Rothammels Antenna Book – Translated and revised from the 13th German edition
Rothammels Antenna Book For many years, radio amateurs have been using this reference book, which…
Antenna
Ebook
Antenna
DIY
Tools
1:49 UNUN using two stacked FT240-43 cores for endfed halfwave antenna
1:49 UNUN is a type of transformer that can be used to match an end…
Circuits
CW
DIY
QRP
Transmitter
Ten Minute QRP Transmitter
Build a functional "Ten-Minute" QRP Transmitter with this simple DIY guide. Featuring a minimal component…
Circuits
DIY
Transmitter
Circuits – Sovina2 40M Class E Transmitter
This is a Class E Transmitter designed for the 40-meter amateur radio band, capable of…
Circuits
CW
QRP
Transmitter
G4RAW 80M QRP TAG CW Transmitter
G4RAW 80M QRP CW Transmitter: The original version was built on tag strip, hence the…
Antenna
DIY
VK4FUQ Optimized sloper antenna for 3.5Mhz
VK4FUQ’s optimised sloper antenna for 3.5MHz. Radiator and counterpoise radial are both one-quarter-wave in length…
Antenna
DIY
Half Rhombic antenna with counterpoise
The inverted rhombic antenna boasts a distinctive half-rhombic configuration. Its directivity focuses toward the terminated…
audio
Circuits
Circuits – LM386 Audio oscillator
LM386 Audio oscillator This one is excellent application of widely used audio amplifier IC LM386.Its…
Antenna
Articles
DIY
Terminated End Fed Vee Antenna (TEFV)
Terminated End Fed V Antenna (TEFV) - It Is a travelling wave antenna, which has…
Circuits
DIY
Tools
Circuits – Simple Crystal Tester
Simple Crystal tester - The idea for this crystal tester circuit sprung out of the…