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ARRL Products: Operating (More) Radio Amateur Callbook CD-ROM (2010) -- Coming early December! -- Winter Edition! More than 1,600,000 licensed radio amateurs! Includes International and North American listings and Amateur Radio Prefix Maps. Getting Started with Ham Radio -- Get on the air now! A guide to your first Amateur Radio station. ARRL's HF Digital Handbook -- Join the Digital Race! 4th Edition. 2010 ARRL Amateur Radio Calendar -- Now Shipping! -- Deluxe 13 month calendar, featuring a selection of QSL cards from the W1AW collection. Includes important ham radio dates: contests, operating events and more! The ARRL DXCC Handbook -- Worldwide ham radio operating and the ARRL DXCC Award!

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]