In addition to the web interface at http://www.hamqth.com/dxcluster.php there is also new DX cluster node OK2CQR-1, accessible from telnet hamqth.com 7300. It can be defined in your logging contesting in the following way: address: hamqth.com port: 7300 login: your_call_sign (ie. G3ABC) Congrats to Petr OK2CQR who created this very complex […]
Monthly Archives: May 2012
31 posts
This little utility for Linux (written by Petr, OK2CQR) is an easy to operate tool for maintenance of a database of QSL managers. It provides csv import, conversion to uppercase, sorting, dupe check and cleaning. There is also possible to add, edit or delete any record manually. This version works […]
a compact, directional receiving antenna by Gary Breed, K9AY first published in QST (ARRL), Newington, Sep 1997 Wish you had enough room for an effective low-band receiving antenna? You do! This four-direction system fits in a 30-foot circle! Low-band operators are always looking for ways to improve their hearing. As […]
While browsing my paper archives, I found two folded, together stapled paper sheets with almost unreadable pictures of a control box for the K9AY loop receiving antenna* (a note see below) and a preamp with filtered input which was unreadable at all, however the schematic recalls the already published K9AY […]
Here’s how you can make a low-cost, low-noise, 21-foot-square receiving antenna that’s certain to boost your DX ability. In his accompanying QST article (1), Brian Beezley, K6STI, brings to our attention the details of how an antenna can be designed to eliminate (or greatly reduce) power-line noise to aid low-band […]
Simplicity and performance combine to give birth to a compact antenna you’ll want to have! Noise can make a ham’s life miserable on any amateur band. As we approach the minimum of the sunspot cycle, many hams are discovering that noise can be particularly frustrating on the low bands. In […]
by Floyd Koontz, WA2WVL first published in QST (ARRL), February 1995 A New Design One fundamental of directive wire-antenna design is that two or more parallel wires carrying similar RF currents produce directivity regardless of the phase or amplitude of the currents, if the wires are separated significantly (greater than […]
By Floyd A. Koontz, WA2WVLFirst published in QST (ARRL), January 1996 You’ve seen the basic EWE, now you can have switchable, directional EWEs! Since the introduction of the EWE antenna in QST, many amateurs have improved their low-band receiving capability with a EWE. [1] In the correspondence I’ve received was […]
Established theory is timeless, but many amateurs do not have acces to the archives that contain clasical data of present-day interest. Medium frequency DXers should appreciate this update on an historical 1922 QST article. 1 By H. H. Beverage, ex W2BML* and Doug De Maw, W1FB** * silent key January […]
There are 2 versions of the Battle Creek Special shown - a wire version. which will work out first. The traps are made of coax cable as described by W1FB. The second version is a 'real' vertical make of tubes complete with a description of the traps... I hope to unsecret the mystery of the Battle Creek Special and the construction of it.
GENERAL
This antenna is designed for 40, 80 and 160 meters to complement a tri-band beam normally taken on DXpeditions for 10, 15 and 20 meters, so six bands can be worked with only two antennas.