70 MHz Antenna Projects
Amateur radio antenna designs for 70 MHz band
The 4-meter band, at 70 MHz, offers unique propagation characteristics for amateur radio operators, bridging the gap between the 6-meter and 2-meter bands. Hams often build custom antennas for 70 MHz to maximize their station's performance for local QSOs, DX, and even satellite operation. Many antenna projects focus on optimizing gain and directivity for this specific frequency, which is available in many IARU Region 1 countries.
This category provides numerous antenna designs for the 4-meter band, including Yagi antennas like the DK7ZB and YU7EF designs, known for their gain and front-to-back ratio. Operators can also find plans for compact antennas such as Moxon rectangles, Delta Loops, and Halo antennas, which are suitable for portable operations or limited space. Additionally, there are projects for multi-band antennas that cover 70 MHz alongside 50 MHz or 144 MHz, allowing hams to operate on several VHF bands with a single antenna system.
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A portable 4 elements yagi antenna for 70 MHz by yu7ef -
This 4m Slim Jim Antenna is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. An SWR of 1:1 is obtainable across the 4m ham radio FM band with a simple adjustment. -
OZ1BXM 70 MHz horizontal dipole antenna -
This resource details the construction of a 70 MHz Big Wheel antenna, including mechanical dimensions, a bill of materials, and contact information for OE5MPL a -
This article describes the construction of a Moxon rectangle antenna for the 70MHz (4-meter) amateur radio band. This compact two-element beam design features folded element ends, reducing its width to approximately 75% of a half-wavelength. The antenna was built using enamelled copper wire stretched over a lightweight fiberglass kite spar frame, with a direct coaxial cable feed connection. Initial testing showed a VSWR of around 1.3 with distinct nulls at 90 degrees when horizontally mounted. The author later tested vertical polarization and suggested that the antenna's compact size might allow for indoor loft installation. -
A delta loop antenna for the 4 meter band by GW7AAV -
Various Yagi antennas for 70 Mhz band -
Details the construction of a portable 7-element DK7ZB Yagi antenna for the 4-meter band (70 MHz), adapted from a 2m CUE DEE Yagi boom. -
5-element antenna, with which G0JJL has worked lots of EU crossband, and won the RSGB Christmas Cumulatives 70MHz section twice in a row. -
Easy to setup dipole antenna for 4 meters band by Tony Hawker G4CJZ -
Comparison of 50 and 70 Mhz antennas, commercial and home made projects -
Descriptions for 144-MHz- , 70 MHz- and 50-MHz-Reflector-Hentennas -
PA5DD version of the dual band yagi antenna for 50 and 70 Mhz -
This document details the design and construction of a Vinecom 6N4 dual-band Yagi antenna for the 50MHz (6-meter) and 70MHz (4-meter) amateur radio bands. The antenna features 9 total elements (4 elements for 50MHz, 5 elements for 70MHz) on a 4.236-meter aluminum boom. Computer simulations using MMANA software predict 7.21 dBd gain on both bands with front-to-back ratios of 16.01dB (6m) and 15.37dB (4m). The design uses 12.7mm diameter elements mounted on a 32mm square boom, weighing 5.7kg total. Practical measurements with an MFJ-269 analyzer confirmed good SWR performance across both bands after element length adjustments. -
Homebrew VHF Yagi 50MHz 144MHz 432MHz 1296MHz 2320MHz 6M 2M 70CM 23CM 13CM Yagis -
Halo antenna for 4 meters band with dimensions, pictures and assembling instructions -
Developed by Japanese 6 Meter Hams in the 1970's can be designed and built for almost any band -
70 MHz jpole half wave antenna by G7OGQ and G8CVF -
The Quadlong antenna for the six meter band. This antenna feature a total gain of 6,4 dBd, F/B 21 dB and is also available in 70MHz version. Includes detailed pictures and plot diagrams. -
Realization of the YU7EF 6m(6elm) and 4m(7elm) duo band antenna on a 6m boom by OZ1DJJ -
The original project of a dual band yagi antenna for 50 and 70 mhz, published on dubus 2/2007 by YU7EF -
This project details three variants of a vertical half-wave antenna design for the 4-meter (70MHz) amateur radio band. The antennas use end-feeding with a parallel-tuned circuit for impedance matching to 50-ohm coaxial cable. The first variant uses suspended flexible wire for portable use, the second employs a fiberglass rod with internal wire for permanent outdoor installation, and the third utilizes aluminum tent poles for quick mobile deployment. Despite the narrow bandwidth of the matching circuit, this suits the narrow 4m FM allocation well. The design offers an effective omnidirectional radiation pattern and can be constructed with readily available materials. -
Triband DK7ZB VHF Yagi antenna for 6 m, 4 m and 2 m with a single feedpoint -
A 5 elements homemade DK7ZB yagi antenna for 4 meters band based on a 50MHz TONNA -
Build a 7 Element 4M (70MHz) Beam By Paul M1CCZ -
A Yagi-Mag antenna for the 4 meters band with NEC and MMANA files plans and pictures -
Discover the success story of creating a 4-meter Delta Loop antenna, ideal for improving radio communication. This horizontally polarized antenna offers efficient performance when mounted at VHF heights, catering to both HF and VHF characteristics. A simple, DIY project suitable for portable setups, providing versatile options for radio enthusiasts. -
Pictures, design plan and description of a 5 element yagi antenna for the 4 meters band by 9A7PJT -
A homemade quarter wave ground plane anntenna for 4 meters band. -
This design has the following advantages low-cost components, Easy to set-up - nothing to adjust, no metalwork required, and only four soldered joints! -
A 4-meter coaxial dipole design for the 70 MHz band, featuring low-cost components and requiring only four soldered joints for construction. It's easy to set up -
This article describes the design and construction of a 4-meter band vertical sleeved dipole antenna, built to complement a newly acquired Yaesu FTDX10 transceiver. The simple yet effective antenna consists of modified coaxial cable housed in weather-resistant plastic conduit, featuring an integrated 8-turn choke coil. Despite common misidentification as an EFHW antenna, this design is actually a sleeved dipole that provides an excellent 50-ohm match across the band, achieving SWR values between 1:1 and 1.1:1. The project demonstrates an economical approach to entering the relatively quiet 4-meter band. -
Resonant Feedline Dipoles for 4m and 2m
