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100, 50, and 25 Years Ago in the July QST

June 26, 2020 By Dan KB6NU Leave a Comment

Here are some articles in the QST archives that I think you will find not only amusing, but useful.

July 1920

CW for the Amateur, Howard L. Stanley, 2FS. A fanciful look at the author’s experiments with vacuum tubes. This at a time when most amateurs were still using spark-gap transmitters.

July 1970

The Ultimate Transmatch, by Lew McCoy, W1ICP. This article was part of the “Beginner and Novice” series, published in QST in those days. These articles are still a wealth of information for hams, both new and old. This article describes why an antenna tuner might be desirable, and how to build one that will tune coax-fed antennas, balanced-line-fed antennas, and random wire antennas.

Also notable: Power Line Interference: Its Causes and Methods of Location, by Robert G. Hollowell, W4USQ.

July 1995

A Wideband 80-Meter Dipole, by Rudy Severns, N6LF. This antenna is a folded dipole with a “resonator wire” inserted between the two folded dipole elements. By lengthening or shortening the wire, you can tune the antenna so its feedpoint impedance is 450 Ω. Connect that to a 9:1 balun, and you get an impedance of 50 Ω. The author shows that his antenna has an SWR of 1.6:1 or less across the entire 80-meter/75-meter band.

Also notable: Amateur Radio on the World Wide Web, Part 2, by Steve Bible, N7HPR.

 

Related posts:

  1. 2016 Extra Class Study Guide: E9C – Wire and phased-array antennas
  2. 75, 50, and 25 Years Ago in QST: Antennas, humor and power supplies
  3. 25, 50, and 75 Years Ago in QST
  4. 75, 50, and 25 years ago in QST: a five-tube TX, a halo, and keys, keyers, and keyboards

Filed Under: Antennas, Building/Homebrew, EMI/RFI, On the Internet Tagged With: W1ICP

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