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• November-December

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  Contents

  Perspectives

• July/August

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  In This Issue

• September-October

  Contents

  Perspectives

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• May-June

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  Perspectives

• March-April

  0325_qex_cover.jpg Contents

  Perspectives

• January - February

  01_25_qex_cover.jpg Contents

  Perspectives

• November-December

  11_24_QEX_cover.jpg Perspectives

  Contents

• September-October

  09_24_qex_cover.jpg Perspectives

  Contents

• July-August

  07_24_jul_aug_cover.jpg Contents

  Perspectives

• May-June

  05_may_2024_qex_COVER.jpg Perspectives

  Contents

• March-April

  03_2024_QEX_cover.jpg Perspectives

  Contents

• January-February 2024

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  Contents

• November-December 2023

  2023_11_nov_dec_2023_cover.jpg Perspectives

  Contents

• September-October

  qex 09-23 COVER_1.jpg Perspectives

  Contents

• July-August

  07_qex_cover.jpg Perspectives

  Contents

• May-June

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  Perspectives

  Contents

• March-April

  2023_03_QEX_March_April_Cover.jpg Perspectives

  Contents

• January-February

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  Perspectives

  Contents

• November-December

  11_22_Nov_Dec_Cover.jpg Perspectives

  Contents

• September-October

  09_Sep_Oct_2022_Cover.jpg

  Perspectives

  Contents

• July-August

  07 July August 2022 cover_1.jpg Perspectives

  Contents

• May-June

  05_may_Cover_1.jpg Perspectives

  Contents

• March-April

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  Perspectives

  Contents

• January-February

  QEX 2022 Jan/Feb Cover

  Perspectives

  Contents

• November-December

  11_Nov_Dec_QEX_2021_cover.jpg Editorial

  Table of Contents

• September-October

  0921_Cover1.jpg Editorial

  Table of Contents

• July-August

  07_JulAug21_QEX_Cover1.jpg Editorial

  Table of Contents

  Free Article Amateur Portable Radios (Handheld Transceivers): Exposure Considerations Based on SAR, by Richard (Ric) A. Tell, K5UJU

• May-June

  QEX5_2021_Cover.jpg Editorial

  Table of Contents

• March-April

  0321_cover_image_Page_01.jpg Editorial

  Table of Contents

• January-February

  2021_jan_feb_qex.jpg Editorial

  Table of Contents

• November-December

  QEX November December Cover image_1.jpg

  Editorial

  Table of Contents

  Free Sample Article: The Story of the Broadband Dipole by Dave Leeson, W6NL

• September-October

  QEX_September_October_2018_Cover_image.jpg

  Editorial

  Table of Contents

  Free sample article: Amplifier Overshoot-Drive Protection by Phil Salas, AD5X

• July-August

  Editorial QEX_July_August_REVISED_Cover_image.jpg

  Table of Contents

  Free Sample Article: Adapt Your Equipment to Operate at Millimeter Waves up to 32 GHz by Euclides Lourenço Chuma, PY2EAJ

• May-June

  QEX_May_June_2018_Cover.jpg

  Editorial
  

  Table of Contents

  Free Sample Article: An Optimized Grounded Base Oscillator Design for VHF/UHF by Ulrich L. Rohde, N1UL and Ajay K. Poddar, AC2KG.

• March-April

  March_April_2018_QEX.jpg

  Editorial

  Table of Contents

  Free Sample Article: High-Power HF Band-Pass Filter Design by Jeff Crawford, K0ZR

• January-February

  QEX_January_February_2018_Cover.jpg

  Editorial

  Table of Contents

  Free Sample Article: A Tunable RF Preamplifier Using a Variable Capacitance Diode by George R. Steber, WB9LVI

• November/December

  QEX12_2020_cover.jpg Editorial

  Table of Contents

• September/October

  Sept_Oct_2020_QEX.jpg

  Editorial

  Table of Contents

• July/August

  July_August_2020_QEX.jpg

  Editorial

  Table of Contents

• May/June

  Editorial May_June_2020_Cover.jpg

  Table of Contents

• March/April

  March_April_2020_QEX_Cover.jpg

  Table of Contents

  Editorial

• January/February

  Table of Contents Jan_Feb_2020_QEX_Cover.jpg

  Editorial

• November/December

  Editorial QEX_November_December_2019_Cover_image.jpg
  

  Table of Contents
  

  Free Sample Article: Building an LDMOS Amplifier with an Arduino Interface by Michael L. Foerster, WØIH

• September/October

  Editorial QEX_September_October_2019_Cover_Image.jpg

  Table of Contents

  Free Sample Article: Patterns and Polarizations of Modestly-Sized Loop Antennas by Darrel Emerson, AA7FV; G3SYS

• July/August

  QEX_July_August_Cover.jpg

  Editorial

  Table of Contents

  Free Sample Article: Receiver Step Attenuator by Scott Roleson, KC7CJ

• May/June

  QEX_May_June_2019_Image.jpg

  Editorial

  Table of Contents

  Free Sample Article: An Unusual Multi-Band WSPR Transmitter by Dr. George R. Steber, WB9LVI

• March/April

  Editorial

  Table of Contents

  Free Article: "Baseband Quadrature Multi-Band Modulator" by Braddon Van Slyke, AC0ZJ

  QEX_March_April_2019_Cover_Image.jpg

• January/February

  QEX_January_February_Cover_image.jpg

  Editorial
  

  Table of Contents
  

  Free Sample Article: Wide Dynamic Range Field Strength Meter by Thomas Alldread, VA7TA

• November/December

  QEX_November_December_2017_Cover_image.jpg Editorial

  Table of Contents

  Free Sample Article:

  All-Pass Networks in a Speech Chain

  by James L. Tonne, W4ENE

• September/October

  QEX_September_October__2017_Cover_image.jpg

  Editorial
  

  Table of Contents

  Free Sample Article: The MSK144 Protocol for Meteor-Scatter Communication by Steven J. Franke, K9AN

• July/August

  QEX_July_August_2017_Cover_image.jpg

  Editorial

  Table of Contents

  Free Sample Article: Automatic Tracking Filter for DDS Generator by Riccard Gionette, I0FDH

• May/June

  Editorial

  Table of Contents

  Free Sample Article: Improve Performance of Your Octopus V/I Curve Tracer Using a Single Voltage Transformer by Paulo Renato F. Ferreira, PY3PRQEX_May_June_2017_Cover_image.jpg

• March/April

  QEX_March_April_2017_Cover_image.jpg

  Editorial

  Table of Contents

  Free Sample Article:

  The Polar Explorer by Brian Machesney, K1LI and Tony Brock-Fisher, K1KP

• January/February

  Our 300th Issue!QEX_January_February_2017.jpg

  Editorial

  Table of Contents

  Free Sample Article: Re-Purposing an Obsolete Instrument Enclosure by Scott Roleson, KC7CJ

• November/December

  Table Of Contents QEX_November_December_Cover_image.jpg

  Sample Article: How to Tune an L-Network Matchbox by Charles R. MacCluer, W8MQW
  

• September-October

  Table Of Contents QEX_September_October_2016.jpg

  Sample Article: "Crystal Test Oscillators" by Fred Brown, W6HPH

• July/August

  Table Of Contents QEX_July_August_2016.jpg

  Sample Article: Radio Frequency (RF) Surge Suppressor Ratings for Transmissions into Reactive Loads by Gene Hinkle, K5PA

• May/June

  Table Of Contents

  Sample Article: 6 m Monoband Conversion for Heathkit SB-1000 Amplifier by Ron Berry, WB3LHDQEX_May_June_2016.jpg

• March/April

  Table of Contents QEX_March_April_weepic_RGB_CORRECTED.jpg

  Sample Article: Elevation and Pseudo-Brewster Angle Formation of Ground-Mounted Vertical Antennas by Robert J. Zavrel Jr, W7SX

  Click here to view errata for the article "Calculation of FM and AM Noise Signals of ColpittsOscillators in the Time Domain" by Dr. Ulrich L. Rohde, N1UL.
  

• January/February

  Table Of Contents

  Sample Article: A Digitally Tunable Band-Pass Filter

  by Euclides Chuma, PY2EAJQEX_Jan_Feb_2016_Cover.jpg

  QST Companion Article: External Processing for Controlled Envelope Single Sideband

  by David Hershberger, W9GR

  Letters

  2015 Index

• November/December 2015

  QEX_Nov_Dec_2015_Cover.jpg

  Table of Contents

  Sample Article: A Frequency Standard for Today's WWVB
  

  By John Magliacane, KD2BD

  This article as printed in QEX has several errors on the schematic diagrams of Figures 7, 12B, 13. and 16. The corrected drawings are included in the article posted here.

• September/October 2015

  QEX_Sept_Oct_2015_weepic_RGB.jpg

  Table of Contents

  Sample Article: Quality Factor, Bandwidth, and Harmonic Attenuation of Pi Networks,

  By Bill Kaune, W7IEQ

  Letters

• July/August 2015

  Table of Contents QEX_July_August_weepic_RGB.jpg

  Sample Article: "An Arduino Controlled GPS Corrected VFO"

  By Gene Marcus, W3PM / GM4YRE

• May/June 2015

  Table of Contents QEX_May_June_2015_Cover_RGB.jpg

  Sample Article: "25ドル 10 GHz Signal Generator"

  By Jeff Wadsworth, KI5WL

• March/April 2015

  QEX_March_April_2015_Cover.jpg

  Table of Contents

  Sample Article: An Experimenter's Variable Voltage Transformer

  By Ted Drell, W5HEU

• January/February 2015

  QEX_Jan_Feb_2015_Cover.jpg

  Table of Contents

  Sample Article: A Low Frequency Adapter for your Vector Network Analyzer (VNA)

  By Jacques Audet, VE2AZX

  2014 Index

• November/December 2014

  Table of Contents QEX_11_14_Cover.jpg

  Sample Article: Controlled Envelope Single Sideband

  by David L Hershberger, W9GR

• September/October 2014

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  Table of Contents

  Sample Article: Hands On SDR by Scotty Cowling, WA2DFI
  

  Letters

• July/August 2014

  Table of Contents QEX_July_Aug_2014_Cover.jpg

  Sample Article: An RF Filter Evaluation Tool by Gary Richardson, AA7VM

• May/June 2014

  QEX_May_June_2014_Full_Cover_RGB.jpg

  Table of Contents

  Sample Article: RF Power Amplification Using a High Voltage, High Current IGBT, by Pete Horowitz

• March/April 2014

  QEX_March_April_2014_Cover.jpg

  Table of Contents

  Sample Article:"An 8 Channel Remote Control Antenna Selector," by Michael Dzado, AC0HB

  Letters

• January/February 2014

  QEX_Jan_Feb_2014_Cover_image.jpg

  Table of Contents

  Sample Article "A Software Based Remote Receiver Solution," by Martin Ewing, AA6E

  Letters

  2013 QEX Index

• November/December

  QEX_December_2013_weepic_RGB.jpg

  Table of Contents

  Sample Article An Automated Method for Measuring Quartz Crystals by Richard Harris, G3OTK

  2013 QEX Index

• September/October

  Table of Contents QEX_Sept_Oct_2013_image.jpg

  Sample Article: A 21 MHz Four Square Beam Antenna

  By Garth Swanson, G3NPC

  Companion QST article: A 21 MHz Four Square Beam Antenna

• July/August 2013

  QEX_July_Aug_weepic_RGB.jpg

  Table of Contents

  Sample Article: The HF7070 HF/LF Communications Receiver Prototype

  by Colin Horrabin, G3SBI

  I apologize to Gary Richardson, AA7VM, author of the "cover article" in this issue for having his call sign wrong on the cover and in the "About the Cover" box on the Table of Contents page in the printed magazine. Gary's call is correct in the cover image posted here, as well as on the Table of Contents PDF file. -- Larry Wolfgang, WR1B.

• May/June 2013

  Table of Contents QEX_May_June_2013_weepic_RGB.jpg

  Sample Article: A Simple Yet Precise Function Generator for the Experimenter

  by Rubens Fernandes, VK5FE