Video – Belgaum HF Net reception

Building End Fed Half Wave antenna (EFHW) for 40M – 10M

DIY EFHW antenna for 40 m–10 m: a 10.1 m multiband end-fed wire with 34 µH loading coil and 49:1 UNUN matching for portable HF and limited-space stations

Microphone Pre-Compressor Circuit for SSB Transceivers

Clean, punchy audio is critical for effective SSB communication, especially when operating QRP or low-power HF transceivers. A microphone pre-compressor placed ahead of the transmitter’s audio input can significantly improve average modulation levels without introducing harsh distortion. The attached Microphone Pre-Compressor circuit is a practical, discrete-component design well suited for homebrew and experimental SSB rigs.

Half Loop Antenna for 80, 40, 20, and 15 Meter Ham Radio Bands

Can’t fit a full-sized 80-meter dipole in your backyard? Or maybe you’re tired of the high noise floor of a vertical? It’s time to look at the Half-Loop. This “open-loop” design provides a fantastic balance between the quiet reception of a loop and the simplicity of a wire antenna.

In this project, we explore a multiband Half-Loop configuration that covers everything from 80 meters down to 15 meters. We’ll discuss the radiation pattern, the importance of a good ground or counterpoise, and how to use a simple tuner to jump between bands. If you’re looking for a “stealthy” antenna that punches above its weight on the low bands, this build is for you. Let’s get that wire in the air!