How much fuel is in your battery?

How 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 […]

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How to calculate decibels

Are 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 […]

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Product of Interest…

Inexpensive 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 […]

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Duplexer or Diplexer

Confused? 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 […]

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What is Emphasis?

With any electrical signals, being the transmission over wires or radio, or the process of converting analog to digital or for whatever purpose, this will require some form of signal conditioning. The reason is that the converting process creates problems either to obtain acceptable signal to noise ratio or signal linearity. With digital conversion of an analog system the technique […]

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Simple compressor limiter

Simple compressor limiter Some years ago I designed a peak limiter to achieve more speech power when using single side band transmission, at the time National Semiconductors made a compressor IC that allowed to adjust the centre frequency thus where the compression took place. This value of C was such that it accommodated the frequency range of 300 Hz to […]

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New link – great read

Telecommunication is the ability to send information over long distances. It’s the way we communicate with each other, whether we’re down the street or across the world. Telecommunications have been around since the earliest days of humanity, though the technology has changed a lot since then… With thanks to Steven and Tyler Neale of the USA. Tyler found our website […]

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