HF Ionospheric Propagation
Ionospheric propagation is one of the key modes of propagation used in the MF and HF bands enabling distances of thousands of kilometres to be reached.
Radio & electronics tutorials and notes covering basic concepts, components, radio technology, constructional techniques, ham radio, & electronics history…
Electronics Notes is written and run by Ian Poole
History of the Vacuum Tube
Read all about the history of the vacuum tube or thermionic valve: initial discoveries, Fleming's diode valve, de Forest's Audion, the directly and indirectly heated cathodes, . . their rise and fall.
Oscilloscope Probes
Oscilloscope probes are very important when using an oscilloscope - a good can enable the scope to perform to its specification, but a poor probe can impair performance. Know your probes and make sure you get the best performance.
Electronics Notes Videos
New content: Thinking of looking at and buying a USB charger for use in your automobile. Check out what to think about . . .
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What's on ElectronicsNotes:
Buying Guides
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When looking to buy electronic gadgets, equipment, or even components, it helps to know what to look for. Check out our informed buying guides to make sure you buy the right item.
Testing & Test Equipment
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All aspects electronics testing, test methods, and test equipment including oscilloscopes, test meters, spectrum analyzers and all forms of test equipment.
Electronic components
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Electronics Notes provides tutorials and information on many electronic components found in electronic circuits ranging from resistors and capacitors through simple semiconductors to complete integrated circuits. Introductions to in-depth information.
Connectivity
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Connectivity both wired and wireless is an essential part of life today. Broadband, Wi-Fi, Bluetooth, mobile communications and many more forms of communication are all widely used.
Basic concepts
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Learn about the basic electronics concepts including voltage, current, resistance and many basic calculations.
Radio
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Radio technology is being used increasingly within everyday life. From broadcast radio and cellular phones to Wi-Fi and other wireless technologies it is widely used. Find out all you need to learn about radio and radio circuits on Electronics Notes.
Circuits & circuit design
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Circuits and circuit design techniques for everthing from bipolar transistors and FETs to operational amplifiers, power supplies and much more.
Ham radio
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Electronics Notes provides the tutorials and the basic information you need to know to get started and learn about the fascinating hobby of amateur radio from operating, Morse code and DXing through to summaries of the ham radio allocations.
Constructional techniques
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Anyone interested in electronics will want to build some equipment - making electronics projects is fascinating, instructive and fun. Learn about soldering and see our hints and tips for constructing electronic equipment - an essential skill for makers.
Audio Visual
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This section of Electronics Notes gives descriptions, summaries and tutorials about AV, Audio Visual topics from television to Hi-Fi and systems and from the interface standards like SCART, HDMI and the like to descriptions of loudspeakers, etc..
Antennas and propagation
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Learn about antennas with our detailed notes, descriptions, summaries of antennas, what they are, how they work, antenna designs and also radio propagation - how radio signals travel.
Jobs & Careers
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Career and job information for those interested in becoming an electronics engineer. Everything from what an electronics engineer may do, through to applying for a job, writing a CV and much more.
History More
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Morse Telegraph History
Morse keys, the Morse Code and the associated Morse telegraph system revolutionised communications and enabled messages to be sent almost anywhere very quickly. -
Alessandro Volta
Pioneer of electrical science who gave his name to the Volt.
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Andre-Marie Ampere
The man who gave his name to the Amp, the unit of electrical current.
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Thomas Alva Edison
The man, his inventions, and his invention factory.
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Michael Faraday
The Father of Electrical Engineering
