AMRAD Newsletter

Published bimonthly

Amateur Radio experimenters specializing in telecommunications technology

To receive the Newsletter, join AMRAD by completing the membership application and mailing it with dues to
AMRAD, PO Drawer 6148, McLean, Virginia 22106-6148, USA

Recent Articles of Interest

2014
Nov - DecMinutes of October 11, 2014 Board Meeting
Karl Berger, W4KRL, "AMRAD's Twitter Feed"
Photos of Equipment from the AWA Museum
Paul J. Mooney, K4KRE, "The Antique Wireless Society"
Bill Fenn, N4TS, "The AMRAD Crossword"
Bill Liles, NQ6Z, "The Race to Communicate Across the Atlantic"
Sep - OctTBD
Jul - AugMinutes of May 24, 2014 Board Meeting
Founding Member Paul Rinaldo, W4RI, Elected as President Emeritus
Board Resolution
Frank Gentges, KØBRA, "The Doomsday Machine: The HP8655A Spectrum Analyzer"
André Kesteloot, N4ICK, "The Northern Virginian Peasant Algorithm"
Keith Elkin, KB3TCB, "Amateur Radio Computer Compatible Networks"
May - JunAndré Kesteloot, N4ICK, "Synchronizing an Amateur Radio Frequency Hopping Spread-Spectrum System"
Dick Barth synopsis of presentation by Karl Berger, W4KRL, "Arduino Motor Control"
AMRAD at the 2014 Vienna Wireless Winterfest
Mar - AprTBD
Jan - FebAndré Kesteloot, N4ICK, "A Spread-Spectrum Frequency-Hopping Transmitter Module"
Bill Liles, NQ6Z, "Dip into the Archives - 100 Years of Amateur Aerials"
AMRAD 2013 Party Photos
2013
Nov - DecTBD
Sep - OctTBD
Jul - AugTBD
May - JunDavid Wilson Borden, K8MMO (SK)
Hal Feinstein, WB3KDU, "An RF Transmitter Project that Uses The Raspberry Pi"
Dick Barth Synopsis of April 2013 presentation by Ron Payne, WA6YOU, "Over-the-Air Digital Television and Field-Expedient TV Antennas"
Review by Karl Berger, W4KRL, "Ham Radio for Arduino and PICAXE, Edited by Leigh Klotz Jr. WA5ZNU"
Dick Barth Synopsis of March 2013 presentation by Andrea Hartlage, KG4IUM, "Involving Youth in Ham Radio and A Look Inside the ARRL Board Room"
Mar - AprVienna Wireless Winterfest Photos
AMRAD Minutes of January 19, 2013 Board Meeting
Dick Barth Synopsis of February 2013 presentation by Paul Mooney, K4KRE, "An Experimental SDR Project"
Karl Berger, K4KRL, "Op-Amp Development Kit"
Paul Justin Time, J1NTM, "HUMOR - An AMRAD Microprocessor Project"
Dick Barth Synopsis of January 2013 presentation by Jim Veatch, WA3EUJ, "ARRL Homebrew Challenges"
Jan - FebAMRAD December 13, 2012 Minutes of Annual Meeting
Dick Barth Synopsis of November 2012 presentation by André Kesteloot, N4ICK, "A 40-Meter Class E Rig", and George Lemaster, WB5OYP, "Non-Linear Effects"
Paul J. Mooney, K4KRE, "Glenn Baumgartner's Moon Bounce"
AMRAD 2012 Financial Report, Presented at 2012 Annual Meeting
2012
Nov - DecOctober 2012 presentation by Terry Fox, WB4JFI, "Arduino Fun"
Paul J. Mooney, K4KRE,"A Low-Cost Introduction to Software Defined Radio"
Dick Barth Synopsis of Sept. 2012 presentation by John Donaldson, AB8YZ,"Applications of HSMM-MESH"
Sep - OctDick Barth Synopsis of August 2012 presentation by Bob Sullivan, W0YVA,"Boat Anchor Restoration"
Joe Novak, K4OVK (SK)
Dick Barth Synopsis of June 2012 presentation by Sir Richard O’Neill, Wizard (a.k.a. KB3RSJ),"How to Make a Crystal Set"
Dick Barth Synopsis of May 2012 presentation by Kevin Whipp, W3KDW, David Bern, W2LNX and Vic Nardo, WB2U,"HSMM-MESH"
Picture of ARRL Stand at Berryville 2012 Hamfest
Jul - AugDick Barth Synopsis of March 2012 presentation by Terry McCarty, WA5NTI, "Automating a Ham Station (DXLab)"
Karl Berger, W4KRL, "A Dollar Store Boost Mode Converter for LED Bulbs"
Dick Barth Synopsis of April 2012 presentation by Brennan Price, N4QX, "WARC-12 and a Possible domestic Allocation at 472-479 kHz"
May - JunAndré Kesteloot, N4ICK, "Further to the ABC of uPs"
Bill Fenn, N4TS, "AMRAD Displays SMT Soldering at the National Electronics Museum Robot Fest"
Dick Barth Synopsis of Jan.2012 presentation by Greg LeSage, N6LYU, "The Terminated Folded Dipole (T2FD) Antenna"
David York, K9KUB, "Review: THe Spiratronics Picaxe Dice Project Kit"
Reprint, "Practical Radio Ideas, misc tube and other"
Photo, "AMRAD Gang One Saturday at Tacos"
André Kesteloot, N4ICK, "Adding an Auxiliary Input to a Bose SoundDock"
Hal Feinstein, WB3KDU, "Basic OFDM"
Paul Rinaldo, W4RI, "Unconditional Stability of Design (continued)"
André Kesteloot, N4ICK, "The ABC of uPs"
Jan - FebDick Barth Synopsis of November 2011 presentation by Dr. Michael King, "Software Defined Radio Systems"
Minutes of AMRAD Annual Meeting, December 15, 2011
Treasurers Report, December 15, 2011
Paul Rinaldo, W4RI, "Designing for Unconditional Stability"
2011
Nov - DecDick Barth Synopsis of October 2011 presentation by Bill Fenn, W4TS and Paul Rinaldo, W4RI,"Digital Amateur Television"
Karl Berger, W4KRL, "A Dollar Store Switch Mode Power Supply"
Terry Fox, WB4JFI, "SDR CUBE - Follow-Up"
Sep - OctBill Fenn N4TS and Dick Barth W3HWN, "The Saga of W3U"
Terry Fox, WB4JFI, "I'll Have My SDR To Go, along with a bag of chips"
Terry Fox, WB4JFI, "SDR CUBE - An Initial Overview"
Frank Gengtes, KØBRA and Bill Fenn, N4TS, "AMRAD at the 2011 ARRL Field Day"
Terry Fox, WB4JFI, "Adding RF Level Control to FPGA Signal Generator"
Jul - AugDick Barth Synopsis of June 2011 presentation by Christopher Patton, W3CUM/DC006, "SKYWARN"
Synopsis of May 2011 presentation by Terry Fox, WB4JFI, "Update on AMRAD: Charleston Chapter, Projects"(via Skype)
May - Jun Terry Fox, WB4JFI, "FPGAs Verilog Programming Basics"
AMRAD Field Trip to WMAL Transmitter Site
Frank Gentges, KØBRA, "Yes, Virginia. There is Life after AMRAD"
Dick Barth Synopsis of Feb.2011 presentation by Mike Toia, K3MT, "HF Antennas Close to the Ground-the Grass Wire Antenna"
Mar - AprDick Barth Synopsis of Jan. 2011 presentation by Bill Fenn, N4TS, and Frank Gentges, KØBRA, "Cooking with SMDs"
Terry Fox, WB4JFI, "FPGAs Verilog Programming Basics"
Frank Gentges, KØBRA, "AMRAD at Orlando Hamcation"
Jan - FebAMRAD Minutes of Annual Meeting, Dec.14, 2010
Terry Fox, WB4JFI, "FPGAs from Dummies"
AMRAD Minutes of Board Meeting, December 18, 2010
Dick Barth Synopsis of Nov.2010 presentation by Doug Lindsey, KB3HER, "SHARES, MARS and Emergency Communications"
Dick Barth Synopsis of Oct.2010 presentation by Terry Fox, WB4JFI, "Developments in SDR: The Charleston Receiver and Quisk"(via Skype)
2010
Nov - DecPhoto Gallery of Green Bank Visit
Dick Barth Synopsis of presentation by Andrew Clegg, W4JE, "The PERSEUS SDR Receiver"
Terry Fox, WB4JFI, "Charleston Receiver and Quisk"
Dick Barth Synopsis of presentation by Maitland Bottoms, AA4HS, "Radio over Internet Protocols, AMRAD Repeater Enhancements"
Sep - OctAndrew Mitz, WA3LTJ, "WSPR as an Emergency Status Beacon in Major Disasters: A Proposal"
Dick Barth Synopsis of presentation by Paul Rinaldo, W4RI, "Radio Propagation Prediction Methods"
Jul - AugTerry Fox, WB4JFI, "iSDR: Now There's an App for That!"
Terry Fox, WB4JFI, "Through the Charleston Receiver, Quiskly"
Dick Barth Synopsis of presentation by Greg P. Le Sage, N6LYU, "The Automatic Z-Match Tuner"
May - JunDick Barth Synopsis of presentation by Greg P. Le Sage, N6LYU, "The L-Network Impedence Matcher"
Dick Barth Synopsis of presentation by Steve Stearns, K6OIK, "The Smith Chart and its use in Matching Antennas..."
Terry Fox, WB4JFI, "Charleston SDR Receiver Software - HELP WANTED!"
Mar - AprDick Barth Synopsis of presentation by Mark Kanawati, N4TPY, "Texas-A Technical eXchange on AIS via Satellite"
"Roger A. Geesey, KG4IRH, SK"
Jan - Feb"AMRAD Minutes of Board Meeting, Dec.12, 2009"
Dick Barth Synopsis of presentation by Ron Payne, WA6YOU, "Field-Expedient Antennas"
Frank Gentges, KØBRA, "IRLP on the AMRAD Repeater"
Paul J. Mooney, K4KRE, "An Arduino Project"
2009
Nov - DecAndré Kesteloot, N4ICK, "Randy Mays, WA6RAM, SK"
Frank Gentges, KØBRA, "Charleston Group Build"
Dick Barth Synopsis of presentation by Dr. Joe White, WB4OLN, "Time and Frequency Transfer Using TV Signals"
Frank Gentges, KØBRA, "Is the FPGA the signal processing implementation of the future?"
Sep - OctTerry Fox, WB4JFI, "Charleston Exciter for Nexys2 FPGA Board"
Dick Barth Synopsis of presentation by Bill Fenn, N4TS, "The Transition to Digital TV and the ATSC Format"
Frank Gentges, KØBRA, "Surplus Rubidium Frequency Standards"
Jul - AugDick Barth Synopsis of presentation by Hal Feinstein, WB3KDU, "Fiber Optic Communications"
Terry Fox, WB4JFI, "Charleston SDR Receiver"
Minutes of the June 6, 2009 AMRAD Board Meeting
May - JunFrank Gentges, KØBRA, "Digital Sampling Oscilloscope Review"
Dick Barth Synopsis of presentation by Greg P. Le Sage, N6LYU, "RF Linear Electron Accelerators"
Mar - AprDick Barth Synopsis of presentation by Frederick H.(Fritz) Raab, W1FR, "WD2SXH -- The ARRL 500kHz Experiment"
Dick Barth Synopsis of presentation by Rob Seastrom, AI4UC, and Maitland Bottoms, AA4HS, "Implementation of the AMRAD Wiki"
Jan - FebSummary of AMRAD Meeting, December 6
John M. Franke, WA4WDL, "Photo-Electric Amplifier (PEA)"
Dick Barth Synopsis of presentation by Rob Seastrom, AI4UC, "An AMRAD Wiki"
André Kesteloot, N4ICK, "Feeding my iPhone"
2008
Nov - DecDick Barth Synopsis of presentation by R.C. Hansen, "Matching Electrically Short Antennas"
Dick Barth Synopsis of presentation by Greg P. Le Sage, N6LYU, "RF Skywave Propagation"
Sep - OctHal Feinstein, WB3KDU, "A Taste of Radio Astronomy"
Mike Chisena, KA2ZEV, "Radios for an AMRAD Six-meter Project"
Jul - AugPictures of AMRAD presence at Dayton and Skip Pratt's QTH
Dick Barth Synopsis of presentation by Tom Lauzon, P.E., KI4AFE, "RF Exposure Calculations for Hams"
AMRAD Board of Directors June 7, 2008 Meeting
Andy Mitz, WA3LTJ, "Essential Features for Emergency F1/F1 Operations"
May - JunAndré Kesteloot, N4ICK, "The Parakeet, a Repeater controller for Emergency F1/F1 Operation"
Terry Fox, WB4JFI, "SDR-F Hardware Design - 2008 Update"
Dick Barth Synopsis of presentation by Bob Bruninga, WB4APR, "APRS, the Automatic Packet Reporting system"
Mar - AprBob Bruninga, WB4APR, "APRS Meteor Scatter Email System"
Dick Barth Synopsis of presentation by Paul Najarian, "The Intelligent Transportation System"
Frank Gentges, KØBRA, "Software Defined Radio"
Jan - FebSummary of 2007 Annual Meeting
Treasurer's Report 2007
"An Interview with David Brainerd, WB6DHW"
Hal Feinstein, WB3KDU, "A Review of Basic Error Correcting Codes"
2007
Nov - DecDick Barth synopsis of presentation by Andrew Clegg, W4JE, "Radio Astronomy"
Sep - OctAndré Kesteloot, N4ICK, "A Low Voltage-drop Reverse Voltage Protection Scheme"
Paul Rinaldo, W4RI, "AMRAD Bench at ARRL HQ"
Dick Barth synopsis of presentation by David Kuraner, K2DK, "Restoration of Vintage Ham Equipment"
Marius Novi, WB4ENI, SK
Dick Barth synopsis of presentation by Dennis Sweeney, WA4LPR, "Beyond the Cell Phone: Wireless Widgets and Part 15"
Jul - Aug Terry Fox, WB4JFI, "Prototype DDS and QSD Board"
Dick Barth synopsis of presentation by Robert J. Fontana, AK3Y, "Ultra-Wideband Technology - An Update"
May - JunTerry Fox, WB4JFI, "An SDR Hardware Design Example - SDR-F"
Dick Barth synopsis of presentation by Frank Gentges, KØBRA, "Software Defined Radios (SDR)"
Dick Barth, W3HWN, "The Garmin Placer GPS 455-DR"
Mar - AprDick Barth synopsis of presentation by Maj. Gen. (USA, Ret) Charles G. (Chuck) Sutten Jr. "Tactical Communications”
An Operator's Perspective, 1956-2006"
Dick Barth synopsis of presentation by Hal Feinstein, WB3KDU, "Ad Hoc Mobile Networks - Networks Without an Infrastructure"
Bob Cullen, W8MAU, "The Biggest Junk Box in the World"
André Kesteloot, N4ICK, "Yet Another Morse Code generator/IDer."
Report from the Winterfest
Jan - FebTerry Fox, WB4JFI, "Sound Cards, SoftRocks, and SDRs"
André Kesteloot, N4ICK,"An UpConverter for the 500kHz Band"
"Minutes of Annual Meeting, and Treasurer's Report 2007"
2006
Nov - DecDick Barth synopsis of presentation by Paul Rinaldo, W4RI, "Amateur Preparations for WARC-07"
Karl Berger, W4KRL, "Expanded Scale Voltmeter"
André Kesteloot, N4ICK, "Zero Beat?"
Sep - OctDick Barth synopsis of presentation by Byron "Bo" Genner, Lucent, "Next Generation Networks: 3G and IMS"
Bob Bruhns, WA3WDR, (encoded title) Circularly Polarized Antenna for HF
André Kesteloot, N4ICK, "A 100 Watt CW Transmitter for the 500kHz Band"
Jul - Aug AMRAD Board of Directors Elects Terry Fox, WB4JFI, as President Emeritus
Dick Barth synopsis of presentation by Dick Parks, "Non-Cooperative Target Recognition (NCTR)"
Dick Barth synopsis of presentation by Mike Toia, K3MT, "Understanding Antennas - a Mostly Math-free Approach"
Dick Barth, W3HWN, "Off to the Races"
Dick Barth synopsis of presentation by Terry Fox, WB4JFI, and Hal Feinstein, WB3KDU, "An Appreciation, and Plans for the Future"
May - JunAlan Melia, G3NYK, "136kHz Propagation Update"
Finbar O'conner, EIØCF, "Transmitter/Driver for 136kHz"
Mike O'Dell, N4NLN, "When Neatness Counts"
André Kesteloot, N4ICK, "An Oven For Your Experiments"
Mar - AprFrank Gentges, KØBRA, "The AMRAD Active Antenna After Five Years"
Dick Barth synopsis of presentation by Dennis Sweeney, WA4LPR, "GPS-Locked Frequency Standard"
Dick Barth synopsis of presentation by Paul Mooney, K4KRE, "Crystal Receiving Sets (slides)"
Jan - FebDick Barth synopsis of presentation by André Kesteloot, N4ICK, "Operating tubes at Low Plate Voltages"
Dick Barth synopsis of presentation by Ian McFadyen, KI4HLV, "AMRAD Participation in the 2005 Marine Corps Marathon"
AMRAD Annual Meeting Report and Treasurer's Summary Report
2005
Nov - DecBob Bruhns, WA3WDR, "The Xero-Point: Feeding a Dipole With Coax Without a Balun"
Dick Barth synopsis of presentation by Bob Curry, KC3VO, "KiloWatt Motorcycle Trailer"
Dick Barth synopsis of presentation by Henry Lee, KB1PE, "LF Experiments"
"FRS, GMRS, and PMR446"
"Manassas BPL Events"
Sep - OctMike Tuggle, WY3B, "One-JFET BFO Low-Frequency Crystal Receiving Set"
Pictures of AMRAD Van at Field Day
Dick Barth synopsis of presentation by Ed Kennedy, "HAARP"
Mike Chisena, KA2ZEV, "From Our Middle East Correspondent"
Jul - Aug André Kesteloot, N4ICK, "The Ohm's Law Puzzle"
AMRAD Extra-Ordinary Board of Directors Meeting May 7, 2005
Dick Barth synopsis of presentation by Hal Feinstein, WB3KDU, "The 802.11 Protocol"
Dick Barth synopsis of presentation by Ron Payne, WA6YOU, "Attaching Coax Connectors"
Paul Rinaldo, W4RI, "Review of: Practical Radio Frequency Test & Measurement"
May - Jun Fritz Raab, W1FR, Mike Gladu, N1FBZ/2, & Dan Rupp, "Complementary Class-D Power Amplifier for LF and MF"
André Kesteloot, N4ICK, "Ohm's Law, and All That..."
Mar - AprDick Barth synopsis of presentation by Frank Maas, "Video Compression Methods"
André Kesteloot, N4ICK, "An Emergency Supply for the Home"
Jan - FebAMRAD Van Work Party with pictures
Minutes of AMRAD Annual Meeting December 9, 2004
Minutes of AMRAD Board of Directors Meeting December 18, 2004
Treasurer's Report 2004
2004
Nov - DecDick Barth synopsis of presentation by Ron Payne, WA6YOU, "Improvised Antennas"
Dick Barth synopsis of presentation by Steve Cerwin, WA5FRF, "BPL Measurements"
Sep - OctAndré Kesteloot, N4ICK, "Calibrating your Receiver S-meter"
Dick Barth synopsis of presentation by Tom Lauzon, KI4AFE, "RF Safety"
Jul - Aug Hal Feinstein, WB3KDU, "First Steps in Python for the Radio Amateur"
Paul Rinaldo, W4RI, "Call for Participation in AMRAD's Vehicle Project"
André Kesteloot, N4ICK, "Of This and that"
May - JunAlan Melina, G3NYK, "A Possible Way of Forecasting Good Radio Propagation Conditions on 136kHz"
ARRL, "FCC proposes wide-ranging changes to Amateur Service Rules"
ARRL, "FCC okays RF Identification tags at 433.5 to 434.5 MHz"
ARRL, "ARRL Technology Task Force Forum Set for Hamvention 2004"
André Kesteloot, N4ICK, "Digital Radio Mondiale on the Cheap"
Mar - AprDick Barth synopsis of presentation by Hal Feinstein, WB3KDU, "Python: A Computer Language"
Tom Azlin, N4ZPT, "Concept: Automatic BPL Monitor"
Jan - Feb"AMRAD Annual Meeting, December 11, 2003"
"Pictures from new AMRAD Repeater site at Tysons Corners"
André Kesteloot, N4ICK, "Operating Relays on 1/2 Their Rated Voltage"
Foundation for Amateur Radio solicits Scholarship Applications
2003
Nov - DecJohn Champa,K8OCL, Gerry Creager,N5JXS, Ron Olexa,KA3JIJ, "HSMM Microwave Digital radio"
22nd ARRL and TAPR Digital Communications Conference
Sep - OctAndré Kesteloot, N4ICK, "BPL in Maryland"
Frank Gentges, KØBRA, "AMRAD HomePlug Test Bed"
Jul - Aug André Kesteloot, N4ICK, "A 16-Pole Audio Filter?"
Dick Barth synopsis of presentation by Ron Payne, WA6YOU, "Antenna Construction Made Easy: A 440MHz J-Pole"
André Kesteloot, N4ICK, "European NDB Lists"
FCC Actions: NOI on BPL, NPRM for unlicensed devices
May - Jun Dick Barth synopsis of presentation by Maitland Bottoms, AA4HS, "From Internet to RF Nets: Software and Amateur Radio"
Ian, G3ZHI, "Internet Radio Linking Project"
Mar - AprDick Barth synopsis of presentation by Jim Howland, MITRE, "Wifi: 802.11 Protocols"
André Kesteloot, N4ICK, "The I5TGC LF-Preamplifier Redux"
Minutes of AMRAD Board of Directors Meeting January 11, 2003
"AMRAD Annual Meeting, January 9, 2003"
Jan - FebMinutes of AMRAD Board of Directors Meeting December 21, 2002
Correspondence on AMRAD's Tacos Server
Paul Rinaldo, W4RI, "LF News"
André Kesteloot, N4ICK, "A Very Low-Power 136 kHz Test Transmitter"
News from the IARU Region 1 Conference
"New Video Coding Standard Delivers Major Advances in Image Quality"
"ARRL High Speed Multimedia Web Site, www.arrl.org/hsmm"
2002
Nov - DecFrank Gentges, KØBRA, "LF Network Analyzer"
Charles W. Rhodes, "Digital Television (DTV) Briefing to AMRAD"
Sep - OctA. Maitland Bottoms, AA4HS, "Internet Remote LF Receiver"
Jul - Aug Paul L. Rinaldo, W4RI, "AMRAD HF Flexible Loop Antenna"
May - Jun Frank Gentges, KØBRA, "AMRAD LF Noise Generator"
Apr-MayM Johnston via Alan Melia, G3NYK, "A History of Rugby Radio"
Jan - FebAndré Kesteloot, N4ICK, "A Remote LF Receiver"
Paul Rinaldo, W4RI and George Lemaster, WB5OYP, "Amateur Digital Voice Debuts"
Paul Rinaldo, W4RI, "Digital Voice Bibliography"
2001
Nov - DecFrank Gentges, KØBRA, "The AMRAD LF Upconverter Project"
Sep - OctOlivier Ernst, F5LVG, "A Simple Frequency Stabilizer"
Frank Gentges, KØBRA, "AMRAD LF Toolbox Concept"
Jul - Aug Paul Rinaldo, W4RI, "On Digital ATV"
Frank Gentges, KØBRA, "Volna K Review"
Dick Barth synopsis of presentation by James Howland, "Bluetooth"
George Lemaster, WB5OYP; Terry Fox, WB4JFI; Paul Rinaldo, W4RI, "Digital Amateur Television"
May - Jun Frank Gentges, KØBRA, "Unraveling the dBm at LF"
Dick Barth synopsis of presentation by Dr Robert Fontana, "Ultra-Wideband Technology"
Frank Gentges, KØBRA, "Early Intermodulation History"
André Kesteloot, N4ICK, "LF Notes"
Mar - AprDominique Delerablée, F1FRV, "Interface for use with Packet Modems"
Jan - FebDominique Delerablée, F1FRV, "Interface for Connection between Modems and Transceivers"
André Kesteloot, N4ICK, "LF Notes"
André Kesteloot, N4ICK, "Book Review: The RSGB's Low Frequency Experimenter's Handbook"
Bob Bruhns, WA3WDR, "Book Review: Digital Audio Processing"
Bob Bruhns, WA3WDR, "Reducing FSK Bandwidth with GMSK"

Last modified: November 28, 2014 by W4KRL