Projects & Documents Index ... Projects With Something to Offer The following links point to projects that have resulted in something to offer the amateur radio group. Sometimes I have printed circuit boards, sometimes only source code for PIC projects. In some cases it is only a document I have particularly useful. Basic Low Power "2m/70cm Diplexer", "PDF Document", PC board available Very large format "4x40 Densitron LCD", "Densitron LM4790BG-SNY Data Sheet" Misc Documents You May Find Interesting The following links point to an assortment of documents I have found to be interesting. Some represent projects I would build if time every allowed it.      Amateur Radio Stuff ... Information on wiring a "Rino Data Cable", PDF format • used on balloon packages. An "ATV Line Sampler", PDF format • April '95 ATCO Newsletter A "Blank Smith Chart", PDF format • IF you need one, your need one! A "Blank Log Sheet", Excel format • Cheaper than buying log books!      Proton Precession Magnetometer Stuff ... An article on "Proton Precession Magnetometers", by J.A. Koehler • Very interesting! Another article on "Proton Precession Magnetometers", by L. Huggard • Also very interesting! Antenna Projects I've Found Interesting I have always been fascinated with antennas and how the function. The following links point to various antenna ideas and projects I have collected over the years and found to be particularly interesting. Maybe you will as well. Arrows "Model J146/440" J-Pole, "PDF Format", thanks Allen Lowe A very cool & interesting "Sleeve Antenna Design" by ON4CFC, Pascal Veeckmans. An "8 Element ATV Quagi","PDF Format", a classic and cheap! An Interesting "2GHz Collinear", design method is applicable to other frequencies A document concerning "Patch Antenna Basics", interesting reading. Information concerning "Helix Antenna Design", compiled by me. A "Patch Driven Yagi", design equations, etc. A "Microwave Discone Antenna" whose design & contruction is simple. An interesting "Discpole Antenna" by Rick Littlefield. The "Windom Antenna" by G.E. "Buck" Rogers Sr., K4ABT. QRP Projects Since QRP (an amateur radio term meaning low power, typically 5 watts or less) operation is an interest of mine I have done some projects that are QRP related. The links below provide documentation for some of these projects. Going "QRP using the ALC" input on your transceiver, "PDF Format" PIC Based Amateur Radio Projects Microchips PIC line of microprocessors are everywhere in Amateur Radio and the following links document a few I have done for my own applications A "CW IDer for RS" Simplex Repeator, "PDF Format", "Source Code", might as well be legal