4 meter

855 links - and 11 categories

KE4UYP Linear loaded vertical antenna - This is a vertically and horizontally polarized antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss for 80 or 160 meters
[ Hits: 13797 | Votes: 18 | Rating: 6.71 ]

2 Meter 10 Element Quagi Antenna - This antenna was designed by N6JSX Kuby for Transmitter hiding. Fitting the requirements of directionality, high gain, and portability. This antenna was derived from the ARRL Handbook information on Quagi's and Yagi's; in the absence of two meter Quagi information, UHF Quagi dimensions were scaled into 146 MHz use.
[ Hits: 15656 | Votes: 32 | Rating: 7.06 ]
Quagi and Yagi on 2 Meters - Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL
[ Hits: 4163 | Votes: 4 | Rating: 3.25 ]
Build a 2 Meter 5/4 Wave Antenna ^pop - This antenna is unique in that it is enclosed entirely in 3/4" PVC
[ Hits: 37158 | Votes: 24 | Rating: 5.91 ]

K4TX Delta Loop for 40 Meters - 40 Meter 2 Element Parasitic Delta Loop wire antenna with pictures of delta loop assembling
[ Hits: 7081 | Votes: 13 | Rating: 7.54 ]

Shorty Forty Antenna - Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.
[ Hits: 12445 | Votes: 8 | Rating: 7.74 ]

W7AV 40 Meter Half Square - These antennas offer big gun DX performance on the low bands, yet they are surprisingly simple to build. Try one- you will like it!
[ Hits: 4048 | Votes: 4 | Rating: 6.25 ]
40 M. triangular full wave vertical loop - A 40 meters band full wave antenna project plan with model, adding the Missing Leg to the Inverted-L Antenna
[ Hits: 13291 | Votes: 11 | Rating: 7.08 ]

Six Meter Wavelength Band Antennas - Why 6 meter hams design the best antennas
[ Hits: 2673 | Votes: 4 | Rating: 8.25 ]

K5UA 40 meter Phased Array - The intent of this site to share information about the design of a 40 meter horizontal phased array antenna.
[ Hits: 3415 | Votes: 5 | Rating: 7 ]

W1CG Low Power Balun Kit - Contruction manual to build a 4:1 balun, it has good performance from 160 through 10 meters.
[ Hits: 4373 | Votes: 4 | Rating: 7 ]

Installation of a Utility Pole - There are many ways to support an amateur radio antenna. Installatio of a utility pole will provide an antenna height of approximately 13 meters (40 feet) and will require no guy wires.
[ Hits: 6495 | Votes: 9 | Rating: 7.56 ]

A 5 band log periodic dipole array - Modified version of the Telerana antenna which was orginially featured in the July 1979 issue of QST. The array is suspended within a framework made of fiberglass poles emanating from a central hub with the ends tied together with light weight rope around the perimeter. 10-15-20-30-40 meter band coverage
[ Hits: 10004 | Votes: 12 | Rating: 6.59 ]

Loop Antenna Design - Full-wave loops are very popular antennas. They are especially useful on 80 and 40 meters where they perform well at modest heights
[ Hits: 2295 | Votes: 1 | Rating: 10 ]

LU9DPD Windom dipole - A multiband windom dipole antenna for 80 40 20 10 meters, feeded with a home made 4:1 balun, in spanish.
[ Hits: 5342 | Votes: 5 | Rating: 6 ]

IZ1GJH/B 10 meter beacon - Active on 28.321,47 MHz in CW and Qrss3
[ Hits: 295 | Votes: 0 | Rating: 0 ]

ZeroFive Antennas - Vertical antennas for all HF bands, expecially 80 40 20 meters bands
[ Hits: 7083 | Votes: 40 | Rating: 9.24 ]

DL5DBM 1KW amplifier for 144 Mhz - Pictures and circuit diagramm to build this power amplifier for 2 meters
[ Hits: 3389 | Votes: 2 | Rating: 10 ]

5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.
[ Hits: 8445 | Votes: 7 | Rating: 5.29 ]

HF to 2 meters transverter - F5RDH project of a transverter, that can receive input in HF and convert output to 144 Mhz in french
[ Hits: 2747 | Votes: 3 | Rating: 1 ]