How I do my SchematicsI use the Clomid online pharmacy 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. 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. |
"Manhattan Building and Advanced Manhattan Building"Manhattan Style Construction - Glued Copper Traces on Printed Circuit Board. Chuck Adams has a Lab Notebook that covers 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.Very good tutorial on how to solder. If you are a beginner, you must go to these sites and learn how to solder correctly. |
 Neil passed away and his site has been taken down. But I have information and building information on my site. Check out DFD1 information and DFD2 information on this site. |
 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. |
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No Dues, No Rules, Just Fun - and if we don't like it we fix it!
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The NorCal site has kits for sale and a lot of very interesting articles for the QRP crowd.  The North American QRP Club is for builders, experimenters, ham radio operators, and low power enthusiasts. |
 Ham Radio Online's collection of |
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DataSheet4U is a free electronic engineering tool that enables you to locate product datasheets from hundreds of electronic component manufacturers worldwide.
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VE7BPO's QRP/SWL Homebuilder RF - Test and Measurement Homepage - This site went off line and this a .pdf of his old site with lots of homebuilding information.
Selected History Receiver Inovations Over Last 100 Years Part 1 Selected History Receiver Inovations Over Last 100 Years Part 2 Amateur Radio and Emergency Communications 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. This is the last known release of AADE's filter design application for Windows. 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 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. "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. 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. A Fairchild FST3125 used as high-level mixer Frequency Counter/VFO Stabilizer Dale, W4OP's incredible homemade receiver pictures. Very nice. 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. 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. 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. Baluns: What They do And How They Do It The definitive balun article. Receiver and Transceiver InformationAA3SJ 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, N0KSF takes you through a pictorial on how he built this transceiver which advertises "no special parts required". |
