Archive for the 'antennas' Category


The Ultimate Stealth Antenna?

From the 2010-01-26 issue of NIST Tech Beat:
Engineered Metamaterials Enable Remarkably Small Antennas

This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the “Z element” inside the square that acts as a metamaterial, greatly boosting the signal sent [...]

Stuart Gets on the Air

After several months, we finally got Stuart, KD8LWR, on HF from his home. The first hurdle was deciding on what antenna to put up. This choice was complicated by two factors:

Stuart’s family lives in a relatively new subdivision carved out from a farm field, with absolutely no trees to hang an antenna from.
The homeowner’s association [...]

Sad News…and a Reminder

Sad news today from the ARRL website:

Three People Killed While Erecting Ham Antenna
At approximately 8:40 PM on Monday, October 12, a man, woman and their 15 year old son were killed while trying to erect a 50 foot vertical antenna at the home of the man’s mother, Barbara Tenn, KJ4KFF, in Palm Bay, Florida. The [...]

Anyone Got a T-2?

Thirty or more years ago, I bought a random-wire tuner from a company called SST Electronics. I never did get it to work right back then, but a couple of years ago, I dug it out of the desk drawer and got it to tune a random wire on 80m. (See “The W3EDP Antenna” for [...]

More Sweet Tweets

Here are some more links to interesting Web pages I found by Twittering:

N3OX’s Remote Tuner Control. N3OX has added some servo motors and controls to a manual antenna tuner so that he can move it closer to the antenna, but still control it from inside the shack. Very inexpensive solution.
Band Plans for 900 MHz and [...]

Time for Antenna Work Nearly Over

From K8JE’s Weaver’s Words for April 29, 2009:
+++ Time for Antenna Work is nearly Over +++
It is my unfortunate duty to remind everyone the time to install and
repair antennas has nearly passed for our part of the world. The next
opportunity to ensure the value of this work will not come again until
early winter.
The Law [...]

Geronimo!

Two quick tips:

Parachute cord. A couple of subscribers to the qrp-l.org mailing list suggested the use of surplus parachute cord to suspend wire antennas. Dale, WC7S, says, “they stretch and allow for icing and frosting.” You can get a 1000-ft. spool for $60.
Cheap electrolytics. While working Harry, K4IBZ, I looked him up on QRZ.Com and [...]

Antenna Problem

Lou, W0IT, sent a link to this video to his brother Ralph, AA8RK, who passed it along to me. It’s a 10 Mbyte download, but worth the wait:

It shows a microwave antenna chock full of acorns, but this description doesn’t do the video justice. Click on the photo to download it. Really.
What do we learn [...]

More on the Random Wire Antenna

On the HamRadioHelpGroup, someone mentioned that he was interested in playing around with random wire antennas and asked for a recommendation for an “inexpensive manual antenna tuner that will work for experimentation.” Since he was experimenting anyway, I wanted to suggest that he build his own and then did a Google search for “random wire [...]

Antennas by the few, the proud, the Marines

Jim, K8ELR sent me a link to the United States Marine Corps Field Antenna Handbook, MCRP 6-22D. I thought that I’d covered this before, but couldn’t find it by doing a search. This manual covers antennas and propagation in a very straightforward way, and you can’t beat the price (FREE!)
Here’s what the manual has to [...]