Ultimate DIY Tri-Band 80M, 40M and 30M Trapped Delta Loop Antenna

Ultimate DIY Tri-Band 80M, 40M and 30M Trapped Delta Loop Antenna: Build a triband delta loop antenna for 80M, 40M & 30M. This trapped delta loop antenna guide covers traps, matching section & construction details

The OSJ Dual-Band Antenna: An Elegant Amateur Radio antenna in a Compact Package

The OSJ Dual-Band Antenna: An Elegant Amateur Radio antenna in a Compact Package: Build the high-performance OSJ Dual-Band antenna for VHF/UHF amateur radio. This guide provides dimensions, spacing requirements and construction tips

Multiband Dipole Antenna for 10–80 Meters

Multiband Dipole Antenna for 10–80 Meters: Multiband dipole antenna covering 10, 11, 15, 20, 40, and 80 meters using loading coils and a matching section. Compact HF antenna requiring external tuner.

3 x 5/8 Collinear antenna for 435 MHz UHF Band

3 x 5/8 Collinear antenna for 435 MHz UHF Band: High gain 435 MHz UHF collinear antenna design using three 5/8-wave radiators and inductive phasing. Ideal for UHF repeaters with 6 dB gain