A friendly group of amateur radio enthusiasts
Kelly is from Charleston, South Carolina and she recently sent the below email to our secretary Russell Jacobs – VK2BJP. Very nice to know our website is being read from so far away! “Hi Mr. Jacobs, I hope your week is going well so far! My daughter Danielle has been spending some time with her grandparents when school gets out before […]
Read moreUnderstanding modern digital modulation techniques Fundamental to all wireless communications is modulation, the process of impressing the data to be transmitted on the radio carrier. Most wireless transmissions today are digital, and with the limited spectrum available, the type of modulation is more critical than it has ever been. Read the full PDF article here: Source: Electronic Design. Lou Frenzel […]
Read moreDigital Voice Radio just became a lot easier “In the not so distant past”Sounds like the preamble of a book or movie. If you, are about to make the move into digital radio, you will be presented with choices, these will have an impact on your pocket and whom you will be able to talk to. Looking for what gives […]
Read moreThe World of Amateur Radio-Amateur Radio Vintage Film The History of Radio documentary Thanks to Rob VK2YMU for sending in these treasures!
Read moreWireless-X The Bible By Dewey L. Hee WB7OEV In his Prior life was a System Administration working for the Boeing Company. He became interested in Amateur radio while working for the Boeing company in 1972… He began to wonder what else he could do with the FTM 400 and discovered this mode called Fusion, (CFM) and got bitten with the […]
Read moreDigital Radio Hot Spot If you’re like me, deciding to embark upon the world of digital radio, confusion is likely to be the result, likely to make you abandon the whole idea, going back to what you know and understand. However the digital mode experiencing rapid growth is DMR, but like all the others, requires a radio that uses that […]
Read moreHow much fuel is in your battery? The best way to determine the state of charge of a battery A battery is a store of energy. It can be considered as a container of water that is either full or empty. With a water container it’s easy to determine how much water you have left in the container. Similarly on […]
Read moreAre You Confused On How to Calculate Decibels? What is a logarithm ? The simplest definition of a logarithm is that of numerical result of a number raised to some power For example 10 x 10 = 100 can also be written as 10¬2 or Log10 (100) Note that in the statement “Log10” the base is stated with the number […]
Read moreFinding, solving and preventing intermodulation problems Simply put, actually too simply put, intermodulation (IM) products are interference. They are undesired interference to a desired signal from a destructive combination of transmitted… Read the complete PDF article here>
Read moreDIY Solar System For Your Home Back in 2013 I decided to install a home solar system to reduce the cost of electricity. I missed out on the premium export tariff. By 2013 the 60 or 40 cents per KWh where no longer on offer… Rob VK2YMU Click here to download the PDF and read the full article>
Read moreInexpensive VHF/UHF Band HAM Amateur Radio Modules DRA818V/U DRA818V or U is a type of compact wireless voice transceiver module based on RFIC and works in VHF or UHF bands. It integrates high speed microcontroller, high performance wireless transceiver IC, high power PA, audio process and squelching circuits. It provides standard UART interface which users can easily configure appropriate parameters […]
Read moreHave you ever wondered why a VHF signal will go further than an UHF signal? The law in physics states that the power in a radio wave will decrease by the inverse of the square of the distance. Click here to read the full article> Rob VK2YMU
Read moreConfused? Essentially there is no difference, be it a Diplexer that has the capability to handle power isolating the RX, or the design allowing the split of the ports to handle power in both directions. To the purists, the definition stated in the linked site is correct, but in practice a device that either combines two differing frequencies to one […]
Read moreOf all the elements that affect the intelligibility of speech in telephony, bandwidth has been shown to be one of the most critical often neglected item in amateur communications. This article provides a good insight in the understanding of the requirements. Click here to download a PDF of the whole article>
Read more50 AMP Power Supply that won’t break the bank Available from many online sources, these switch mode power supplies offer high current capability and are so cheap, that they warrant investigation in the suitability as a radio shack power supply… Click here to download the article in PDF form> Rob VK2YMU
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