Of course ARRL wants QEX to be the best technical magazine that it can be, and we love printing on that heavy paper stock, and those glossy color covers that our Graphics Supervisor, Sue Fagan, KB1OKW, designs for each issue never fail to grab our attention! The reality, however, is that the heavy paper and cover stock comes at a price. We have seen our paper costs rise significantly, and Cathy Stepina, QEX Circulation Offices 225 Main St, Newington, CT 06111-1494 USA Telephone: 860-594-0200 Fax: 860-594-0259 (24 hour direct line) e-mail: qex@arrl.org Subscription rate for 6 issues: In the US: ARRL Member $24, nonmember $36; US by First Class Mail: ARRL member $37, nonmember $49; International and Canada by Airmail: ARRL member ARRL Lab Test Engineer, Bob Allison, WB1GCM, organized the first kit building section of ARRL Expo. He was assisted by ARRL Education and Technology Program Coordinator, Mark Spencer, WA8SME and Nathan McCray, K9CPO, all weekend. Several others assisted with a number of of the building "classes," including yours truly. Bob had two kits ARRL-Veröffentlichungen auf CD-ROM (QST, NCJ, QEX) Sortieren nach A bis Z Z bis A Preis aufsteigend Preis absteigend Neueste Produkte zuerst Älteste Produkte zuerst Am meisten verkauft ARRL-Periodicals 2021 DVD (QST, NCJ, QEX): Alle ARRL-Publikationen des Jahres 2021 im PDF-Format auf einer DVD Enthalten sind alle Ausgaben der Zeitschriften: QST (The official membership journal of ARRL) 12 Hefte 1-2021 bis 12-2021 NCJ (National Contest Journal) 6 Hefte QEX (Forum for Communications QEX May/June 2018 3 Bob Larkin, W7PUA 2982 NW Acacia Place, Corvallis, OR 97330; w7pua@arrl.net DSP-Based Vector Network Analyzer for 10 Hz to 40 kHz This impedance measuring system, based on the Teensy Arduino microprocessor, also measures amplitude and phase in transmission mode. Control is by built-in touch screen along with serial control through a USB cable. Network analyzers at RF k9an@arrl.net Glendella, Wycombe Rd., Stokenchurch, High Wycombe HP14 3RP, England; g4wjs@classdesign.com 272 Hartley Ave., Princeton, NJ 08540; k1jt@arrl.net Reprinted with permission; copyright ARRL. 8 QEX July/August 2020 all currently defi ned message types. Each type has a defi ned human-readable format that is mapped into a sequence of fi xed-length bit fi elds, each conveying ARRL 225 Main St. Newington, CT 06111 USA Telephone: 860-594-0200 FAX: 860-594-0259 (24-hour direct line) Officers President: Rick Roderick, K5UR P.O. Box 1463, Little Rock, AR 72203 The purpose of QEX is to: 1) provide a medium for the exchange of ideas and information among Amateur Radio experimenters, 2) document advanced technical work in the Alle ARRL-Publikationen des Jahres 2020 im PDF-Format auf einer DVD Enthalten sind alle Ausgaben der Zeitschriften: QST (The official membership journal of ARRL) 12 Hefte 1-2020 bis 12-2020 NCJ (National Contest Journal) 6 Hefte QEX (Forum for Communications Experimenters) 6 Hefte you can download from this page a .pdf file (about 1 Mb) or ask for a copy to ARRL-QEX Editor- for personal use and amateur radio interest only. The above push-pull preamplifier schematic alone has been included by John Delvoldere, ON4UN in Low - Band DXing (Fourth Edition) by ARRL ISBN: -87259-914- to quote or reprint material from QEX or any ARRL publication, send a written request including the issue date (or book title), article, page numbers and a description of where you intend to use the reprinted material. Send the request to the office of the Publications Manager (permission@arrl.org). Features In