40m vertical on 20m. KC4 is designed for seamless multi-band operation. It uses a 3/8‑wavelength vertical radiator with top loading to achieve higher efficiency from a short self-supporting antenna. HAM RADIO DUAL BAND 20m/40m Vertical Antenna You Can Build. 5 Here is a simple antenna you can make from wire that covers the two bands 20m and 40m. For Concrete Pump Truck Used Isuzu Chassis Diesel-Powered 40m Vertical/50m Horizontal Reach 20M/H 1 Year Warranty The vertical part, however, is constantly affected by gravity, and so it will increase in height and then decrease, accelerating due to gravity. For Concrete Pump Truck Used Isuzu Chassis Diesel-Powered 40m Vertical/50m Horizontal Reach 20M/H 1 Year Warranty The SS34+ Vertical VHF HF Antenna is a 2-40 Meter 304 stainless steel telescopic whip with 17-sections that extends to 34. KN4WTT General. We also situated the antennas as far apart as possible. Quarter-Wave Vertical Antenna Length Calculator A quarter-wavelength antenna is easy and inexpensive to build and can be an effective antenna with a low angle of radiation (that is, power is radiated out, not up). 5 feet and collapses to approximately 29 inches. Once set up, you can effortlessly switch between these bands without the need for any adjustments. 5M 4-band base station vertical antenna is designed for use with an HF transceiver. 1800 utc on 40m and potentially 20m after with some ssb. Jul 9, 2018 · The 20m configuration is a true quarter-wave vertical; one of the toroids is switched in series for 30m, and both are placed in series for 40m. It has gain and wave angle comparable to a full-sized 1⁄4λ ground plane antenna with radials By John Portune W6NBC wanted high efficiency 40 Meter antenna with low-angle radiation. KC4 is a 4-band resonant vertical antenna for base station use. Ladder Line Dual Band Vertical with Zepp Feeders for 40m 20m, Antennas for Ham Radio. This item is listed as new and ships with free shipping. Ultimately, not a complicated setup. This system allows the vertical element to operate on multiple bands by treating the feedline as part of the radiating system, often requiring a balanced antenna tuner at the shack for optimal performance. Page 1 of 9 April 2017 W1DYJ ~ 40M Vertical A Homebrew 40M Vertical with Elevated Radials A Little Ham History Building, testing, using, and rebuildingantennas has always been one of my favored ham activities since shortly after I was licensed in 1962 as novice KN1VFX in southern Connecticut. Peter G3OJV gives full details. The Xiegu VG4 7. The piece highlights challenges, SWR tuning, portability, and A dual-band vertical antenna for the 40-meter and 20-meter bands, fed with parallel-wire (Zepp) feeders. 73 de VE6JTW Robert Chimel 1 reaction Any advice for improving HF dipole antenna performance? Jeremy Gaidjiergis HAM RADIO 2y · Public Hey guys, New to his group. How to Use a Coil Antenna for Portable HF Ham Radio Building a 10-20-40 meter vertical antenna with hardware store components High Performance 40 Meters Vertical Without Radials This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. Explore 42 curated links about 40 meter Vertical Antennas, featuring resources like Slink-ette antenna, Shortened 40 meter Vertical for POTA SOTA, Vertical antenna for 40 and 80m. The choice of vertical for 20m and horizontal for 40m wasn't an accident – I thought that having different polarisation might help with interference issues. Feb 21, 2026 · This article documents the author's journey in building, modifying, and testing a DIY short vertical antenna for 40, 30, and 20 meters, with potential 80m capability. Jul 9, 2018 · The 20m configuration is a true quarter-wave vertical; one of the toroids is switched in series for 30m, and both are placed in series for 40m. The formula for calculating the approximate length of a quarter-wave vertical antenna is: Quarter-wavelength in feet: 234 / frequency in MHz Quater-wavelength in meters: 71. . Initially inspired by Parks On The Air (POTA), the author explores pedestrian mobile operation and details various experiments to enhance antenna performance. I just built a dipole 72' in length connected to a 1:1 balun and connected to a ICOM 737a. The equation for the distance traveled by a projectile being affected by gravity is sin (2θ)v2/g, where θ is the angle, v is the initial velocity and g is acceleration due to gravity. grkdhf leiye bhpma focz zlvrpxkyf lpznqm amljp tpokjr nwuhpposd gncgss