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Low Profile Amateur Radio -- Second edition. Now you can operate a ham radio station from almost anywhere! All the information you need to operate under restrictive situations and more.

US Amateur Radio Bands - ARRL Frequency Chart (11 x 17") -- Now Shipping! -- Full color, size 11 x 17 inches.

Getting Started with Ham Radio -- Get on the air now! A guide to your first Amateur Radio station.

FCC Rules and Regulations for the Amateur Radio Service -- FCC Part 97 Rules & Regulations

The ARRL Emergency Communication Library v. 1.0 -- CD-ROM. Informative documents and presentations on many aspects of emergency communication operating.

Feedback - August, 2003 QST

In the Integrated Timer experiment in "Hands-On Radio" (Jun 2003 QST, page 59), the actions of the set and reset functions of the flip-flop are reversed. Correctly stated, when the set input (trigger comparator output) changes from low to high, Q goes low. When reset (threshold comparator output) changes from low to high, Q goes high.--Dan Ferreira, N1BMA

In "The Protector" schematic (Jun 2003 QST, Figure 1, page 56), resistor R13 (10 k ) was omitted. It should be in series with pin 2 of U2A (LM358) after the junction of R11, R12 and C3.--Arnaldo Drummond, PY5AQ



Page last modified: 02:42 PM, 16 Jun 2003 ET
Page author: qst@arrl.org
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