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Electronics Notes by Ian Poole

@elecnotes.bsky.social

269 followers 106 following 425 posts

My aim is to provide clear summaries & information about electronics, radio & connectivity. I’ve had a fantastic career in electronics - now I’d like to help others into it. Website: www.electronics-notes.com #electronics #RFdesign #antennas

Posts Replies Media

Electronics Notes by Ian Poole @elecnotes.bsky.social · 19/09/2026

In case you missed my post yesterday, check out my latest video. Don't Buy a Morse Key Until You See This: Xiegu VK6 Tested youtu.be/BMNEAx2D56M #hamradio #amateurradio #hsmr #morsekey #morsecode

Electronics Notes by Ian Poole @elecnotes.bsky.social · 18/09/2026

Don't Buy a Morse Key Until You See This: Xiegu VK6 Tested. Have you ever wanted to buy a Morse key paddle, but not done so because of the price. In this video I take close look to see if it’s worth it. Watch my video now: youtu.be/BMNEAx2D56M #hamradio #hamr #amateurradio #Morsecode #Morsekey

Don't Buy a Morse Key Until You See This: Xiegu VK6 Tested

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 11/09/2026

What has a vintage capacitor & a modern SMT capacitor in common? What can an old 1920s capacitor show us about modern MLCCs? And what are the really important points to note to avoid a catastrophe with your new PCB design? Watch my video now: youtube.com/shorts/LVBBZ... #capacitors #mlcc

What has a vintage capacitor & a modern SMT capacitor in common?

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 11/09/2026

Why is gold used in so many connectors if it is not the best conductor? Find out in my website article : www.electronics-notes.com/articles/ele...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 04/09/2026

The SMD Sizing Trap That Breaks PCB Layouts Have you ever fallen into the trap where there are SMT components that have the label 0402, but they can be different sizes if they are defined in the imperial or metric systems. Find out more In my video: youtu.be/dbuZxl6MiCQ

The SMD Sizing Trap That Breaks PCB Layouts

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 29/08/2026

Vanishing AM Radio: will you miss these iconic broadcasts. With medium wave broadcasts disappearing in many areas with people switching to VHF FM, digital radio & stereo, I take a nostalgic look back at these broadcasts. youtu.be/nxUIuEqrTgk #broadcasting #mediumwave

Vanishing AM Radio: will you miss these iconic broadcasts

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 14/08/2026

Bluetooth Frequency Hopping: the Tech that keeps you Connected. Watch my video to find out the really cunning technology used. Watch my video now: youtu.be/vyF9EVlVi8s #Bluetooth #bluetoothwireless #frequencyhopping #RFdesign #electronicsnotes

Bluetooth Frequency Hopping: the Tech that keeps you Connected

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 07/08/2026

How many MLCCs are made each year - can you guess? The number will surprise you until you realise that they’re in virtually every piece of electronics today. Can guess, or better still watch my short video: youtube.com/shorts/U6zZC... #mlcc #capacitor #capacitors #electroniccomponents

Electronics Notes by Ian Poole @elecnotes.bsky.social · 07/08/2026

Understanding PXI and Its Use For Test Instrumentation - Chassis, Controllers & Instrumentation. PXI is a great system that can be used for high performance testing and data collection. Discover what you need to know: youtu.be/k_JrU75M4s8 #PXI #test #electronics

PXI Architecture Breakdown - Chassis, Controllers & Instrumentation

YouTube video by ElectronicsNotes

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 06/08/2026

Who remembers the pirate radio broadcast stations that were popular around the UK and other places in the 1960s? Discover more: www.electronics-notes.com/articles/his...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 06/08/2026

RESISTORS 101: the Mysteries Unveiled Check out the things you need to know about resistors. Watch now: youtu.be/ERce1gSIKmk

RESISTORS 101: the Mysteries Unveiled

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 24/07/2026

Is the TIDRADIO TD-H3 Better Than a Baofeng? I recently bought a TIDRADIO TD-H3 - it’s a great little radio: USB-C charging (& programming) bright display, and Bluetooth programming from your phone. A great radio - find out more: youtube.com/shorts/dH5MD...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 17/07/2026

Capacitor Secrets: What’s Happening Inside an MLCC MultiLayer Ceramic Capacitor All you need to know about multilayer ceramic capacitors and a few really surprising points you need to note. youtu.be/OLNRDQGwaBw #capacitors #electronicscomponents

Capacitor Secrets: What’s Happening Inside an MLCC MultiLayer Ceramic Capacitor

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 26/06/2026

Bluetooth Explained: How It Works to the Viking Connection We use Bluetooth connectivity everyday, but how exactly does it work. Also what are the Viking and Hollywood connections ? youtu.be/KOOXkRa3big #Bluetooth #electronics

Electronics Notes by Ian Poole @elecnotes.bsky.social · 12/06/2026

Is the 2N2222 the most important transistor ever made? It isn’t the fastest, it’s certainly not the most powerful, and in an era of advanced MOSFETs and complex Integrated Circuits, how good really is it? Check out my video: youtu.be/GVhRl3gjUO0 #2N2222 #transistor #electronics

The 2N2222: The Legendary Transistor That Won’t Die

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 05/06/2026

Was the Transistor Nearly Named the Iotatron? #transistorhistory #iotatron #techhistory youtube.com/shorts/zolY5...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 28/05/2026

KILL Power Line Interference with Clip-On Ferrite Rings Find out how in my video: youtu.be/rtMagMkEbK4

KILL Power Line Interference with Clip-On Ferrite Rings

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 28/04/2026

My Secret Method for Fixing Radios & Electronic Gadgets In this video I reveal my technique for fixing radios and other electronic gadgets that are brought to me for repair. Watch my video now: youtu.be/ixBuXeBe6Uw #radiorepairs #radioservicing #testingradios #gadgetrepairs #electronicsrepairs

My Secret Method for Fixing Radios & Electronic Gadgets

YouTube video by ElectronicsNotes

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 07/04/2026

Move Over UV-5R: There’s a New King of Budget Radios. Check out my video to find out more: youtube.com/shorts/vt1RZ... #hamradio #amateurradio

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 26/03/2026

Wait... Xiegu made a Morse Key Check out this exciting Morse key as I unbox it. Find out more in my YouTube Short video: youtube.com/shorts/O7ci3... #morsekey #morsecode #hamradio #hamr #amateurradio

Wait... Xiegu made a Morse Key #Morsekey #iambic #Morsepaddle

YouTube video by ElectronicsNotes

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 24/03/2026

Understand the Ham Radio Baofeng UV-5R Controls Fast from My Video In this video I cover the basic controls of the Baofeng UV-5R amateur radio handheld transceiver. Check out my video now: youtube.com/shorts/-k13R...

Master Your Baofeng UV-5R - Fast!

YouTube video by ElectronicsNotes

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 23/03/2026

What V/UHF Budget Hand Portable Transceiver would You Choose? Years ago there was just the Baofeng UV-5R - now there are others. Get all the information: www.electronics-notes.com/store-shop/h... #hamradio #hamr #amateurradio #handportable #electronicsnotes #electronics

Electronics Notes by Ian Poole @elecnotes.bsky.social · 03/03/2026

Before Instant-On: The Hidden Physics of Vacuum Tubes (Valves) Check out my latest video: youtu.be/u_htxrYUIdw #valves #vacuumtubes #thermionicvalves #vintagetech #vintagetechnology #valves #vacuumtubes #vintagetech #vintagetechnology #electronicsnotes #electroniccomponents

Before Instant-On: The Hidden Physics of Vacuum Tubes

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 24/02/2026

Resistor Colour Codes 101 Do you ever get confused reading resistor colour codes. Check out more YouTube short video to find out more: youtube.com/shorts/A2nh4... #resistors #resistorcolorcode #resistorcolourcode #electronicsnotes #electroniccomponents #electronicsengineering

Electronics Notes by Ian Poole @elecnotes.bsky.social · 20/02/2026

Explore the fascinating history of the Morse telegraph: how it started and revolutionised communication across the distances, linking continents via undersea cables, and served as a lifeline for global shipping. Check it out now: www.electronics-notes.com/articles/his... #morse #morsetelegraph

Electronics Notes by Ian Poole @elecnotes.bsky.social · 13/02/2026

Want to understand about the different ceramic capacitor dielectrics? Check out my ‘Concise Guide to Ceramic Capacitors & Their Dielectrics’' Find out more: electronics-notes-shop.fourthwall.com/products/a-c... #electronics #capacitors #ceramiccapacitors #ebook #electroniccomponents

Electronics Notes by Ian Poole @elecnotes.bsky.social · 11/02/2026

Op Amps:- Why Are They So Useful In this video I take a look at why operational amplifier, or op-amps are so great and so useful. Watch my video now: youtube.com/shorts/YY8IX... #opamps #operationalamplifiers #circuitdesign #analogdesign #hardwaredesign #electronicsnotes #electroniccomponents

Electronics Notes by Ian Poole @elecnotes.bsky.social · 08/02/2026

MOSFET vs. IGBT – Understanding the Giants of Power Electronics IGBTs & MOSFETs are both big players in power electronics & these two types of device can be considered as rivals but it’s necessary to select the correct option for each circuit. Discover: www.electronics-notes.com/articles/ele...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 03/02/2026

Resistor Colour Code 101 - What You Need to Know In the video I provide all you need to know along with practical examples. Watch now: youtu.be/QhBJnPXN6L0 #resistors #colourcode #colorcode #resistorcolorcode #resistorcolourcode #electroniccomponents

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 20/01/2026

They were trying to invent a field effect transit instead they invented the point contact transistor. It was a great Christmas present for the bosses at Bell Labs as it was demonstrated just before the the festive season. Find out more in my YouTube short video: youtube.com/shorts/D9olB...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 14/01/2026

'Skill Up for 2026' with My Amazing Value Technical Ebook Bundle. The bundle includes Guides to Operational Amplifiers; Superhet Radio, and Multimeters. These three popular ebooks are now offered with a saving of ~20%. Don't mss out: electronics-notes-shop.fourthwall.com/collections/...

electronics-notes-shop.fourthwall.com

All Products | Electronics-Notes

The official All Products collection for Electronics-Notes. Shop products like: , Basics of Inductance Crib Sheet, and more.

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 13/01/2026

RESISTORS 101: the Mysteries Unveiled Check out all you need to know about resistors in electronics in my latest video. Watch now: youtu.be/ERce1gSIKmk #resistors #resistors101 #resistorbasics #electronics #electroniccomponents

RESISTORS 101: the Mysteries Unveiled

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 03/01/2026

How the Vacuum Tube Created Modern Electronics A very brief introduction to how the vacuum tube / thermionic valve founded what we call electronics today. Watch now: youtube.com/shorts/SnZAs... #vacuumtube #thermionicvalve #vintageradio #techhistory #historyoftechnology #electronics

Electronics Notes by Ian Poole @elecnotes.bsky.social · 01/01/2026

Why You NEED An Emitter Follower Check out my video now: youtu.be/fSki6td8L4c #electronics #circuitdesign #emitterfollower

Electronics Notes by Ian Poole @elecnotes.bsky.social · 28/12/2025

Brilliant Morse Code Coffee Mug Featuring every letter of the alphabet clearly displayed with its Morse code equivalent, it's perfect for showing off your passion for radio and communication. Buy yours now: electronics-notes-shop.fourthwall.com/en-gbp/produ... #merch #coffeemug #morsecode

Electronics Notes by Ian Poole @elecnotes.bsky.social · 15/12/2025

A Concise Guide to RF Attenuators and Their Design I've just launched the first of my 'Concise Guides.' At 5k words it looks at RF attenuators - the constant impedance Pi and T attenuators. Buy it now or check out more details: electronics-notes-shop.fourthwall.com/products/a-c...

electronics-notes-shop.fourthwall.com

A Concise Guide to RF Attenuators and Their Design

This PDF download covers the basic aspects of constant impedance Pi and T RF attenuators and their design. RF attenuators are used in many areas of electronics and in particular within RF design where...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 13/12/2025

Check out my ‘Guide to Superhet Radio Technology’ This book covers all the basic aspects of the superhet radio. To buy the book or find out more details: electronics-notes-shop.fourthwall.com/products/a-g...

electronics-notes-shop.fourthwall.com

A Guide to Superhet Radio Technology

This book covers all the basic aspects of the superhet radio. The aim was to provide all the essential elements of the superheterodyne radio in one volume, explaining the background, the basic concept...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 09/12/2025

Are SILICON CARBIDE Schottky Diodes Really So Great? Check out my video to find out what SiC Schottky diodes and and what their advantages really are. Watch my vide now: youtu.be/RWVpvi2tlcA #SiC #Siliconcarbide #Scottky #diodes #electrponiccomponents

Why are Silicon CARBIDE Schottky diodes so great?

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 05/12/2025

Why Metal Film Resistors Have Inductance In this video I explain why these resistors have inductance and where they can be used. Check out the video now: youtu.be/XNyl0Pxas64 #resistors #inductance #metalfilm #electroniccomponents

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Electronics Notes by Ian Poole @elecnotes.bsky.social · 04/12/2025

Does the Beverage antenna have any uses these days, or is it obsolete? Find out more about the antenna, its advantages & if it has any uses today. Discover: www.electronics-notes.com/articles/ant... #antennas #hamradio #hamr #amateurradio

Electronics Notes by Ian Poole @elecnotes.bsky.social · 01/12/2025

Exploring Electrolytic Capacitors - all the essential information Understand the essentials of electrolytic capacitors, discover their benefits & understand how they can be used to provide high levels of capacitance with high reliability. More: www.electronics-notes.com/articles/ele...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 29/11/2025

Understanding Transistor Current Gain Notations 101: beta, hfe hFE Check out my video now: youtu.be/DcfExBrI8Cw

Electronics Notes by Ian Poole @elecnotes.bsky.social · 25/11/2025

Why the OC71 Transistor is a Big Deal This transistor was an iconic electronic component of the 1960s. Find out all about it in my video: youtube.com/shorts/AHCmo... #OC71 #transistor #vintageradio #electroniccomponents #techhistory #historyoftechnology

Electronics Notes by Ian Poole @elecnotes.bsky.social · 18/11/2025

1N5822 Schottky Diode I’ve just released the YouTube Short version of my 1N5822 video. In this short I provide some of the basic details of this popular diode. Check out the video now: youtube.com/shorts/AzRTi...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 11/11/2025

How to Clean Away Battery Corrosion and Get Gadgets Working Again In this video I show you how I cleaned up an old battery powered clock where the battery had leaked and brought it back to life. Check out the video now: youtu.be/JXIT_CWEmN8

Electronics Notes by Ian Poole @elecnotes.bsky.social · 09/11/2025

Understanding how the Superhet / Superheterodyne Radio Works Check out my video to gain a good understanding. Watch now: youtu.be/dk6DdG4vs4Y #superhet #superheterodyne #radio #amateurradio #hamradio #hamr

Electronics Notes by Ian Poole @elecnotes.bsky.social · 04/11/2025

CAPACITORS 101: the Mysteries Unravelled In my YouTube short I give a quick overview of capacitors and what they are. It’s a great introduction to find out what they are with a link to a longer form video. Check out my video now: youtube.com/shorts/UC_7g...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 13/10/2025

I've just launched a new vintage valve / vacuum tube T-shirt on my online shop. This truly unique T-shirt shows some vintage valves or vacuum tubes from the first half of the 20th century. Check out more details on my online shop: electronics-notes-shop.fourthwall.com/products/vin...

electronics-notes-shop.fourthwall.com

Vintage Tech Reigns Vacuum Tube / Valve T-Shirt

This truly unique T-shirt shows some vintage valves or vacuum tubes from the first half of the 20th century. You can show off your interest in technology with this T-shirt that has been designed using...

Electronics Notes by Ian Poole @elecnotes.bsky.social · 07/10/2025

Discover My Amazingly Useful Op-Amp Circuits Mouse Mat Check out this incredibly useful mouse mat from my online shop in this video. youtube.com/shorts/xAe2w...

Discover My Amazingly Useful Op-Amp Circuits Mouse Mat

YouTube video by ElectronicsNotes

Electronics Notes by Ian Poole @elecnotes.bsky.social · 30/09/2025

1N5822: An Amazing Schottky Diode You Must Discover In this video, I explore the properties, characteristics, and applications of the 1N5822 Schottky Diode, including its high current capacity, low forward voltage drop, and fast switching times. Watch now: youtu.be/SurpzglsZ78 #1N5822 #Schottky

1N5822: An Amazing Schottky Diode You Must Discover

YouTube video by ElectronicsNotes