I have been helping a new ham get started homebrewing. I convinced him that one of the essential workbench items is a good LC meter or some means to measure L and C. Pauls posts regarding LC Meters have been interesting. It is hard to compete with a $13 dollar meter. One of the popular LC Meters is the AADE meter that offers a digital readout. The AADE meter originated from an article by Bill Carver in the Communications Quarterly and also shown in EMRFD by W7ZOI. http://www.qsl.net/wm5z/cq199301b.pdf My friend Glenn, KE5LPB, is building the meter from the article this weekend. I decided to build it for the 3rd time. My meter requires either hand calculations, a computer program or a spreadsheet. I have a 1000pF .25% General Radio Standard Capacitor and assume I can calibrate the homebrew meter very close to that tolerance. The meter was built from the junk box and cost zero dollars. This is the simple board without the inductor which is a 23.8uH inductor wound on a T130-6 toroid and fills the large open space on the board. This is the finished LC Tester. This is the simple spreadsheet to calibrate and calculate. With this simple meter the results are essentially as accurate as the standard you use to calibrate the meter. The 1001.975 pF result is the SM capacitor in the LC tester. It is a 1% 1000 pF Silver Mica. The two clips measure approximately .8pF. The 1001.975 compares to 1001.505 average measured on my last homebrew LC meter for the same SM capacitor. I calibrated both of my HB testors with the .25% Standard. The variance is .0475%.