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"

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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.
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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.
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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.