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Topic: General

The new items published under this topic are as follows.

Mycal's Simple J-Pole Antenna

Posted by: TecSpectr on Saturday, April 17, 2010 - 10:44 PM
General 

After experimenting with about every kind of "three meter" antenna ever designed, we keep on returning to our old standard - the J-Pole. The following article and illustration have been shamelessly lifted from Mycal's site at http://www.mycal.net/old/projects/mpr/jpole.htm - Here's to Mycal..





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Choosing An Exciter

Posted by: TecSpectr on Sunday, July 19, 2009 - 09:31 PM
General 
An exciter, also commonly called a “transmitter”, takes an audio feed, and turns it into a radio wave. All FM exciters operate on the same essential principle. First an oscillator produces a “very high” frequency carrier wave – somewhere between 88000 and 108000 cycles per second. An audio signal is then used to dynamically “modulate” the carrier wave, causing slight variations in that frequency. Most exciters make use of at least one RF amplifier stage to amplify the modulated carrier wave (radio wave). Finally, the radio wave is used to vibrate an antenna. If done well, those vibrations will travel about until they reach your receiver’s antenna.




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Why Pirate Radio?

Posted by: TecSpectr on Sunday, July 19, 2009 - 08:28 PM
General 

There are definitely a dozen or more reasons why people build and operate pirate radio stations. These reasons range from noble to ignoble, from practical to bizarre. And if you’re reading this, you’re probably brilliant – and you have a screw loose. Who else after all would purposefully go to the (huge) bother of building and deploying a broadcast radio station under the risk of incurring a (huge) fine?





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