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ARRL Products:
Interference/DF(More)
AC Power Interference Handbook -- New insights into the causes, effects, locating and correction of power-line and electrical interference. 3rd Edition.
The RSGB Guide to EMC -- Tackle RF interference problems and understand the underlying causes.
Amateur Radio Astronomy -- Explore the contributions of radio amateurs, and how to make and set up equipment to study the signals coming from space.
Transmitter Hunting -- Radio Direction Finding Simplified
The ARRL RFI Book -- Now Shipping!
-- Second Edition. Practical Cures for Radio Frequency Interference.
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June 2008 QST Feedback
In the last full paragraph of p 41 in “Lightning: Understand it or Suffer the Consequences” [Feb 2008], the charge on the Earth’s surface is positive.
In “The Switcher” [Apr 2008, p 76], Figure 1shows fuses in both the hot (F1) and neutral (F2) power leads. F2 should be eliminated to be in compliance with the National Electrical Code and to eliminate the safety hazard that would exist if F2 opened and F1 didn’t. The labels of relay contacts K1B and K1C in Figure 1 should be reversed to agree with Figure 2. Toggle switch S3 should be shown as open (receive).
In the sidebar “Homebrew Challenge Results are In!” [May 2008, p 36], NM0S is David Cripe. We apologize for misspelling his name.
In “The TAK-40 SSB CW Transceiver!” [May 2008, p 33], we neglected to provide the author’s offer of programming for PIC processors. He will either program your PIC if you send it to him, or provide a fully programmed PIC at less than the single unit price of an unprogrammed device. To send a PIC for programming, mail to Jim Veatch, WA2EUJ, 1704 Bolton St, Baltimore, MD 21217. Be sure to send the PIC in its static protecting tube in a padded mailer so the pins don’t get bent. Include enough postage and a return address label. He will program the chip, put it back in the mailer with the new label and postage and send it back programmed with the boot loader and TAK-40 code. If you would rather purchase one already programmed, contact Jim by mail at the above address or email wa2euj@arrl.net. He can accept checks, money orders or PayPal. The current unit price at JAMECO is $5.15 but he will buy them in quantity and will sell them fully programmed for $4.25 each plus postage. When someone contacts him, he will tell then the postage amount based on shipping address, as well as expected delivery date. For those who wish to program their own, the code has been available on www.arrl.org/files/qst-binaries/. We have recently added a readme.txt file that provides a guide to the multiple software files.
Page last modified: 01:45 PM, 05 May 2008 ET
Page author: qst@arrl.org
Copyright © 2008, American Radio Relay League, Inc. All Rights Reserved.
