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Basic Electronics Course and Kit -- The Basic Electronics Course and Kit is intended for those teachers and instructors that want a ready resource that they can adapt to their instruction of electronic fundamentals. The materials include a PowerPoint presentation and instructor's script. The course is designed around affordable components, prototyping board, and VOM and uses Understanding Basic Electronics as the associated reference (sold separately).

Parallax USB Oscilloscope -- This portable two-channel digital storage oscilloscope is a handy and affordable tool for both hobbyist and student!

The ARRL Instructor's Manual for Technician and General License Courses -- NOW designed for both Technician and General Class. Includes CD-ROM.

What's a Microcontroller? Parts Kit and Text -- Incorporates a variety of fun and engaging experiments using motion, light, and sound.

Boe-Bot Robot Kit -- The new USB Boe-Bot is a reprogrammable robot built on a high-quality brushed aluminum chassis.

March 2005 QST Feedback

Feedback

Clarification: In the May 1971 QST cover photo reproduced on page 50 of the January 2005 issue, the “ham” demonstrating how to use a 2 meter repeater is Dave DeMaw, W1CER. His father, longtime QST Technical Editor Doug DeMaw, who held W1CER at the time, provided the sports car.

Regarding my article, “Remote DC Power Through Your Coax” [Jul 2004, pp 35-37], please be aware that most rigs today do have dc continuity from the coax center conductor to ground. For that reason, a dc blocking capacitor is absolutely necessary to protect your transmitter. If you built the dc recovery circuitry into your remote tuner (or other device), make sure there is dc blocking should you power the remote device directly from its own dc source, as this recovery circuitry will put dc back on the coax center conductor.—Phil Salas, AD5X



Page last modified: 09:46 AM, 09 Feb 2005 ET
Page author: qst@arrl.org
Copyright © 2005, American Radio Relay League, Inc. All Rights Reserved.