Monthly Archives: June 2010

Common Causes of High SWR


There are many things other than the antenna that can cause high SWR. SWR meter readings take into consideration the antenna, the coaxial cable, the mount, the mounting location, the vehicle and objects in the antennas near-field environment. We broke … Continue reading

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Simbol Skema Peralatan Elektronik


The schematics symbols for most major electrical components can be found in this table. However, each component may have numerous possible representations. In cases where there is more than one common symbol, pls ask help from pakcik google.

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Antenna Basic Theory.


Antenna An antenna is a device that transmits and/or receives electromagnetic waves. Electromagnetic waves are often referred to as radio waves. Most antennas are resonant devices, which operate efficiently over a relatively narrow frequency band. An antenna must be tuned … Continue reading

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Transistor Circuit Test And Fault Finding Using A Multimeter


* some of the key points to note and hints and tips for testing and fault finding a transistor circuit including those in a radio with a multimeter. One of the main uses for multimeters whether they are analogue multimeters … Continue reading

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Walkie-talkies in Amateur radio


Walkie-talkies (also known as HTs or “handheld transceivers” ) are widely used among amateur radio operators. While converted commercial gear by companies such as Motorola are not uncommon, many companies such as Yaesu, Icom, and Kenwood design models specifically for … Continue reading

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Coaxial cable how it works.


Like any electrical power cord, coaxial cable conducts AC electric current between locations. Like these other cables, it has two conductors, the central wire and the tubular shield. At any moment the current is traveling outward from the source in … Continue reading

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How Radio Waves Carry Information


Sending Information With Radio Waves Process Diagram Radio waves can be modified to carry information in many ways.  Three ways are shown and described below. The “Audio-frequency waves” shown below might be the electrical signal produced by a microphone when you … Continue reading

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