This summer I was looking for a cheap Android Tablet in order to replace a dead TomTom Go730 GPS navigator, that suddenly decided to dead and being close to go in holiday I decided to invest money into a more versatile device that could be used as a gps navigator but even in other ways….
Category: Articles
Here you can find articles I’ve cached, that are no more available in the net or are very rare to be found. Where possible credit will be given to authors.
80m 40m Inverted L Antennas
This week I’ve started investigating on Inverted L antennas for low bands (160 to 40). Expecially for restricted space scenarios, like mine. I found some interesting articles on the net, and a couple of PDF that I’ve embedded in an article dedicated to Inverted L Antenna for Low Bands
Calculate safety distance from your antenna
DL9KCE released a new version of his ICNIRPcalc software that allows you to calculate safety distances for many know amateur radio antennas with respect to ICNIRP limits. Calculations are done by considering many depending factors, like your Antenna characteristics, Band, Gain, Power Output, Coax Line, additional attenuation and many more. By variating any of these…
Double Extended Zepp Antenna
This antenna requires the use of Tuned Open wire feed line , ladder line , window line , etc. NOT Coax cable ! It is suggested a 450 – 600 ohm line. This antenna also requires the use of a matching network “Transmatch” at the transmitter end of the feed line. WH2T used a 75…
A Novice Multiband Vertical Antenna
Putting your first ham radio station together can be an expensive proposition. One way to cut costs is to keep the antenna simple. Here’s how WB1FSB shaved the price and provided four band operation. This old QST article illustrate how Marian Anderson WB1FSB setup a four band 80 40 15 and 10 meter band, ground-mounted …
An Easy VHF UHF Antenna
This is a project of an easy to build dual band (UHF and VHF) j-pole antenna done with a common TV twin lead and some coax cable. Original PDF document can be downloaded here
The 40 meter Stealth Vertical
 As published in antennex Dec. 2001 The 40 Meters band stealth vertical antenna by K7ZB “You’re 30dB over 9 here…” So goes the consistently fine signal reports received from around the USA and beyond – on 40 meters at the peak of Sun Spot Cycle 23. The most common antenna used in ham radio…
An effective 10-20m DX antenna for deed restricted lots…
Original article by K7ZB The simple 15′ vertical antenna shown mounted on the railing of our second floor deck has produced almost 200 countries worked around the world… VQ9’s in Chagos and 3B8’s on Mauritius in the Indian Ocean, TX0DX on Chesterfield Reef, VK0MM on Macquarie Island in the Antarctic region, BQ9P on Pratas Island…
A cheap J-Pole antenna for 50 Mhz
Need a general purpose antenna on “6 – 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 ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub. If…
Indoor antenna for 7 Mhz
I’m looking to setup a hidden / indoor antenna, and i’ve found a couple of interesting articles on hidden / stealth antennas This small antenna can allow hams which lack space to install an antenna for 40 meters. This project has been originally produced by F6CYV. I’m going to test this antenna in the coming weeks. I…