Regardless of whether you are operating at HF, VHF or UHF, the quality of your feed line is critical to your station. The feed line (also called the transmission line) is the RF power conduit between your radio and your antenna. All the energy you generate travels to …

Fat coaxial line, skinny cable, open-wire feeders or 300-ohm ribbon line — the correct choice can save the beginner a few dollars while helping to ensure maximum performance. By Doug WIFB here are a host of important factors to consider when planning the feed system for any antenna. The cost of the line should not be the first item to ponder.

Transmission line loss depends on the type of line and the operating frequency. Table 1 makes an interesting comparison of transmission line loss under both “matched” and high SWR conditions.

ARRL TIS Transmission Lines - articles and references about feed lines and SWR; ARRL TIS Antenna Tuners - information on impedance matching equipment; ARRL Guide to Antenna Tuners - publication

transmitter is connected to a feed line, which is then connected to the antenna. When you key the transmitter, it develops a radio fre-quency (RF) voltage on the transmission line input. The voltage travels down the feed line to the antenna at the other end and is …

With a balanced feed line, you can operate at almost any frequency you want without worrying about adjusting the antenna or losing power to the effects of SWR. That’s why this antenna design has been a favorite for so long. Not having to be concerned about loss due to SWR is a good thing! There is a problem, however: Modern

Arbitrary Transmission Line Calculator (for transmission lines and directional couplers) by Dr. David Kirkby (G8WRB), who works at the department of Medical Physics, University College London. Transmission Line for Windows (TLW) Software (updated June 2014 - …

Multiband dipoles offer a variety of size, feed-line, pattern, bandwidth, band-switching and other options. You’ll also find differences in complexity and efficiency.

SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation. One of the claims made in the manual for my SWR analyzer is that it can be used in a similar fashion to measure feedline attenuation. While that claim is technically true, I found that those measurements are only fea-

Feb 14, 2019 · It is my only "store bought" antenna and it works fairly well. I use it with a tuner in the shack on all bands, 10m through 40m. I've worked a lot of states and DX with that antenna on CW. I would think the 1:1 choke down on feed line would be a good idea.