DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
Explore a detailed collection of antenna projects and DIY designs at vu3dxr.in. This tag features practical builds, tuning guides, and performance tests for various amateur radio antennas. From wire dipoles to specialized SDR antennas, discover step-by-step instructions to help you construct and optimize effective aerials for your radio station.
Limited on space but want to get on 40m? Learn how to build a high-performance, reduced-size 40m antenna using high-Q loading coils. This guide covers calculations, coil winding, and tuning techniques to fit a 20-meter band antenna into a compact 10-meter footprint.
Low on space but want to reach the 80m band? This technical guide walks you through building a shortened Inverted V antenna for 3.700 MHz. Using high-inductance loading coils, you can fit a full 80m radiator into a restricted urban footprint while maintaining a low SWR
Build the legendary G5RV multiband antenna with this comprehensive DIY guide. Discover the technical balance between the 102ft radiator and the critical matching section that allows for 80m–10m operation. Learn how to optimize your feedline and avoid common RFI “growing pains”
Unlock extreme bandwidth with the UR0GT Broadband Avia Antenna (RW4HVN Mod). This technical guide explores the unique geometry that allows for seamless performance across Airband, 2m Ham, and Marine VHF without a tuner. The ultimate wideband solution for VHF explorers and monitoring enthusiasts.
A simple and effective 2-meter ham band sleeve dipole antenna design using a ¼-wave whip and a ¼-wave aluminium sleeve over copper braid.
Looking for an effective HF antenna for a high-rise or apartment balcony? This practical guide from VU3DXR details the construction and performance of a Loaded Loop Antenna—a compact, high-efficiency solution designed specifically for radio amateurs facing severe space constraints.
Build the ZED dipole antenna for 2 m and 70 cm bands — a compact bent-element half-wave dipole with near-50 Ω feed, broadband VHF/UHF coverage, and simple DIY construction
The Faulkner FM Loop Antenna is a popular and highly effective design among FM radio enthusiasts and DXers worldwide. It provides excellent reception over the 87.5–108 MHz FM broadcast band and can be built easily using common materials. Despite its simple structure, it performs as well as many commercial indoor FM antennas
Quarter-wave COCO antenna design for 2 m band: stacked λ/4 coax elements with phase-reversing joins for compact high-gain VHF performance and easy DIY construction
Build a compact dual-band FBK sleeve antenna for VHF/UHF bands from coax cable. Simple, efficient, and ideal for portable ham radio use.