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QRP Notes and Definitions Page 1 Philosophy Practice QRSS
QRP notes and definitions Page 1 QRP operation From Wikipedia, the free encyclopedia In amateur radio, QRP operation means transmitting at reduced power levels while aiming to maximize one's effective range while doing so. The term QRP derives from the standard Q code used in radio communications, where "QRP" and "QRP?" are used to request, "Reduce power", and ask "Should I reduce power?" respectively. The opposite of QRP is QRO, or high-power operation. Philosophy Most amateurs use approximately 100 watts on HF and 50 watts on VHF/UHF, but in some parts of the world, like the US, they can use up to 1500 watts. QRP enthusiasts contend that this is not always necessary, and doing so wastes power, increases the likelihood of causing interference to nearby televisions, radios, and telephones. A lot of Amateurs subscribe to the idea, use "the minimum power necessary to carry out the desired communications". The current record for a QRP connection is 1 µW for 1,650 miles on 10m. Practice There is not complete agreement on what constitutes QRP power. While most QRP enthusiasts agree that for CW, AM, FM, and data modes, the transmitter output power should be 5 watts (or less), the maximum output power for SSB (single sideband) is not always agreed upon. Some believe that the power should be no more than 10 watts peak envelope power (PEP), while others strongly hold that the power limit should be 5 watts. QRPers are known to use even less than five watts, sometimes operating with as little as 100 milliwatts or even less. -
The Army Amateur Radio System: 1925-1941
The Army Amateur Radio System: 1925-1941 A Monograph by Major Scott B. Hedberg United States Army School of Advanced Military Studies United States Army Command and General Staff College Fort Leavenworth, Kansas AY 2010 Approved for Public Release; Distribution is Unlimited SCHOOL OF ADVANCED MILITARY STUDIES MONOGRAPH APPROVAL Major Scott B. Hedberg Title of Monograph: The Army Amateur Radio System: 1925-1941 Approved by: __________________________________ Monograph Director Dan Fullerton, Ph.D. __________________________________ Monograph Reader Michael A. Hochwart, Col., German Army ___________________________________ Director, Stefan Banach, CL, IN School of Advanced Military Studies ___________________________________ Director, Robert F. Baumann, Ph.D. Graduate Degree Programs Disclaimer: Opinions, conclusions, and recommendations expressed or implied within are solely those of the author, and do not represent the views of the US Army School of Advanced Military Studies, the US Army Command and General Staff College, the United States Army, the Department of Defense, or any other US government agency. Cleared for public release: distribution unlimited. 1 Abstract THE ARMY AMATEUR RADIO SYSTEM: 1925-1941 by MAJOR Scott B. Hedberg, United States Army, 78 pages. This monograph conducts a historical study of the Army Amateur Radio System, the predecessor to the Military Auxiliary Radio System (MARS). MARS is primarily known for its performance during the Vietnam conflict in providing morale communications for US service personnel. In 2009, the Department of Defense changed the MARS mission to support homeland security functions by using MARS to provide backup emergency communications to local, state, and federal authorities. Viewed as a new direction for MARS, the responsibility of providing emergency communications is the same mission that was ably conducted by the Army Amateur Radio System prior to the United States entry into World War II. -
The Beginner's Handbook of Amateur Radio
FM_Laster 9/25/01 12:46 PM Page i THE BEGINNER’S HANDBOOK OF AMATEUR RADIO This page intentionally left blank. FM_Laster 9/25/01 12:46 PM Page iii THE BEGINNER’S HANDBOOK OF AMATEUR RADIO Clay Laster, W5ZPV FOURTH EDITION McGraw-Hill New York San Francisco Washington, D.C. Auckland Bogotá Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto McGraw-Hill abc Copyright © 2001 by The McGraw-Hill Companies. All rights reserved. Manufactured in the United States of America. Except as per- mitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher. 0-07-139550-4 The material in this eBook also appears in the print version of this title: 0-07-136187-1. All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after every occurrence of a trade- marked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringe- ment of the trademark. Where such designations appear in this book, they have been printed with initial caps. McGraw-Hill eBooks are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs. For more information, please contact George Hoare, Special Sales, at [email protected] or (212) 904-4069. TERMS OF USE This is a copyrighted work and The McGraw-Hill Companies, Inc. -
QRP Contesting and Dxing K6UFO - Mark “Mork” Aaker
QRP Contesting and DXing K6UFO - Mark “Mork” Aaker QRP LOW Power HIGH Power “QRP” is an old telegraph signal: “lower your power.” QRP? = Can you lower your power? Today, the standard Amateur Radio meanings are : • QRP = 5 Watts or less transmitter power. • Low Power = up to 100 Watts, e.g., a “barefoot” radio. (up to 150 Watts in ARRL contests) • High Power “QRO”, from 100 W (or 150 W) up to the contest limit (1,500 W) or the country’s legal limit. Canada: 2,250 W PEP USA 1,500 W Japan: 1,000 W Italy: 500 W U.K.: 400 W Oman: 150 W How MUCH Power? • Total Energy Output of the Sun 10^26 W • Nuclear reactor 1 Gigawatt = 10^9 W • Shortwave Broadcast 1 Megawatt = 10^6 W • AM/FM radio Broadcast 50,000 W • Digital TV Broadcast 10,000 W • Amateur Radio 1,500 W • Microwave oven 1,000 W @ 2.45 GHz How little Power? • Amateur Radio 1,500 W – 100 W – 5 W • Christmas tree bulb 7 W – 5 W • CB Radio 4 W • LED Flashlight 3 W – 1W • Cell phone 2 W - 0.002 Watt • FRS radio 500 milliwatt • WiFi transmitter 100 milliwatt – 0.1 mW • Equivalent light output of a Firefly 1 mW It’s the Law! …as far as I can tell, no Amateur has ever been cited. Let’s get this out of the way, Can QRP really work? ARRL Field Day 2012: #3 highest score, station K6EI, 2,827 contacts, 5 watts. #5 highest score, station W5YA , 1,937 contacts, 5 watts. -
History of Amateur Radio
History of Amateur Radio Pioneers of Wireless Communications Evolution of Ham Radio Audio Clip from Jean Sheppard, K2ORS Hams You May Have Heard Of Some Interesting Books Walter Cronkite video, “Amateur Radio Today” 1831 Michael Faraday Demonstrates Induction Principle: Electricity and Magnetism Are Related 1850 James Clerk Maxwell Advances Theory that Light is an Electromagnetic Wave 1864 Mahlon Loomis transmits wireless telegraphy 18 miles between two mountains using kites as antennas 1870 Loomis accomplishes successful ship to ship wireless communications over two miles on the Chesapeake Bay under U.S. Navy sponsorship 1884 Edison Patents “The Edison Effect”, his only discovery 1 in pure science - Electrons flow from a heated filament to a cold plate through a vacuum Edison patented the idea but wrongly dismissed it as just a scientific curiosity with no practical use 1 This phenomenon was actually discovered by British physicist Frederick Guthrie in 1873 and “re-discovered” by Edison in 1880 1886 Heinrich Hertz Proves Maxwell’s Theory Through Experimentation 1899 Marconi sends a wireless message across the English Channel 1901 Marconi sends a message across the Atlantic 1900 Reginald A. Fessenden succesfully transmits voice over a distance of 1 mile December 24, 1906 Prof. Fessenden demonstrates audio-modulated CW, presenting the world’s first radio broadcast, including voice and music, from Brant Rock, MA 1904 John Ambrose Fleming Introduces the “Thermionic Valve” – the first vacuum tube 1906 Lee De Forest Introduces the Audion 1918 Major Edwin Armstrong Discovers the Superheterodyne Principle – the basis for virtually all modern radios and televisions How did the term “Ham Radio” originate? Here are a few popular theories that have no basis in fact . -
World of QRP
World of QRP Tino Zottola, VE2GCE August 17, 2020 Agenda • Introduction • Operation • QRP History • Classic QRP radios • Common Architecture • Modern kits • Antennas • Challenges & Solutions • Conclusion Tino Zottola, VE2GCE, Aug 17, 2020 Introduction What is the appeal of QRP ? 1. Challenge: Long distance communication with the power of flashlight batteries. 2. Simplicity: Most QRP equipment is a kit / homebrewed and is easy to operate User knows function of each component. 3. Nostalgia: Reliving the old days when contacts were made with primitive equipment and each contact was an achievement. Tino Zottola, VE2GCE, Aug 17, 2020 Definition QRP = “Reduce power“ QRP enthusiast’s goal ➔ Use minimum power possible to carry out the desired communications The difference between 100 watts and 1 watt is only 20 dB or (3.3 S units) • 5 Watts (max) CW /FT8 • 10 Watt (max) SSB QRPp (extreme QRP): Sub-watt region • Using 100 milliwatts, 10 milliwatts or 1 milliwatt Commonly used benchmark is ratio of distance / power • Montreal - Charleston, SC: 1000 miles with 1000 watts ➔ 1 mile / watt • Montreal - Charleston, SC: 1000 miles with 1 watt ➔ 1000 miles / watt • Montreal - Eastern Australia: 10000 miles with 1 watt ➔ 10,000 miles / watt • Montreal - Eastern Australia: 10000 miles with 0.001 watt ➔ 10,000,000 miles / watt Tino Zottola, VE2GCE, Aug 17, 2020 Operation QRP station can be implemented in one of three ways: 1. Regular transceiver with power dialed down to 1 to 10 watts 2. QRP transmitter + conventional receiver 3. QRP specific transceiver(*) *Many QRP specific transceivers use simple DCO receivers (i.e. less sensitivity than superhet). -
Finding Your Ham Roots by Martin Crabtree, W3PR
Finding your ham roots A history of amateur radio call signs & tracing the history of your own call sign Martin Crabtree – W3PR Finding you ham roots • Call sign terminology • History of call signs in the U.S. • Tracing the history of your call sign • Callbooks • FCC ULS • Looking at the history of some call signs & a call sign quiz Call sign terminology KD2VRA Prefix Suffix Call area/district Call sign structure Call signs are referred to by the number of letters before and after the call area number: • 1 X 2 - W2ZQ • 1 X 3 - K2AFO • 2 X 1 - NJ3U • 2 X 2 - AB2VG • 2 X 3 - KD2OTG W2ZQ WA3DX AA2F WA2TMF AB2IO W3TEC AB2VG W3PR AC2RY KD2OTG AD2TR W2SRH KD2MXH K2AFO KC2MTO W2JIL KD2FDT W2JEJ KC3BHD NJ3U K2GW KD2PIA K2PCG N3DD KC2VDL KC1JGT N2GJ K2VPX N2JOY KB2GBQ K3EA K2WLD KC2PQC KC2TGM AB2DB WE1X KD2KEM KD2NVP AB2RC KB2KBZ WB2ZUB KD2NXE AF4NC WA3NEQ KD2FIH WA3ZST K2AAR N2CAU KC3LXC N2HUN KD2OZV WA2FGD K2MJD W2JMZ KC2VDM KD2Q K2NJH KD2OZX W2HRO KC2OXO KD2PHX KC2NSY KD2PIB K2QM KD2QFA KC2ISY W2GEZ K2RIX KC2CKI W1PAM N2MPM KB2RMS NW3T KB2FA KA2EOB N2PJU W2ZQ W2ZQ N3DD K3DQZ NJ3U W3ZET K3EA Ham Call Sign History W1AW K2WLD W1BB WA3RCA K3CR W2ZQ WA3DX AA2F WA2TMF AB2IO W3TEC AB2VG W3PR AC2RY KD2OTG AD2TR W2SRH KD2MXH K2AFO KC2MTO W2JIL KD2FDT W2JEJ KC3BHD NJ3U K2GW KD2PIA K2PCG N3DD KC2VDL KC1JGT N2GJ K2VPX N2JOY KB2GBQ K3EA K2WLD KC2PQC KC2TGM AB2DB WE1X KD2KEM KD2NVP AB2RC KB2KBZ WB2ZUB KD2NXE AF4NC WA3NEQ KD2FIH WA3ZST K2AAR N2CAU KC3LXC N2HUN KD2OZV WA2FGD K2MJD W2JMZ KC2VDM KD2Q K2NJH KD2OZX W2HRO KC2OXO KD2PHX KC2NSY KD2PIB K2QM KD2QFA KC2ISY W2GEZ K2RIX KC2CKI W1PAM N2MPM KB2RMS NW3T KB2FA KA2EOB N2PJU Before there was radio… • There was the telegraph • Along telegraph lines, each telegraph station either picked or was given an identifier (aka call sign), often one or two letters. -
NAQCC Newsletter
NORTH AMERICAN QRP CW CLUB, INC. NAQCC NEWS ISSUE 267 • SEPTEMBER 2020 KEY CLICKS • NEW PAYPAL ADDRESS FOR DONATIONS NAQCC Treasurer Jerry K4KBL says we have a new PayPal account. Please send your donations via PayPal to: • GQRP CONVENTION 2020 — SEPTEMBER 5TH AND 6TH Our friends across the pond are doing a QRP convention via Zoom this weekend. Over 500 participants have already signed up and there's a great lineup of speakers (starting with Hans Summers) and topics. The morning sessions will be awfully early for most of us, but you'll have a chance to play them back at your leisure. http:// www.gqrp.com/convention.htm • NEW ARRL CEO IS AN NAQCC MEMBER Our very own member #6781 David NA2AA was just elected CEO of the ARRL! “Primarily a CW operator, Minster collects unique and vintage bugs and keys.” Congratulations David! Details on page 9. • LOTS OF FIRST-TIMERS IN THE AUGUST SPRINT! Welcome: AC2RL K4VLP K6GPB KG5OWB KJ4YM N0ZIB NZEIM N3OS W4KAC W7CBR & W9SAU. • KILOMETERS-PER-WATT CONTEST GIVES QRP OPS THE ADVANTAGE A new contest next month has a scoring system that rewards minimal power. Multipliers for cw and portable operations. Details on page 21. • IN THIS ISSUE A fun letter challenge you’ve ‘herd’ about, some handy tips, John KE4D tells his radio story, the Prez Sez he has lots of great news, a feature that can be beat, member polls, Sprints, awards, nets, and more. • YOUR STORIES NEEDED Send your article, project, or ham radio biography to Paul KD2MX 2 THE PREZ SEZ.. -
Fsithista.Pdf
BC Forest Service - Centenary Society Page 1 of 2 Printer Friendly Home Search Membership Contact Us Home Our People Technological Advances Our Places Radio Reports Our Stories Excerpted from the Forest Service Newsletter, Dec. 1956 (No. 121) p.12 Timeline Technological Advances Radio communication, which has long been the medium for the acceleration and co- Photo Gallery ordination of all phases of Forestry, is in the process of a complete change-over from the old to the new method of transmission and system planning. This Calendar of Events conversion made measurable progress in 1955, and field work carried out by the Links & Resources Radio Section in 1956 has paved the way for significant improvements planned to Promotional Materials start in 1957 and to continue for at least 5 years. Site Map The fact is that the medium frequency channels between 2 and 3.5 megacycles, which have served us for twenty years, have outworn their usefulness in the face of New Technology modern expansion in power lines and many other noise-creating electrical devices. Camera Booms National and international crowding of stations on these bands has added to the already near-impossible electrical noise level, to produce a transmitting medium The original MoF which frequently prevents the operation of even our headquarters stations. Inventory Branch camera boom was ... During the past year, Kamloops district network virtually went off the air for three read more > weeks due to a newly-erected power line. Many Nelson Ranger Stations can no longer use radio due to the radiation of high-level transmission lines and, during the 1956 fires season, Prince George District was crowded off the air by a multiplicity of Forest Service radio stations working on channels to either side of the District Featured Items frequency. -
Comments of Arrl, the National Association for Amateur Radio
Before the FEDERAL COMMUNICATIONS COMMISSION Washington, D. C. 20554 In the Matter of ) ) IB Docket 18-313 Mitigation of Orbital Debris in the New Space Age ) To: The Commission COMMENTS OF ARRL, THE NATIONAL ASSOCIATION FOR AMATEUR RADIO ARRL, the national association for Amateur Radio, formally known as the American Radio Relay League, Incorporated (ARRL), submits these comments in response to the Commission’s proposals in its Notice of Proposed Rulemaking in the above-referenced proceeding.1 The League represents many radio amateurs engaged in amateur satellite communications and experimentation. The ARRL supports reasonable efforts to mitigate orbital debris. In addressing the problem of space debris, however, the Commission must tailor its regulations for the amateur satellite service so that they are appropriate for this service -- and do not inadvertently impair the service’s continuing vitality by applying rules crafted for commercial satellite services. The purely private and non-profit experimenters in the amateur satellite service, governed by Part 97 of the Commission’s Rules, have substantially different regulatory needs than the commercial entities that are governed by Part 25. The radio amateur space experimenters’ needs are consistent with the need for mitigating space debris, but require provisions that are modified from those applied to commercial space entities. In this regard, the ARRL supports the Comments submitted by the Radio Amateur Satellite 1 FCC 18-159, 84 Fed.Reg. 4742 (released Feb. 19, 2019). Corporation (AMSAT). In those Comments, AMSAT suggests the nature of the modifications needed that would achieve the Commission’s expressed regulatory objectives without needlessly impairing the amateur satellite service. -
Mfj-971 Qrp Portable Antenna Tuner
MFJ-971 QRP PORTABLE ANTENNA TUNER GENERAL DESCRIPTION: The MFJ-971 is a compact 200-Watt portable tuner compatibly packaged with. MFJ QRP transceivers. The MFJ-971 is also a perfect mate for any of today's ultra-compact SSB radios. It provides a convenient cross-needle type SWR/Wattmeter and features a special user-selectable 6-Watt range for QRP operation. The T-match tuner covers 1.8-30 MHz and tunes almost any coax, wire, or balanced-feed type antenna (a 4:1 toroid balun is built in for balanced line). READING THE CROSS NEEDLE SWR INDICATOR: The MFJ-971 uses a cross- needle style meter to display FORWARD power, REFLECTED power, and SWR simultaneously. To read Forward Power, observe the FORWARD meter scale. To read Reflected Power, observe the REFLECTED meter scale. To read SWR, observe where the two needles cross. The corresponding red curve on the meter face displays your SWR reading. No "zero" or "sensitivity" adjustment is required with cross-needle SWR displays. POWER LEVELS: The FORWARD scale is calibrated from 0-300 Watts and the REFLECTED scale from 0-60 Watts. In the high-power range, read both scales directly (x 1). In the 30 Watt range, move the decimal point one place to the left (x 0.1). For QRP sensitivity (6-Watts FORWARD, 1.2-Watts REVERSE), you must perform a simple conversion to obtain actual power. You can convert in your head by moving the decimal point two places to the left and doubling the reading (ie. 300 W = 3.00 x 2 = 6 W). -
Elmer's Night
1 Flathead Valley Amateur Radio Club “Elmer’s Night ” WHAT CAN I DO NOW THAT I HAVE MY AMATEUR RADIO LICENSE? Find a Club: Absolutely the best way to become active is to join a club. At a club you will find hams involved in various Amateur Radio activities. Each club has it’s own flavor and interests. Folks tend to join a club whose members share similar interests. Check out the clubs in your area and find one that is involved with activities that interest you. All clubs welcome guests so visit them and find which one matches your interest, then GET INVOLVED! You can’t learn to swim until you get your feet wet. Here’s a list of local clubs – (in alphabetical order). Volunteer to help with club activities and you will soon find you have some great new friends. HAM Clubs Kalispell , MT: Flathead Valley Amateur Radio Club - http://www.fvarc.org/ (Local Nets/meetings/Events) Billings, MT: Yellowstone Radio Club -www.k7efa.net/ Bozeman, MT: Gallatin Ham Radio Club -gallatinhamradio.com/ Eureka, MT: Tobacco Valley Amateur Radio Club - tvarc.org/ Great Falls, MT: Great Falls Area Amateur Radio Club - www.w7eca.org/ Great Falls, MT: Electric City Amateur Radio Club - w7ecr.org/ Helena MT: Capitol City Amateur Radio Club - ccarc.org/ Joliet, MT: Beartooth Amatuer Radio Club - wb7ris.tripod.com/index.html Missoula, MT: Hellgate ARC - www.w7px.org/ Hamilton, MT: Bitterroot Amateur Radio Club - w7ftx.tripod.com/ Cranbrook BC: East Kootenay Amateur Radio Club - www.qsl.net/ekarc/ 2 ARRL – National Association for Amateur Radio : Founded in 1914, the ARRL (Amateur Radio Relay League) is the National Association for Amateur Radio.