. Radio receiver design - Wikipedia

   en.wikipedia.org/wiki/Radio_receiver_design

   A crystal set receiver consisting of an antenna, a variable inductor, a cat's whisker, and a filter capacitor. A crystal receiver is very simple and can be easy to make or even improvise, for example, the foxhole radio. However, the crystal radio needs a strong RF signal and a long antenna to operate.

3. Belling-Lee connector - Wikipedia

   en.wikipedia.org/wiki/Belling-Lee_connector

   Female Belling-Lee connector on a television set. The Belling-Lee connector (also type 9,52, but largely only in the context of its specification, IEC 61169, Part 2: Radio-frequency coaxial connector of type 9,52) [1] is commonly used in Europe, parts of Southeast Asia, and Australia, to connect coaxial cables with each other and with terrestrial VHF/UHF roof antennas, antenna signal ...

4. List of Arduino boards and compatible systems - Wikipedia

   en.wikipedia.org/wiki/List_of_Arduino_boards_and...

   A very power efficient breadboard friendly Arduino compatible board with onboard RFM69W/RFM69HW transceiver and a stock speed of 16 MHz @ 3.3 V. You can solder your own antenna or connect an antenna via U.FL connector. Bare Bones Board [159] (BBB) and Really Bare Bones Board [160] (RBBB) Modern Device

5. Rabbit Ears Redux: Antennas for Free Broadcast TV Make ... - AOL

   www.aol.com/news/2011-11-02-rabbit-ears-redux...

   TV lovers hit by the weak economy and fat cable bills are going old-school. More and more people are using antennas to get free programming. That's right: The pair of rabbit ears that your ...

6. Radio repeater - Wikipedia

   en.wikipedia.org/wiki/Radio_repeater

   If four transmitters are coupled to one antenna, a quarter of each transmitter's power will reach the output of the combining circuit. Part of this loss can be made up with increased antenna gain. Fifty watts of transmitter power to the antenna will make a received signal strength at a distant mobile radio that is almost identical to 100 watts.

7. Radio transmitter design - Wikipedia

   en.wikipedia.org/wiki/Radio_transmitter_design

   A radio transmitter design has to meet certain requirements. These include the frequency of operation, the type of modulation, the stability and purity of the resulting signal, the efficiency of power use, and the power level required to meet the system design objectives. [1]