50 MHz 4 and 7 elements Yagi Drawings
Just found this two old antenna drawings for a four and a seven elements yagi antenna by WB7PMP. Looks interesting plans but have not yet attempted to build them.
Category Archives: Equipment
Amateur radio equipment reviews. Based on my direct experience or taken from other sources
Double Bazooka Antenna
Buddipole vs Wire Dipole on 20m
160 Meter linear loaded Tee vertical doublet antenna
I decided to publish this website in order to pass on some insights about this antenna that I’ve garnered through extensive experimentation. A warning though, some of the combined design aspects of the antenna may be unique and unorthodox, a think out of the box antenna design. Note! I do not have a B.S. or
Cubical Quad Design
The frequency scaling formulas for Cubical Quad antennas are shown in this picture. Note that frequency is measured in Megahertz {MHz} and the total length of each element is measured in feet {ft}. The spacing of each element is the same and all directors are the same size. The gamma match uses a small air
Programming VHF/UHF Radios
The purpose of this article is to give you an idea of what you will need to do to set up a new radio for basic Simplex, Repeater, and Memory operation so that you will have an idea of what to look for and concentrate on in the instruction manual for your radio. Programming a
Discone Antenna for RTL SDR
I have been getting into software defined radio via RTLSDR and found the stock antennas woeful for reception and picked up a tonne of noise from my LCD and laptop – though it’s hardly surprising. So to improve the situation and spend as little as possible I decided to make a discone antenna. After some
Rotatable Dipoles
Ultra-portable 5ele 144MHz Pocket Portable Yagi
Please feel free to build or distribute the information on these antennas. G4DHF retain the copyright to the designs and ask that they are not manufactured for commercial gain. Introduction This is a design for a 5 element 2 Metre beam with a forward gain of 8dBD and a front to back ratio of over
40m 3 element Yagi
Dimensions of the 3 element Yagi antenna for 7 MHz 15m 7050KHz 20.59m 21.80m 19.18m 20m 7050KHz 20.68m 22.15m 19.38m 25m 7050KHz 20.82m 22.70m 19.49m 30m 7050KHz 20.85m 22.80m 19.60m