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ARRL Products: Circuit Design (More) Experimental Methods in RF Design -- Immerse yourself in the communications experience by building equipment that contributes to understanding basic concepts and circuits. ARRL's Vintage Radio -- Articles about the lure of vintage Amateur Radio gear. ARRL's Hands-On Radio Experiments -- 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! Hints & Kinks--17th edition -- Now including the popular Hands-On Radio column from QST Workbench.

The site of the Missouri State Convention [see August 2005 QST, page 86] has changed. The new site is the Ashland Optimist Complex in Ashland, Missouri, 13.5 miles south of Columbia on US 63. For details, see the Central Missouri Radio Association Web site.

The reference to military ARC-5 transmitters in "The Doctor is IN" [July 2005 QST, page 54] isn't quite correct. The BC-457, 458 and 459 transmitters were not, strictly speaking, ARC-5s. They were part of the SCR-274N Army Air Corps radio system. The ARC-5 transmitters were part of a Navy radio system series (the T-15 through T-22).--Tnx Dean Billing, WA6IKJ

In "The Transatlantic on 2200 Meters" [July 2005 QST, page 45], parts of equations 1 and 2 did not print. The equations should have read:

L = 1/2πf²C [Eq 1] and

R_g = P/I² [Eq 2]