50MHz J-Pole Antennapop
- Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised antenna without the need for a groundplane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
6 Meter 5/8 Wave Vertical Antenna
- The G3JVL 6 Meter groundplane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.
Feeding an End-Fed Antennapop
- End-Fed antennas are NOT balanced systems; but neither are verticals, groundplanes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.
- The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a groundplane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.
A Modern Thermocouple Ammeter
- Thermocouple ammeters are very rare these days, but the job they were perfect for - measuring antenna currents - is still a modern requirement especially in respect to groundplane currents. By David A. Reid PA3HBB G0BZF
6m vertical antenna
- G3JVL Six meters groundplane vertical is a compact antenna that is ideal for portable operations on 50 Mhz
- Short guide to build your own groundplane antenna, includes radial measurements fro warc bands
Short radials for ground-plane antennas
- Think your elevated radials always have to be full size? N6LF lets you in on some great ideas to lessen the â€świngspanâ€ť of radials, especially near the beach.