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Parallax USB Oscilloscope -- Now Shipping! -- 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 Shipping! -- NOW designed for both Technician and General Class. Includes CD-ROM.

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

Ham Radio...Planning for the Future 2000 -- Proceedings of The ARRL National Educational Workshop. September 2000.

The ARRL Instructor's Manual for Technician Class License Courses -- For use with The ARRL Ham Radio License Manual. Includes CD-ROM.

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
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