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ARRL's Hands-On Radio Experiments -- Now Shipping! -- Over 60 basic electronics experiments from the pages of QST!

Power Supply Handbook -- Gain the knowledge and confidence you need to build and use power supplies. A must have for your bookshelf!

RF Components and Circuits -- New price $50.95, effective April, 16 2008. -- A comprehensive introduction to designing and understanding RF circuits.

ARRL's RF Amplifier Classics -- Turn dreams of constructing your first amp or next brick into reality!

Introduction to Radio Frequency Design -- Basic RF concepts (with some related analog subjects) for the amateur or engineer.

Feedback - June, 2004 QST

In the schematic in "A Data to PC Interface (or...New Life for an Old Mouse)" [May 2004, Figure 1, page 67], P3 (the DB9F connector) erroneously has two pin 4s. The lower one should be pin 5 (GND); it should go to pin 2 of U1. The upper pin (DTR) is shown correctly.



Page last modified: 02:44 PM, 03 May 2004 ET
Page author: qst@arrl.org
Copyright © 2004, American Radio Relay League, Inc. All Rights Reserved.