Circuits – 40M tag QRP Transmitter
Here is another qrp cw transmitter pulled out from SPRAT back issues, which is simple…
Circuits
CW
DIY
Transmitter
Antenna
Antenna – Foldaway Loop antenna
This loop antenna is based on one published in one of back issues of sprat…
Antenna
DIY
Antenna – Rockloop HF Antenna for 10,15,20 metre ham bands
Rockloop HF antenna for 10,15,20 metre ham bands The Rockloop HF Antenna 's a tuned…
Circuits
CW
HF
QRP
Transmitter
Circuits – Pippin QRP Transmitter
This pippin QRP transmitter is basically a conventional colpitts type crystal oscillator with output taken…
Circuits
Power & Battery
Tools
Circuit – Battery Low Power Indicator
This is a clever Battery low power indicator circuit designed by G3AGX that provides a…
Circuits
CW
QRP
Transmitter
Circuits – 7 Mhz 5 Watts CW Transmitter
The above 7 Mhz 5 Watts CW Transmitter circuit was found in one of back…
Circuits
DIY
Circuit – FM Bandstop Filter for RTL SDR
FM Bandstop Filter for RTL SDR The given FM band stop filter is nothing more…
Circuits
DIY
Power & Battery
Tools
Circuits – Simple zener diode tester
Simple zener diode tester Ever found yourself with a handful of zener diodes, wondering if…
Articles
DIY
DIY Video
Videos
DIY – Making printed circuit boards
Making printed circuit boards There are many ways to produce your own printed circuit boards.…
radio
Reception
Videos
Video – Colombo International Radio Tamil service Inaugural day transmissions
[embed]https://youtu.be/D7MB7G6ze04[/embed] Colombo International Radio Tamil service - Inaugural day transmissions Frequency - 873khz Time -…