Compact multiband HF dipole covering 10–80 m using symmetrical loading coils and coax matching section. Single-wire antenna for small spaces enabling 80, 40, 20, 15, 11, and 10 m operation with an antenna tuner.
3 x 5/8 Collinear antenna for 435 MHz UHF Band
High-gain 435 MHz UHF collinear antenna using three 5/8-wave vertical sections with inductive phasing. Provides ~6 dB omnidirectional gain and low-angle radiation for repeater, base, and long-range 70 cm band operation.
VHF Collinear J-Pole : The DIY Super J-Pole Antenna
Build a VHF Super J-Pole (collinear J-pole) antenna by stacking two half-wave elements with a phasing stub for ~3 dB gain over a standard J-pole. Omnidirectional, low-angle radiation vertical ideal for 2 m repeaters and long-range VHF communication
Housing the LARCSet: A Community-Designed 3D-Printed Enclosure
Ready to move your LARCSet off the workbench? Discover this community-driven 3D-printed enclosure project featuring STL files from Peter Marks and builds by VE3WMB.
20–40–80 Meter Loaded Multiband HF Dipole Antenna
Operating on 80m, 40m, and 20m from a small backyard is no longer a challenge. Learn how to build a compact, loaded multiband HF dipole that uses precision-placed coils instead of traps. This high-efficiency design offers resonant performance on three major bands using a single 1:1 balun
NanoVNA Test Jig: A Practical Guide for Accurate RF Measurements
Enter the NanoVNA Test jig Kit, a simple yet powerful “sea of holes” that transforms your VNA from an antenna analyzer into a full-scale laboratory tool for component characterization and RF circuit prototyping.
4:1 UN-UN Transformer for End-Fed Antennas
Build a 4:1 un-un impedance transformer to match end-fed wire antennas to 50 Ω coax. Ideal for long-wire, vertical, and off-center-fed antennas, improving SWR and RF transfer in multiband HF installations.
9:1 UN-UN Long Wire Transformer for HF Antennas
This article explains the construction, operation, and real-world usage of a 9:1 impedance transformer (UN-UN) for long wire and random wire antennas, making it ideal for SWL listeners and amateur radio operators.
5/4 Wave VHF Antenna for 145 MHz Using 450-Ohm Ladder Line
Build a 5/4-wave VHF antenna for 145 MHz using 450 Ω ladder line and a choke feed. Shows how to mount, feed, and match this high-gain vertical for FM, repeater, and simplex operations on the 2 m band
3-Element Yagi antenna for 70cm UHF band
The 3-Element Yagi antenna is a fantastic project for any radio amateur looking for a reliable, high-gain directional antenna that’s surprisingly straightforward to build.