Electronics Notes by Ian Poole
@elecnotes.bsky.social
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: https://www.electronics-notes.com
#electronics #RFdesign #antennas
I’ve had a fantastic career in electronics - now I’d like to help others into it.
Website: https://www.electronics-notes.com
#electronics #RFdesign #antennas
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
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
December 5, 2025 at 8:59 AM
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
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
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
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
December 4, 2025 at 12:09 AM
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
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
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...
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...
December 1, 2025 at 3:16 PM
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...
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...
Understanding Transistor Current Gain Notations 101: beta, hfe hFE
Check out my video now: youtu.be/DcfExBrI8Cw
Check out my video now: youtu.be/DcfExBrI8Cw
November 29, 2025 at 6:08 PM
Understanding Transistor Current Gain Notations 101: beta, hfe hFE
Check out my video now: youtu.be/DcfExBrI8Cw
Check out my video now: youtu.be/DcfExBrI8Cw
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
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
November 25, 2025 at 3:01 PM
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
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
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...
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...
November 18, 2025 at 12:13 PM
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...
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...
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
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
November 11, 2025 at 10:43 AM
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
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
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
Check out my video to gain a good understanding.
Watch now: youtu.be/dk6DdG4vs4Y
#superhet #superheterodyne #radio #amateurradio #hamradio #hamr
November 9, 2025 at 7:55 AM
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
Check out my video to gain a good understanding.
Watch now: youtu.be/dk6DdG4vs4Y
#superhet #superheterodyne #radio #amateurradio #hamradio #hamr
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...
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...
November 4, 2025 at 9:57 AM
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...
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...
Transistor Circuit Configurations Infographic: common base, collector & emitter
Check out this infographic now: www.electronics-notes.com/articles/sum...
#transistor #circuitdesign #commonemitter #emitterfollower, #commoncollector #commonbase #electroniccomponents
Check out this infographic now: www.electronics-notes.com/articles/sum...
#transistor #circuitdesign #commonemitter #emitterfollower, #commoncollector #commonbase #electroniccomponents
September 29, 2025 at 2:00 PM
Transistor Circuit Configurations Infographic: common base, collector & emitter
Check out this infographic now: www.electronics-notes.com/articles/sum...
#transistor #circuitdesign #commonemitter #emitterfollower, #commoncollector #commonbase #electroniccomponents
Check out this infographic now: www.electronics-notes.com/articles/sum...
#transistor #circuitdesign #commonemitter #emitterfollower, #commoncollector #commonbase #electroniccomponents
I'm delighted to say that my YouTube channel has just gone through the 55k subscribers barrier.
Check out my channel now: www.youtube.com/@Electronics...
#electroniccomponents #youtube #videos
Check out my channel now: www.youtube.com/@Electronics...
#electroniccomponents #youtube #videos
September 29, 2025 at 8:38 AM
I'm delighted to say that my YouTube channel has just gone through the 55k subscribers barrier.
Check out my channel now: www.youtube.com/@Electronics...
#electroniccomponents #youtube #videos
Check out my channel now: www.youtube.com/@Electronics...
#electroniccomponents #youtube #videos
The Early Effect in Bipolar Transistors: A 101 Overview
The Early effect in transistors is not often thought of, but it can have a major impact on bipolar transistor performance.
Discover more: www.electronics-notes.com/articles/ele...
#earlyeffect #transistors #electroniccomponents
The Early effect in transistors is not often thought of, but it can have a major impact on bipolar transistor performance.
Discover more: www.electronics-notes.com/articles/ele...
#earlyeffect #transistors #electroniccomponents
September 16, 2025 at 6:26 AM
The Early Effect in Bipolar Transistors: A 101 Overview
The Early effect in transistors is not often thought of, but it can have a major impact on bipolar transistor performance.
Discover more: www.electronics-notes.com/articles/ele...
#earlyeffect #transistors #electroniccomponents
The Early effect in transistors is not often thought of, but it can have a major impact on bipolar transistor performance.
Discover more: www.electronics-notes.com/articles/ele...
#earlyeffect #transistors #electroniccomponents
Gallium Nitride GaN FETs & HEMTs: what they are & how they work.
Did you know that GaN FETs use a 2D electron gas, 2DEG as the basis of their operation. Effectively the GaNFET is a HEMT.
Discover the full story: www.electronics-notes.com/articles/ele...
Did you know that GaN FETs use a 2D electron gas, 2DEG as the basis of their operation. Effectively the GaNFET is a HEMT.
Discover the full story: www.electronics-notes.com/articles/ele...
September 15, 2025 at 6:24 AM
Gallium Nitride GaN FETs & HEMTs: what they are & how they work.
Did you know that GaN FETs use a 2D electron gas, 2DEG as the basis of their operation. Effectively the GaNFET is a HEMT.
Discover the full story: www.electronics-notes.com/articles/ele...
Did you know that GaN FETs use a 2D electron gas, 2DEG as the basis of their operation. Effectively the GaNFET is a HEMT.
Discover the full story: www.electronics-notes.com/articles/ele...
Who Knows what a BARITT Diode is?
The BARITT diode Barrier Injection Transit Time diode is a device used for generating microwave signals from a single diode.
Find out more: www.electronics-notes.com/articles/ele...
#BARITT #diode #microwaves #microwavediode
The BARITT diode Barrier Injection Transit Time diode is a device used for generating microwave signals from a single diode.
Find out more: www.electronics-notes.com/articles/ele...
#BARITT #diode #microwaves #microwavediode
September 14, 2025 at 6:47 AM
Who Knows what a BARITT Diode is?
The BARITT diode Barrier Injection Transit Time diode is a device used for generating microwave signals from a single diode.
Find out more: www.electronics-notes.com/articles/ele...
#BARITT #diode #microwaves #microwavediode
The BARITT diode Barrier Injection Transit Time diode is a device used for generating microwave signals from a single diode.
Find out more: www.electronics-notes.com/articles/ele...
#BARITT #diode #microwaves #microwavediode
Op-amp Mugs Amplify the Potential of Your Coffee Break
I've launched a series of three coffee mugs with the essential op-amp circuits on them. Each mug has two circuits, one on each side.
Check out my video for more information: youtube.com/shorts/WzbWG...
I've launched a series of three coffee mugs with the essential op-amp circuits on them. Each mug has two circuits, one on each side.
Check out my video for more information: youtube.com/shorts/WzbWG...
September 9, 2025 at 10:36 AM
Op-amp Mugs Amplify the Potential of Your Coffee Break
I've launched a series of three coffee mugs with the essential op-amp circuits on them. Each mug has two circuits, one on each side.
Check out my video for more information: youtube.com/shorts/WzbWG...
I've launched a series of three coffee mugs with the essential op-amp circuits on them. Each mug has two circuits, one on each side.
Check out my video for more information: youtube.com/shorts/WzbWG...
What Makes IQD IQXC-240 Quartz Crystal Resonators So Great?
In this video I take a look at this amazing but very small quartz crystal resonator.
youtube.com/shorts/3Ulgl...
In this video I take a look at this amazing but very small quartz crystal resonator.
youtube.com/shorts/3Ulgl...
September 1, 2025 at 9:14 AM
What Makes IQD IQXC-240 Quartz Crystal Resonators So Great?
In this video I take a look at this amazing but very small quartz crystal resonator.
youtube.com/shorts/3Ulgl...
In this video I take a look at this amazing but very small quartz crystal resonator.
youtube.com/shorts/3Ulgl...
Stylish Vintage Valve / Vacuum Tube Coffee Mug
This stylish coffee mug features three vintage vacuum tubes or valves including an R-Type valve which was first introduced in 1916.
Buy one new from my online shop: electronics-notes-shop.fourthwall.com/products/vin...
This stylish coffee mug features three vintage vacuum tubes or valves including an R-Type valve which was first introduced in 1916.
Buy one new from my online shop: electronics-notes-shop.fourthwall.com/products/vin...
August 15, 2025 at 8:03 AM
Stylish Vintage Valve / Vacuum Tube Coffee Mug
This stylish coffee mug features three vintage vacuum tubes or valves including an R-Type valve which was first introduced in 1916.
Buy one new from my online shop: electronics-notes-shop.fourthwall.com/products/vin...
This stylish coffee mug features three vintage vacuum tubes or valves including an R-Type valve which was first introduced in 1916.
Buy one new from my online shop: electronics-notes-shop.fourthwall.com/products/vin...
Battery Types & Technologies: a primer
There are various different technologies for electrical batteries and cells both rechargeable and non-rechargeable and understanding how they work can enable them to be used more effectively.
Discover: www.electronics-notes.com/articles/ele...
There are various different technologies for electrical batteries and cells both rechargeable and non-rechargeable and understanding how they work can enable them to be used more effectively.
Discover: www.electronics-notes.com/articles/ele...
August 2, 2025 at 6:16 AM
Battery Types & Technologies: a primer
There are various different technologies for electrical batteries and cells both rechargeable and non-rechargeable and understanding how they work can enable them to be used more effectively.
Discover: www.electronics-notes.com/articles/ele...
There are various different technologies for electrical batteries and cells both rechargeable and non-rechargeable and understanding how they work can enable them to be used more effectively.
Discover: www.electronics-notes.com/articles/ele...
What is Bit Error Rate, BER
Bit Error Rate, BER is a key parameter for measuring the performance of a data wired or wireless data channel.
Discover: www.electronics-notes.com/articles/rad...
Bit Error Rate, BER is a key parameter for measuring the performance of a data wired or wireless data channel.
Discover: www.electronics-notes.com/articles/rad...
July 27, 2025 at 8:17 AM
What is Bit Error Rate, BER
Bit Error Rate, BER is a key parameter for measuring the performance of a data wired or wireless data channel.
Discover: www.electronics-notes.com/articles/rad...
Bit Error Rate, BER is a key parameter for measuring the performance of a data wired or wireless data channel.
Discover: www.electronics-notes.com/articles/rad...
Morse Code Coffee Mug
Bring some communication to your coffee time with this amazing Morse Code Coffee Mug.
The mug can show off your interest and passion, and it is sure to spark a conversation.
Buy one now: electronics-notes-shop.fourthwall.com/products/mor...
Bring some communication to your coffee time with this amazing Morse Code Coffee Mug.
The mug can show off your interest and passion, and it is sure to spark a conversation.
Buy one now: electronics-notes-shop.fourthwall.com/products/mor...
July 27, 2025 at 7:38 AM
Morse Code Coffee Mug
Bring some communication to your coffee time with this amazing Morse Code Coffee Mug.
The mug can show off your interest and passion, and it is sure to spark a conversation.
Buy one now: electronics-notes-shop.fourthwall.com/products/mor...
Bring some communication to your coffee time with this amazing Morse Code Coffee Mug.
The mug can show off your interest and passion, and it is sure to spark a conversation.
Buy one now: electronics-notes-shop.fourthwall.com/products/mor...
Rhombic Wire Antenna Explained
One of the antennas that have been used in the past and to which many radio amateurs aspire is the rhombic antenna.
Discover more: www.electronics-notes.com/articles/ant...
#antennas #rhombic #amateurradio #hamradio
One of the antennas that have been used in the past and to which many radio amateurs aspire is the rhombic antenna.
Discover more: www.electronics-notes.com/articles/ant...
#antennas #rhombic #amateurradio #hamradio
July 27, 2025 at 6:33 AM
Rhombic Wire Antenna Explained
One of the antennas that have been used in the past and to which many radio amateurs aspire is the rhombic antenna.
Discover more: www.electronics-notes.com/articles/ant...
#antennas #rhombic #amateurradio #hamradio
One of the antennas that have been used in the past and to which many radio amateurs aspire is the rhombic antenna.
Discover more: www.electronics-notes.com/articles/ant...
#antennas #rhombic #amateurradio #hamradio
Ohm's Law
Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.
More: www.electronics-notes.com/articles/bas...
Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.
More: www.electronics-notes.com/articles/bas...
July 23, 2025 at 8:04 AM
Ohm's Law
Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.
More: www.electronics-notes.com/articles/bas...
Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.
More: www.electronics-notes.com/articles/bas...
Britain's Secret WW2 Electronic Component Lifesaver
Second to the magnetron, this component was probably the most important electronic component that saved Britain in the face of attacks from the Nazi Luftwaffe.
Discover the complete story in my video: youtu.be/AKMH-BPtrCw
#Vacuumtube
Second to the magnetron, this component was probably the most important electronic component that saved Britain in the face of attacks from the Nazi Luftwaffe.
Discover the complete story in my video: youtu.be/AKMH-BPtrCw
#Vacuumtube
July 15, 2025 at 11:13 AM
Britain's Secret WW2 Electronic Component Lifesaver
Second to the magnetron, this component was probably the most important electronic component that saved Britain in the face of attacks from the Nazi Luftwaffe.
Discover the complete story in my video: youtu.be/AKMH-BPtrCw
#Vacuumtube
Second to the magnetron, this component was probably the most important electronic component that saved Britain in the face of attacks from the Nazi Luftwaffe.
Discover the complete story in my video: youtu.be/AKMH-BPtrCw
#Vacuumtube
Transistor & Diode Part Numbering Codes
There’s a surprising about the transistor performance that can be learned from many part numbers.
Discover more: www.electronics-notes.com/articles/ele...
#transistors #jedec #proelectron #electroniccomponents
There’s a surprising about the transistor performance that can be learned from many part numbers.
Discover more: www.electronics-notes.com/articles/ele...
#transistors #jedec #proelectron #electroniccomponents
July 15, 2025 at 5:50 AM
Transistor & Diode Part Numbering Codes
There’s a surprising about the transistor performance that can be learned from many part numbers.
Discover more: www.electronics-notes.com/articles/ele...
#transistors #jedec #proelectron #electroniccomponents
There’s a surprising about the transistor performance that can be learned from many part numbers.
Discover more: www.electronics-notes.com/articles/ele...
#transistors #jedec #proelectron #electroniccomponents
Sporadic E, Es Propagation
Sporadic E propagation is sporadic & unpredictable by nature, but it enables radio signals to travel over much greater distances & often at higher frequencies than would normally be possible via the ionosphere.
More: www.electronics-notes.com/articles/ant...
Sporadic E propagation is sporadic & unpredictable by nature, but it enables radio signals to travel over much greater distances & often at higher frequencies than would normally be possible via the ionosphere.
More: www.electronics-notes.com/articles/ant...
July 12, 2025 at 7:05 AM
Sporadic E, Es Propagation
Sporadic E propagation is sporadic & unpredictable by nature, but it enables radio signals to travel over much greater distances & often at higher frequencies than would normally be possible via the ionosphere.
More: www.electronics-notes.com/articles/ant...
Sporadic E propagation is sporadic & unpredictable by nature, but it enables radio signals to travel over much greater distances & often at higher frequencies than would normally be possible via the ionosphere.
More: www.electronics-notes.com/articles/ant...