Amateur Radio Links

• My friend Matt, KK5DR's website - amplifier-related articles
• Articles on radio history and other topics by my friend Brian Austin GØGSF (ex-ZS6BKW)
• My friend and ex-colleague Frank, KJ4CKP's website
• My friend Walter, VE7WRS' new website
• Collectors: Visit Bruce, K1XR's Collins & Drake page
• Jed, N1JBC's Page
• Hans, PA1HR's Website
• Greg, W8WWV's Site
• Bill, W2CQ's Website
• Dennis, ZS1AU's Page
• Markus, VE7CA's Website
• Bill, K4FX's Website
• Jeff Smith, VE1ZAC's  Website
• David, VA7DXC's Website
• Rob, PA3EKE's Website
• Martin Ehrenfried G8JNJ's interesting and varied site
• Kurt Hoffelner OE3HKL's Website

• Get acquainted with our local club - the North Shore Amateur Radio Club
• ARRL - American Radio Relay League
• RAC -Radio Amateurs of Canada
• Island HF Radio Association
• IARC - Israel Amateur Radio Club
• ITU Radio Club
• RSGB - Radio Society of Great Britain
• DARC - Deutscher Amateurradio-Club
• SARL - South African Radio League
• SFDXA - South Florida DX Association
• UKSMG - UK Six Metre Group
• The K9YA Telegraph
• eHam.net

• ICOM America Home Page
• YAESU Home Page
• Doug,VA3CR's authoritative FT-1000MP Site
• Bill N4ATS' Yaesu FL-7000 Site
• The Fox-Tango Group
• KENWOOD Home Page
• Collins HFS-2200: Manual  Background
• FlexRadio Systems Home Page
• Tokyo Hy-Power Product Manuals
• Sunair Electronics LLC - military and commercial radio communications
• Rohde & Schwarz - Germany's radio communications, test and measurement leader
• JRC (Japan Radio Co. Centenary Commemorative Page
• Hilberling - a top German radio manufacturer
• KVG - a leading German manufacturer of quartz crystals, oscillators and filters
• CPI Communications and Power Industries - manufacturer of Eimac ® power tubes
• Circuit Design Inc. - radio modules
• ADAT ADT-200 - the Swiss direct-sampling HF/6m transceiver. View a presentation.
• Interesting accessories for your station: LDG Electronics Inc.
• PAR Electronics Inc. - antennas and RF filters
• Pacific TV - a good source for vacuum tubes, in Victoria BC
• Toronto Surplus & Scientific - an excellent Canadian resource for test equipment and surplus radio communications gear
• Prolex Design - another Canadian test-equipment resource, in Victoria BC
• Dick Byrd Enterprises - N4UQ's Alpha Amplifier Upgrade Site
• Hy End Fed Antennas - the ultimate portable wire antenna from The Netherlands

• Introduction to RF Design, by Rohde & Schwarz
• The Rebirth of HF: Rohde & Schwarz white paper
• Ulrich L. Rohde et al.: Low-Noise Tuning Diodes for Voltage-Controlled Oscillators
• Ulrich L. Rohde: Global Education Solution for RF Engineering
• Here is an excellent tutorial on Modulation Theory
• ICAS vs. CCS - safe operating power levels for transmitters
• Re-visiting RF Bioeffects (3 papers)
• Microwaves 101 - the #1 microwave info resource
• Bell System Technical Journal Archives, 1922 - 1983
• "Voltage" and "power" dB's getting to you? Read George, W5YR's "Treatise on the Decibel"
• Read an excellent white paper and Web page on Software Defined Radio (SDR)
• Of general interest to Hams and SWL's: RadioIntel.com
• A marvellous electronics information resource: One Electron
• List of BBC Research Reports (1960's, 1970 - 1996, PDF)
• The Audio Systems Group - including RFI information (PDF)
• Richard Measures' Amplifier Site
• Don, AA5AU's RTTY Page
• G3SEK's Amateur Radio Technical Notebook
• Introduction to Quartz Crystal Resonators (DigiKey/Crystek Tutorial, 15 min.)
• Quartz Crystal Theory (Jauch Quartz GmbH, Germany)
• Quartz Crystal, Oscillator & Filter Technology (KVG, Germany)
• G8WPW's Microphone Connections Page
• Markus Hansen VE7CA's Test Bench, including HP 8640B Signal Generator
• The RigPix Database
• Sci.Electronics Repair FAQ Pages - very useful electronics repair info
• Looking at HF amplifiers? Read about solid-state designs.
• HF Linear Amplifiers - basic concepts, types & operation
• Is a Class-A PA such a great idea? Perhaps not...
• Speech compression in SSB radio systems
• Whistle to Aah Ratio – Is it important?
• VK1OD's Technical Site - many fine articles, including useful calculators
• FM, Land-Mobile Radio and the Amateur Radio Service – a brief history
• Amateur Radio Application of Frequency Modulation by VK1OD
• The Future of SSB in a Digital Voice Environment
• DSP in HF Radios
• The Scientist and Engineer's Guide to Digital Signal Processing
• Watkins-Johnson Technical Publications on classical RF and broadband wireless topics
• Icom IC-756Pro3 vs. IC-756Pro2
• Analog-to-Digital Converter Considerations, by Andrew Roos ZS6AA
• MFSK - a new HF datacom mode
• Rig Power Supplies, by John White VA7JW - an excellent overview of power-supply technology
• Some common-sense rules for ensuring long PA life
• The H-Mode Mixer Page by PA3AKE
• Bob Burns G3OOU's Website
• G3YNH.info - David Knight's Website
• CPI Power Grid Device Library - Econco & Eimac Tubes
• A masterly treatment of SSB compression - by Mike Perks ZS6BIM
• Guidelines for Noise Suppression with the Yaesu Quadra, by Peter Jackson VK6KXW
• Henry 2K-4 Amplifier QSK Modification - by NE7X
• Oscillator Phase Noise: A Tutorial
• G4WPW Microphone Connections Page
• The K6STI Website
• Dave, AA6YQ's DXLab Software Suite
• FT8, by Sal KM6JD
• Larry Benko, W0QE's Website
• OK1RR's Front-End Saver - a protection switchbox for a transceiver's RX-ANT input
• G0MRF Projects
• G0MRF 2.4 GHz source
• Electropaedia - Electrical Energy & Battery Technology
• Archive of service manuals

• VOACAP Online Coverage and Point-to-Point Predictions - the user-friendliest VOACAP version yet!
• VOACAP Quick Guide
• Rohde & Siwiak, Some Thoughts on Portable and Tunable Mobile and Small Loop Antennas
• Rohde, Salazar-Palma & Sarkar, Electrically Short Antennas
• Hertzian and Fitzgerald Dipoles
• Tuning Electrically Short Antennas for Field Operation     mirror
• Antenna tuners and couplers
• The Autotuner as Preselector
• Lossy, Mismatched Transmission Lines - relationship between line loss and VSWR
• Why you need a Current Balun, by John White VA7JW
• Theory of the ZS6BKW Antenna, by Brian Austin GØGSF (ex-ZS6BKW)
• Experimenters: Test-drive the W9CF Antenna Tuner Simulator
• The Beverage Antenna Memorandum
• Antenna and receiver noise figure
• ITU-R Recommendation P.372-13: Radio noise
• Antenna Lightning Protection - an excellent document from PolyPhaser

• The Test & Measurement Page
• List of my User Reviews & Test Reports
• Absolute RF Power Measurement using simple techniques
• Introduction to Moderm Signal Generation by Dr. Ulrich bRohde N1DL (presented at Munich Defence University)
• Tektronix Poster: How to set up an oscilloscope
• dB or not dB?  R&S App Note 1MA68   mirror
• Not getting full SSB output? Run this simple PEP test procedure
• Noise Figure Measurement by KO4BB
• Noise Power Ratio (NPR) Testing of HF Receivers
• NPR Measuring System (Noise Generator) by OE3HKL
• Here is a useful dBm-volts-watts conversion chart (for 50Ω systems)
• Use the Bird® RF Calculator (requires MS Excel) from Bird Technologies Group.
• Here's a handy tip from Bob W9YA: Use your oscilloscope as a preamp for a counter
• Join the HP/Agilent/Keysight Test Equipment Group
• Phase Noise 101: Basics, Applications and Measurements by Keysight Technologies
• Docmesure - a French download site for test equipment manuals
• The Autotuner as Preselector (swept-frequency test)
• John Miles KE5FX's Website
• Clifton Laboratories - Jack, K8ZOA's website
• Repair and Recalibration of a Bird RF Wattmeter Element
• Igor, UN7GM's ARRL Transceiver Specs Summary
• Maximo EA1DDO's List of ARRL and Sherwood Transceiver Test Data
• Test of the Large Signal Behaviour of some 144 MHz Radios  - by DF9IC
• The Wenzel Associates Technical Library - from a leading manufacturer of precision crystal oscillators

• Emerging Trend in 5G, IoT and SDR by Dr. Ulrich Rohde N1UL
• R&S EK895/EK896 Receivers: User Manual
• Understanding receiver sensitivity in High Frequency (HF) Receivers – FlexRadio
• A superb resource on receivers: Leif Åsbrink SM5BSZ  mirror site
• Rob Sherwood NCØB's Receiver Test Data
• Sideband Noise in Oscillators, by Leif Åsbrink SM5BSZ
• Superhet Radio History, from "Electronics Notes"
• The Kongsfjord DX Homepage - including receiver data, reviews and articles
• Read George, W5YR's "Distribution of Gain and Selectivity in Multistage Receivers"
• Dave, N9EWO's Radio Receiver Website
• The Barlow Wadley XCR-30 Site
• All about Racal RA3701 and RA3712 Receivers
• Intermodulation, Phase Noise and Dynamic Range (PDF)
• Intermodulation Testing of High-Performance Receivers - by John Thorpe (AOR)
• Receiver Dynamics - basic HF receiver performance specs and testing
• Reciprocal Mixing - how phase noise affects selectivity
• Up or down conversion: that is the question...
• ADC Overload with Direct Sampling SDRs - Myths Debunked by Steve Hicks N5AC
• PA3AKE's Website (including high-performance H-mode mixers)
• PA3AKE's H-mode Mixer Page
• Design Considerations for the AOR AR7070 Receiver
• Up-Conversion Front End using H-mode Mixer by Colin Horrabin G3SBI
• The Fraunhofer IIS DT700 Direct-Sampling DRM Monitoring Receiver
• The Perseus Direct-Sampling HF Receiver
• Software Radio Laboratory LLC - the QS1R SDR Line
• RFSpace Direct-Sampling Receivers: SDR-14. SDR-IQ, SDR-IP, IF-2000 interface
• HF Receivers:  Part 1  Part 2   Part 3
• Saurier-Konzepte (Dinosaur Concepts) by Nils Schiffhauer  Deutsch  English  (PDF)
• Dutch SWL Eric Kramers NL777's interesting website
• SDR Handbook, 10th Edition (PDF)
• High-Speed Data Converters Make Direct-Sampling Receivers Practical (PDF)

• Build Paul, N2PK's Vector Network Analyzer (VNA) & HF Power/Return Loss Meter mirror site
• Fighting ground loops, hum, RF/audio feedback, etc.? Read Sound System Interconnection
• The Repeater Builders' Technical Info Site
• LTSpice - a free, SPICE-based circuit design tool from Linear Technology
• A passive-attenuator calculator (H and T pads)
• Mini-Circuits noise figure calculator
• Useful electrical and electronics calculators
• More calculators
• Markus Hansen VE7CA's HBR-2000 HF Transceiver
• EI9GQ Homebrew Page
• Auxiliary keying interfaces for Icom HF radios

• VA7OJ/AB4OJ's First Steps in Amateur Radio & Military Radio Links
• Beginnings (reprinted by kind permission of the K9YA Telegraph)
• Two Meters the Hard Way - converting an SCR-522 for ham use (reprinted by kind permission of the K9YA Telegraph)
• Radio Design: Military Signals to Morse Code (VA7OJ/AB4OJ Radio BVM interview at Burnaby Village Museum, 24 July 2013)
• S.P.A.R.C. Radio Museum, Coquitlam BC
• Green Radio Round-Up - military manpack sets for the Ham
• Matthew Kendall's Spilsbury SBX-11A Page (SBX-11A : 10W, 2 - 8 MHz, 4-channel crystal-controlled HF-SSB manpack)
• Hammond Museum of Radio
• Marconi Archive Online Catalogue - Bodleian Library, Oxford University
• Ian McLean - Collins
• Keith's Racal Page
• PA8PDP's Racal Pages
• Ian, GM0UHC's Racal RA.17 Restoration
• David Schofield's Radio Collection
• Jose, EB5AGV (Radio)
• Tactical Link Systems
• United States Early Radio History
• A History of the Collins Radio Company: WW2 to 1971
• IEEE Ultrasonics, Ferroelectrics & Frequency Control Society (IEE-UFFC): Historical Documents
• A History of the Quartz Crystal Industry in the USA, by V. Bottom (IEEE-UFFC)
• A History of Crystal Filters,by R.G. Kinsman (IEEE-UFFC)
• Influence of Ham Radio on the US Commercial Quartz Crystal Market, by Patrick Brown N7KRG (IEEE-UFFC)
• Cape Town's First Call - a fascinating account of early South African broadcasting (courtesy Ian Simpson VA7IS)
• Transatlantic Radio Telephony - Bell System Technical Journal 6/2, April 1927
• N3IBX Vortex Joe's radio museum
• HF Propagation & Clandestine Communications in WW2 by Brian Austin G0GSF (posted by kind permission of Radio Bygones)
• Geoff, WB6NVH's Historical Radio Site (LMR, mobile phones etc.)
• GMB's Vintage Technology Web Site
• GE "Ham News" - an excellent series of application notes, published from 1948 to 1963
• RCA "Ham Tips" - more application notes, covering 1938 to 1970
• An Archive of Vintage QST Articles
• Presentations given to the North Shore ARC:
• German WW2 Radio Technology
• German WW2 SIGINT/COMINT
• German WW2 Radar & Magnetron Note
• German WW2 ECM
• DSP in HF Radios
• Amateur Radio History - from Boat-Anchors to DSP (also given to IEEE ComSoc Vancouver)
• Tour of the Jodrell Bank Radio-Telescope
• HF Transceiver 101 - what's inside my radio?
• Ham Radio Friedrichshafen 2009
• Classicbroadcast.de - classic broadcast equipment in Germany
• An interesting resource on microphones

• Dave, G3VFP's Site
• IKØXCC's Site
• Rudi, ZS6DX's Site
• John, EI7BA's Website
• Jerry Proc, VE3FAB's Website, including Canadian Marconi
• Dick, PA3DUV's Website
• G4FTC's Website
• AA5TB's Website
• Manfred, XQ2FOD's Site
• Sergio, IK4AUY's Website  Newer, faster site
• Phil Salas AD5X Website - articles, reviews, projects etc.
• An Overview of Digital Modes
• The Heathkit Museum and Archive
• Ham Radio Equipment & Resources
• Ham Radio in the 21st Century - EDN
• Hampedia

Humour

• Haiku for a Fallen Radio Firm
• A revolutionary green technology for your home
• Click here to send me a corny joke
• A medical concern affecting many of us
• Powerhog!
• Where's the S-meter?
• My contest-avoidance switch
• My take on fan and relay sounds in the shack
• A "must-have" repair part for owners of British motor vehicles

Copyright © 2004-2022 A. Farson VA7OJ/AB4OJ. All rights reserved. Last updated: 26/11/2023