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  • Ed Hare, W1RFI

    When someone has an unusual RFI problem, the first question he or she almost always asks is: What is it? That's an interesting question, and you may need to ask it during the troubleshooting process, but it is not the first question you should ask. First, even if someone were to say that it's a Model XYZ Panashibi swtiching  ... Learn More

  • Interference Primer - Parts 1 and 2 Derived from QST Lab Notes ...

    term for TVI, RFI, BCI and any other form of electromagnetically generated interference. Regardless of the terminology, ... Knowing all the technical tricks in the book won't do you a bit of good if your neighbor won't let you through the door ! ..... The best one is the ARRL book, The ARRL RFI Book. It was written by a number of. Learn More

  • Forum » RFI - Discussion and Q&A » Air Conditioner RFI

    The noise coming from the unit could be either common-mode or differential mode in nature (see http://www.arrl.org/files/file/Technology/RFI%2520Main% 2520Page/Hallas.pdf). More than likely, the noise is being conducted onto the ac mains. It could also be conducted onto other wiring such as the ... Learn More

  • ARRL :: ARRL Kindle Books

    Digital Storage Oscilloscopes for Ham Radio. Getting the most from a DSO in your ham shack! Available as an e-book. To order download the e-book in the Kindle format from Amazon. Item No. DOHR - $9.99. Out of stock. Digital Storage Oscilloscopes for Ham Radio ... Learn More

  • 20 EMC Committee

    Jul 22, 2014 ... RFI problems. • Write and publish articles about RFI. • Write and publish the ARRL RFI Book. • Design and update ARRL's RFI web pages. • Maintain a database at ARRL to facilitate EMC case tracking and reporting. • Work with ARRL's D.C. office on various spectrum and RFI-related filings. • Maintain ... Learn More

  • Additional ARRL Books Now Available as E-Books

    08/04/2015. ARRL has announced plans to significantly increase the availability of its publications as e-books. At the same time, the League introduced six more ARRL titles in the popular Amazon Kindle format. “I'm very pleased that members and readers will find more and more ARRL books available in the reading format  ... Learn More

  • Locating RF Interference at HF

    Tom Thompson, WØIVJ. Radio frequency interference (RFI) in- creased dramatically in my neighborhood recently. Locating the sources was not easy, due in part to the distances involved. The typical range for a consumer device that meets the applicable FCC Part 15 or. 18 emissions limits is usually no more than a few ... Learn More

  • Forum » Antennas, feed lines, baluns and antenna tuners » tvi

    Although this problem is covered in more depth on page 19.9 of the 3rd edition ARRL RFI Book, here are some things that you can try… First, you don't say anything about the speakers. If they are external to the TV, an easy thing to try is moving the speakers and bundling the wires. Or, if they are internal ... Learn More

  • ARRLWeb: ARRL EMC Committee Semi-Annual Report

    Jan 17, 2015 ... Answer individual inquiries from hams (and sometimes their neighbors) about. RFI problems. •. Write and publish articles about RFI. •. Write and publish the ARRL RFI Book. •. Design and update ARRL's RFI web pages. •. Maintain a database at ARRL to facilitate EMC case tracking and reporting. Learn More

  • MFJ-5008 Ultrasonic Receiver

    tion of The ARRL RFI Book for more informa- tion. 2See “A Home-made Ultrasonic Power Line Arc. Detector” by James T. Hanson, W1TRC, QST,. Apr 2006, p 41, for complete details on build- ing an ultrasonic pinpointer. Feedback appears on page 99 of the June 2006 issue. 3Links to PDF versions of all MFJ manuals, in-. Learn More