Links to Other Sites


How I do my Schematics

I use the evaluation version of Circad at http://www.holophase.com/. The owners of Circad are ham radio operators and there is a discount for Amateur Radio Operators who want their product.

An Italian ham loved the product so much that he wrote a set of introductory instructions for using Circad. The instructions are at http://www.geocities.com/SiliconValley/Park/6614/eciridx.html. The schematic instructions are Lesson 1.

For ARRL standard schematic symbols, download the libraries at Circad's Library Exchange. Cash Olson's libraries have all the ARRL standard symbols.

To publish a schematic, go to "Print Out", check "BMP to disk", Color Depth - 1-bit B/W, with a Scaling Factor of 100 to 200. The scaling factor will determine how large the schematic will be. The .bmp image is then converted to a one color .gif file. Most image/picture programs will convert .bmp to .gif. If you need help with a conversion program, send me an email.

Amateur and Short Wave Radio Experimenter's Web Site

VE7BPO has a great selection of homebrew projects and technical information. A "must see" site.

Ugly Construction Information

Gives detail information on using "dead bug", "ground plane", or "ugly" construction for your projects. The easiest and quickest way to build up a circuit and works better or equal to any other type of construction.

The method consist of the following: A ground plane fabricated from scraps of copper clad circuit board material, Grounded components soldered directly to the ground foil with short leads, Some non-grounded parts soldered to and supported by the grounded components, Other non-grounded components supported with suitable "tie down points" consisting of high value resistors.

"Manhattan Building and Advanced Manhattan Building"

Manhattan Style Construction - Glued Copper Traces on Printed Circuit Board. Chuck Adams has two .pdf files that cover almost all the techniques of homebrewing circuits including Manhattan Style Construction.

Morse Code has a mystique to it, it is an extremely cool method with which to communicate. In this Beginner's Guide to Making CW Contacts I am going to try and give those hams new to CW a better idea of how to start. How to find someone to talk with, what to talk about, how to deal with QRM, how to end a CW contact, how to get lots and lots of QSL cards, and much more useful and practical information.

A manual for learning, using, mastering and enjoying the International Morse Code as a means of communication. A .pdf file written by William G. Pierpont, N0HFF. Very complete.

Try Sending Morse Code with the Key! Touch your mouse to the knob of the telegraph key and then wait for the sound file to finish loading. After that, you can type a short phrase into the box and click "Morse", or manually send code by just touching your mouse to the knob!

Telecommunication is defined as the science of technology of communication over a distance. This site covers the prehistorice era, 6th century BCE: Mail, 5th century BCE: pigeion post, heliographs, flag semaphore, first telephone, optical telegraph, electrical telegraph, telegraph cable, photophones, wireless telegraphy, etc., all the way to 2003 VoIP Internet telephony. Get a great history lesson. Link submitted by Ms. Jenny Miller.

Very good tutorials on how to solder. If you are a beginner, you must go to these sites and learn how to solder correctly.

How to Solder

Help on Soldering

Electronic Construction from A to Z - Soldering 101

The Basic Soldering & Desoldering Guide, by Alan Winstanley

The Basic Soldering Guide Photo Gallery

Free instructional videos for proper soldering on printed circuit boards.


HF Core Information from CWS Bytemark - Ferrites & Iron Cores

Electronic Construction from A to Z

"Hearing CW in Noise"

Almost Digital Electronics logo

Neil has a frequency display that works great with my radios. Neil's article is in the May 1997 issue of QST. Check out DFD1 information and DFD2 information on this site.

He has a great links page, I can't do any better than what he has put together, Click Here to check it out.

Very prompt and extremely nice to work with.

The nearly 11,000 members of QRP ARCI, a non-profit organization, are dedicated to the increasing enjoyment of QRP operation and experimentation, and to the promotion of local and regional QRP Clubs throughout the world.

QRP ARCI publishes the QRP Quarterly, considered by many to be equal in quality to the ARRL organ, QST. Humor, technical articles by the best authors in the ham community, and contest results in a very attractive package.

No Dues, No Rules, Just Fun - and if we don't like it we fix it!

CW Operators' QRP Club Inc.

Maintains the "NEW Crystal Swap Page", Lo-Key Magazine, Boomerang Circuit Books, Australian QRP Day Contest, and the Milliwatts Per Kilometre Award - plus more. An Australian QRP Club.

Dedicated to the hobby of QRP - Amateur Radio communications with very low power. The content and maintenance is shared by those of us who are devoted to QRP.

The NorCal site has kits for sale and a lot of very interesting articles for the QRP crowd.

American QRP Club logo

The American QRP Club is for builders, experimenters, ham radio operators, and low power enthusiasts.

G-QRP Club has tons of information for homebrewers and QRPers. Publishes the SPRAT magazine. Kits, technical information, and a great list of homebrew web sites.

Web Controlled Shortwave Receiver

Listen to a Drake R8 receiver on the web.

Major Edwin Howard Armstrong Memorial Radio Club, W2XMN

Edwin H. Armstrong - Armstrong documents and artifacts

DataSheet4U is a free electronic engineering tool that enables you to locate product datasheets from hundreds of electronic component manufacturers worldwide.

Largest free electronic parts search engine on the web. 150+ Million electronic parts. Parametric search for every product line.
http://www.icmaster.com/search/HomePageAction.ad

Other Receiver Projects and Receiver Information on the Internet

Small-Signal RF Design with Dual-Gate MOSFETs Motorola Semiconductor application note AN-478, prepared by Brent Trout, Applications Engineering. A .pdf file.

Who Really Invented the Transistor at the Bell Labs Memorial website. Did we actually get the transistor from the Roswell alien spacecraft? Very interesting information on early crystal detectors using two cat whiskers and a battery with 3dB gain.

Hans Summers' web site has the most complete collection of "Huff and Puff" frequency stabilizer articles on the internet. Check out his HF Receiver, a polyphase direct conversion receiver. The receiver uses an FST3253 Tayloe switching mixer, a Franklin VFO using a 74HCT04 with a magnetically coupled Huff & Puff stabilizer, and a lossless 8-column polyphase audio network.

AADE Filter Design and Analysis V 4.03 AADE Filter Design is sensibly priced at only FREE. This program will blow the socks off many commercial programs costing hundreds of dollars. For information on the program.

"Welcome To OpAmp Electronics" OpAmp Electronics delivers a series of free, comprehensive, and detailed tutorials of the basic fundamentals of electricity and electronics authored by Tony Kuphaldt. Among the 59+ chapters on DC, AC, Semiconductor, and Digital theory to guide you through your studies or electronic projects, please feel free to navigate the different segments of our site for additional electronics assistance.

Custom Meter Faces - A Pictorial Instruction: An excellent tutorial on using Paint Shop Pro for making custom meter faces. Process can be used with other picture programs.

Plato products is a recognized world leader in the manufacture of high quality, long life replacement soldering tips and desoldering tips. They have tips for the Weller, Ungar, and a whole bunch more.

Class E AM Transmitter Descriptions, Circuits, Etc. - One of the major goals of the class E project is to facilitate the construction, by Amateurs with only a modest background in construction, of a high power, good sounding AM transmitter using modern, readily available components and at a reasonable cost.

The Accukeyer - "...circuit outlined here was updated from a QST article by James Garrett, WB4VVF, published in August 1973, and dubbed the "Accukeyer". K5ESE has done an excellent job of showing how to build this keyer plus updating the chips (HC) and output circuits with MOSFETs. I built mine many years ago with the old 7400 TTL chips and outputs with 300 V MOSFETs. It works fine and will key any rig. Has features that have been lost with the PIC keyers that help send perfect code.

An Experimenter’s Project for Incorporating the AD9850 Complete-DDS Device as a Digital LO Function in an Amateur Radio Transceiver, an Analog Devices Data Sheet, AN-557 APPLICATION NOTE

Jim, WA6OTP, has recently released a new PTO VFO kit. Very reasonably priced. I highly recommend any of his kits. Also, check out his other kits and crystal radio book.

A for SWL Reception, A great easy-to-build loop for 2 to 20 MHz SWL reception. A good antenna for the SWL build of the Electroluminescent Receiver Kit. Excellent nice looking web site by KR1ST.

"Radio Receivers" book from crystal set to stereo, on-line. Covers every aspect of radio receivers and is a good beginners book, all on-line and free to read.

From Transmitter to Antenna - High-frequency power transmission. By David Knight. Online book.

"Stable Transistor VFO's", a classic article written by Jim Fisk in Ham Radio Magazine on June 1968. Gives the history of the Seiler and Vackar circuits and a few circuit diagrams that will work even today very well. Uses both PNP and NPN transistors and a lot of very useful information on using both the Seiler and Vackar VFOs.

Phil's Old Radios - Antique radios and memorabilia, with photos and commentary.

Shortwave Stations on the WWW

Leon Heller's, G1HSM, web site has information on crystal ladder filters, direct conversion receiver module, and Chris Trask's super mixer.

Chris Trask's web site. Interesting. Example: "High Efficiency Broadband Linear Push-Pull Power Amplifiers Using Linearity Augmentation"

Aleksander Stari's, S56AL, web site has a collection of quartz crystal ladder filters and a DDS/PLL based universal synthesizer.

Ham Radio Online's collection of "Online Web Receivers".

Ulrich L. Rohde's, KA2WEM, article in QEX, October 1994 "Designing Low Phase Noise Oscillators" at the ARRL web site. A .pdf file that requires the Acrobat reader.

Ceramic Resonators for Cheap and Cheerful VFOs - This may make crystal VXO's, DDS VFOs, and "Huff and Puff" stabilizers obsolete. Check it out, very interesting.

"Synchronous Detection of DSB and ISB Signals", By Peter C. McNulty, WA1SOV May 2, 1999

A Fairchild FST3125 used as high-level mixer

Frequency Counter/VFO Stabilizer

Dale, W4OP's incredible homemade receiver pictures. Very nice.
http://www.parelectronics.com/pics/W7ZOI11%20copy.jpg
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Magnetic energy absorber material: Custom RF and Microwave Shields for use as * Mode/Harmonic Suppression * Microwave Absorber * EMI/RFI Shielding * Waveguide Loads * Radar Absorbing Material. Can also be used to find stray oscillations in prototype HF circuits.

RF Design Tutorial Manual from the Philips Semiconductor web site. A 64 page manual. Long download time, 2.29 meg.

"Crystal Sets to Sideband", by Frank W. Harris, K0IYE, A Guide to Building An Amateur Radio Station. The page has links to .pdf files in which the book is written. For the beginner to curious experienced.

Black Cat Books - a British source of old radio, wireless, television, electrical, electronic and other (technical) books and pamphlets with free knowledgeable advice relating to them.

HamCalc, Painless Math for the Radio Amateur, by George Murphy, VE3ERP. Every conceivable math program and calculator for filters, antennas, formulas - you name it. Available at the CQ Magazine site.

AA0ZZ IQ-VFO Kit
A High-Performance HF VFO using the AD9854 DDS IC
, from the American QRP Club

NOPPP, the "No-Parts" PIC Programmer A cheap and simple programmer for the 16CF84 by Michael Covington.

K8IQY's "Manhattan Madness" Project Page A repository for information developed during the design, construction, and testing of ham radio oriented projects.

United States Navy Electricity & Electronics Training Series - NEETS* - This series provides beginners with fundamental electrical and electronic concepts through self-study. The series is designed to give small amounts of information that can be easily digested before advancing further into the more complex material.

Toroid Winding Machine - only $20,000. From China

Baluns: What They do And How They Do It The definitive balun article.

SPECTRUM ANALYZER & TRACKING GENERATOR Design by W7ZOI and K7TAU as built by VE3JC, using KANGA US kit.

Receiver and Transceiver Information

AA3SJ says, "...the purpose of these pages is to encourage those who might want to construct the receiver, and to provide information regarding our design." Wes Hayward, W7ZOI, and John Lawson, K5IRK, "A Progressive Communications Receiver," QST, November 1981, Page 11. Original article at ARRL website: A High Performance Communications Receiver

No Excuses 40 Meter QRP Transceiver, Dec 2002 QST, by Dan Metzger, KC5WA takes you through a pictorial on how he built this transceiver which advertises "no special parts required".

The CDG2000 Transceiver A high performance HF transceiver or more correctly a high performance receiver with a fairly standard transmit capability.

THE BASICS OF RADIO SYSTEM DESIGN This paper is intended to give an overview of the design of radio transceivers to the engineer new to the field.

A Receiver Evolves:- My New 7MHz Valve Receiver (mainly for AM work), by VK2BA, David Macnaughton

Improved Dynamic-RangeTesting By Doug Smith, KF6DX

"A One-Chip Receiver Front-End", by Joseph Carr. From Alan McChesney's, N2ZHS, web site. An article on how to use the NE602.

Information on the HBR Receivers, 12 volt tube regens, R-390A, AC-100 receiver kit and more. Check out the web Site for K5BCQ.

At KD1JV's QRP web site is a 4053 Based 40M Receiver. He also has some kits for the QRP crowd.

EI9GQ Homebrew Radio Pages very interesting Receiver Building Blocks.

Santiam 40 Meter DC Transceiver Field expedient size, Good AF filtering, Stable VFO with a limited tuning range, Built-in PIC keyer with sidetone, 1-2 W of output power

K5AM Homebrew transceiver

The ARRL's Building Equipment site. Several receiver projects in .pdf format.

AA3SJ's "The Wheatstone Bridge Regenerative (WBR) Receiver" web page. And his "Progressive Communication Receiver" page.

Homemade 20M SSB Transceiver and a homebrew encoder for digital VFO knobs.

A picture story of building a Direct Conversion receiver, by Bill Linn, W7WEL.

An amazing list of radio receiver construction projects. "The Ingenious Circuits of Sir Douglas Hall", articles from The Radio Constructor 1962 to 1980 and Radio Bygones 1990 to 1999. Very interesting site.

Low cost AM SWBC Radio The radio can be built for about $15.00. Uses a voltage tuned R/C oscillator, which is part of a 74HC4046 Phase Lock Loop chip.

Presentation of the NC2030 CW-transceiver of Dan Tayloe, N7VE A high performance, low power, image rejecting DC transceiver for either 20 or 30m using the Tayloe product detector. A revised version of his presentation held at the Pacificon 2004.

12V "Space Charged" Tubes Receiver projects using 12 Volt tubes and information on the 12V tubes.

Dynamic Range Data Chart of most of the current commercial receivers. Includes both 20 kHz and 2 kHz spacing.

The ARS QRP Lab Reviews the Elecraft K-2 Transceiver. Many of our receiver test reports use bar charts that compare the unit being reviewed to a number of other HF transceivers.

Magnetic Loop/Long Wire/Dipole Antenna Information

Long Wire and Dipole Antenans for ham radio Featuring 50 links. One of the best link sites for antenna information I have found.

Magnetic Loop Antenna Experiments, by Jeff Imel, K9ESE

A Magnetic Loop for SWL Reception, A great easy-to-build loop for 2 to 20 MHz SWL reception. A good antenna for the SWL build of the Electroluminescent Receiver Kit. Excellent nice looking web site by KR1ST.

Felix Meyer's site - Magnetic Loop Antenna = Mag-Loop, Small Transmitting Loop

Small Transmitting Loop Antennas

Magnetic Loop Antennas for HF & Above

Magnetic Loop Antenna A simple multi-band magnetic loop antenna designed for 20, 30 and 40 meters.

Antennas, Service and Education L. B. Cebik, W4RNL, web site. Considered the best antenna site on the internet. Must see site!

PCB Information

The Largest and Best Collection of CAD Shareware, Freeware and Free Trial Software

pcb: Definition and Recommended Links, a site that includes links to everything about printed circuit boards.

Free instructional videos for proper soldering on printed circuit boards.

CADSTAR Express - FREE CADSTAR 7.0 PCB Design Software Limited to 300 pins and 50 components and must have Windows XP and minimum 1 GHz processor.

Spice Software, Filter Software and Calculators

G4FGQ's Software - Original, high-quality, radio engineering/modelling programs. Not freeware -- just free gifts -- please help yourself -- no catch. A lot of antenna, matching, and toroid/solenoid coil programs.

Software for Amateur Radio - Dedicated to provide the Amateur Radio community with software free of charge. A mini Ring Core Calculator 1.2, mini dB Calculator 1.3.2, R Color Code 1.0 and more.

B2 Spice v.5 - B² Spice v.5 is the easiest, most user-friendly Spice program on the market. Demo available.

SIMetrix - An enhanced SPICE based mixed signal simulation program with integrated schematic entry and waveform viewer. Available for Windows and Linux platforms. Download Free SIMetrix/SIMPLIS Intro

SPICE OPUS light - Spice with integrated optimization utilities. Free

The Spice Page - SPICE originates from the EECS Department of the University of California at Berkeley. This page provides manual pages, a user guide, and example runs for the Spice3f version of the program.

PSpice Tutorials - Very complete tutorials.

AppCAD Version 3.0.2 - RF design software that is provided free of charge by Agilent Technologies as a service to the RF and microwave design community.

SwitcherCAD Software - free spice program.

AIM-Spice - Automatic Integrated Circuit Modeling Spice (AIM-Spice) is a version of SPICE, the most popular analog circuit simulator. AIM-Spice is a new version of SPICE running under the Microsoft Windows and Linux operating systems. AIM-Spice for Windows is capable of displaying graphically the results of a simulation in progress, a feature that allows the operator to terminate a run based on an instant information on intermediate simulation results

5Spice - a new graphical user interface that wraps around a traditional Spice simulation engine, presenting a single application to the user. It offers easy to use analog circuit simulation for the typical circuit designer.

WinSpice - WinSpice is a port of Spice3F4 to Win32 systems. WinSpice is ported to run in a window as a native 32-bit application. It can generate waveform plots to individual floating windows and contains a powerful scripting language. It contains several enhancements over the original Berkeley Spice3F4.

SuperSpice - SuperSpice has been specifically designed for use as an analogue/mixed-mode simulation tool by practicing analogue engineers, for analogue engineers. SuperSpice therefore avoids some of the compromises that often occur when schematic captures are designed by software engineers. Trial version available.

Circuit Sage - a complete source of information to help you design great circuits fast.

AADE Filter Design and Analysis V 4.03 AADE Filter Design is sensibly priced at only FREE. This program will blow the socks off many commercial programs costing hundreds of dollars. For information on the program.

JavaScript® Electronic Notebook - consists of a group of JavaScript® driven web pages that are intended for use as a quick reference for Ham Radio operators or just anyone interested in electronics. The Notebook is similar to other applications on the net, like HamCalc by George Murphy, VE3ERP, or a windows version of HamCalc on John Owen's, G4VWL, web site., but no downloading is necessary.

VE7CA's Design Utility - This RF Design Program is a tool that an amateur radio experimenter (homebrewer) should find helpful. Used to build the HBR2000 and includes a Bandpass Filter program.

RF Cafe - online calculators and a lot more. Wild site.

The Electrical Engineering Homepage - Schematics, tutorials, and online calculators.

Class E Power Amplifier Design

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Last Update: 1/14/10
Web Author: David White, WN5Y