Amateur radio projects
1. Start here
What's radio construction about and how to get started
Parts needed for electronics and radio construction
The four pieces of radio test equipment you really need
Building projects from the schematic diagram - A one transistor crystal oscillator
Introducing the Pixie Hack Challenge
2. LF/MF radio receiving projects
A simple crystal set (and Q multiplier)
More crystal sets and experiments
Novel crystal set requires no antenna, earth
Some simple transistor receivers for the AM broadcast band
Regenerative AM receiver
One valve regenerative receiver operates from 12 volts HT video 1 video 2
Converting an AM broadcast receiver to hear 160 metres
High quality AM through your FM stereo
LF to HF converter
3. HF radio receiving projects
3.5 MHz direct conversion
receiver
3.5 MHz superhet receiver
Experiments with ceramic resonator 7 MHz regenerative receivers
Experimenting with the BK1198 receiver IC (Digitech AR1458 conversion)
Simple FT8 and JS8 direct conversion receivers
Starting in simple software defined radio
Binaural and phasing SSB receiver experiments
Ring modulators and Dalek kits for voice scrambling, shifting and sideband inversion
Hear Amateurs on your shortwave radio (BFO)
Hear Amateurs on your FM
radio
Car radio tunes the
amateur bands
4. VHF/UHF radio receiving projects
Superregenerative receivers for the FM broadcast band
50 MHz to 146 MHz
converter
All bands at once portable AM receiver (video)
5. HF amateur morse transmitters and transceivers (including VFOs)
1000km range with a 3.5 MHz crystal oscillator module transmitter? (video)
Frequency agile 3.5 MHz CW transmitter
Review of and improvements to the Pixie QRP CW transceiver
A page of super simple 1 & 2 transistor 3.5 & 7 MHz CW transmitters
Your first radio transmitter you built yourself - no soldering (video)
Your first radio transmitter can now talk (video)
'Tiny Toy' 7 MHz CW transceiver (video)
'Bigger Toy' 7 MHz CW transceiver (video)
One Valve CW
transmitter
Two Valve CW
transmitter
Wide-swing variable crystal
oscillator
Tinkerings with DDS VFOs
6. HF amateur voice and digital mode transmitters and transceivers
7 MHz ceramic resonator CW transmitter - receiver (video)
Very simple 7 MHz AM transmitter using TL431 audio amplifier (video)
7 MHz frequency agile 2 transistor FM exciter (video)
Badly behaved 7 MHz frequency agile 4 transistor FM exciter (video)
7 MHz FT8/JS8 direct conversion DSB transceiver
Diodes as DSB transmitter finals (high level balanced modulator)
'Micro 40' 7 MHz DSB transceiver
'Beach 40' 7 MHz DSB transceiver
Getting simple DSB transceivers to talk to one another (video)
'Knobless Wonder' single channel 7 MHz SSB transceiver
Tips and tricks for the Bitx SSB transceiver
Tips and tricks for the uBitx SSB transceiver
Phasing SSB experiments
Convert old 27 MHz CB and marine transceivers to 28 MHz
7. Low power educational voice and video transmitters
Very low power MF broadcast 'AM' transmitter with 2 transistors (video)
Low power MF broadcast FM transmitter with 3 transistors (video)
Micropower FM broadcast transmitter with pins and wood (video)
Experiments with low power 27 MHz and VHF transmitters
Experiments with low power UHF transmitter modules
Tests with low power video transmitter circuits
8. Transmitter and receiver accessories
Quick Android - transceiver interface cable for digital modes (video)
Glass CW audio filter (video)
Utility discrete transistor audio amplifier
Signal strength meter uses LM386 IC (video)
Automatic CW CQ caller using an Arduino (video)
Switchable 3.5 and 7 MHz QRP low pass filter (video)
Antenna couplers galore!
Audible antenna coupler adjustment indicator
RF actuated transmit indicator light for QRP rigs (video)
RF actuated CW monitor
A two-way Morse practice set
Build a simple Morse keyer in 10 minutes (video)
Morse adaptor for your VHF/UHF FM rig
1A variable regulated power
supply
An electronic stupidity meter (video)
9. Test equipment projects
Handheld transmitter and range testers
QRP power meter
Tweak your RF power meter - here's how (video)
LED voltage indicator for under a dollar (video)
Simple test equipment to build
Measure UHF frequencies with wood, wire and nails (video)
Measure inductance with just two transistors (video)
Dip oscillator for HF
3 - 12 MHz Signal generator
CMOS IC audio
oscillator
Dual tone audio
oscillator
10. Further information
