clip art

2-Element-Yagis for HF  ^{updated  pop} - 2-Element parasitic Yagis for the Shortwave-Bands 10-12-15-17-20-30m. The antennas are feeded with the DK7ZB-match. A quarter-wave choke of coax is grounded at the socket.

The 2-Element-HB9CV-Beam  ^updated - The HB9CV-Beam is a 2-Element-Yagi with two driven elements and was introduced by Rudolf Baumgartner, HB9CV in the 1950ies. The Beam is a coax-feeded version of the ZL-Special Construction by DK7ZB for 2m, 6m and 10m

40-80 Half-Extended Double Zepp Antenna - A dual-bander for 80M and 40m. An Extended Double Zepp (EDZ) is a 5/4 wavelength center-fed dipole. This article will introduce the Half-Extended Double Zepp (HEDZ) which has characteristics that a lot of amateur radio operators should find quite interesting

6M Square Copper Dipole - Here is the parts list and dim. sheet for a 6m Square Copper Dipole, made from copper water pipe

A Full Wave Loop for 80 - 10 Metres - VE3HCR article of a home made loop antenna for 80 meters band

Common mode chokes - Excellent article on limiting noise using chockes by Chuck Counselman, W1HIS

Small magnetic receiving loops - Article about magnetic loops, construction notes and diagrams

NVIS - What it is and how to use it - Article on NVIS antennas By Patricia Gibbons - WA6UBE

K-FACTOR Table & Chart - Determine the K-Factor used as a multiplier when constructing half-wave antennas.

Key to Successful Tower Installations - PPT file by KE1IH on Tower installation

WB6WUW Amature Radio Tower Installation - Wb6wuw's pictorial guide to the erection of free-standing towers starting with excavation and ending with antenna installation

A *balanced* balanced antenna tuner  ^pop - The published version of this article appeared in the February 1990 issue of QST Magazine

ARRL Access to Amateur Radio for the Disabled - Articles for the sight impaired

Amateur Radio Licencing in India - Beginners guide and introduction to get started in ham radio if you live in India

Scanner Chile - Scanner Chile is a System online where you can listen to the Departments of Firemen of the Metropolitan Region Chile

YLRADIO Video clips - xperience 3 YLs having a 2 Meter QSO

Earth-Moon-Earth Photo Pages - by JH1KRC

A1PARTS - Canada's Largest Electronic Surplus Store

WorkedGrids - Ham Log Mapping software freeware for Windows, displays a map showing the amateur radio grid squares contacted and logged in using a third-party logging program by: Bertrand Zauhar, VE2ZAZ

AG6K Richard L. Measures - Articles and original manuscripts on RF power amplifiers

SB220 SB221 arcing problems improvements mods - This article explores the claim an amplifier might arc from a parasitic oscillation, damaging capacitors, bandswitches, or other components.

Adding 160M to HF amplifiers - updated original manuscript, article published in January 1989 QST by Richard L. Measures, AG6K, April 1988

Base-Station RF Power-Amplifier Biasing - Power amplifiers used in base stations require biasing for proper RF performance. This article explains the two classes of biasing that are prevalent in the RF industry, analyzes their characteristics, and shows implementations with existing ICs.

Filters and Ferrites in EMC - This article is about the characteristics and use of various filters and ferrites for solving amateur radio electromagnetic compatibility problems involving breakthrough of amateur signals into domestic equipment such as television sets, video recorders stereo sytems etc.

50MHz-Transverter 10m/6m from DK7ZB - This transverter was built in 1994, a discription in three parts (german language) for DOWNLOAD as PDF-files. Circuit, printed-boards and layouts in the files