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# KA7EXM PIC Power Meter As published in May/June 2005 QEX and June 2005 QST Click here for a link to KA7EXM's site which has the latest source code - which is the code currently in all the Kanga kits Click here for a PDF file with listing of features and photo Click here for the kit documentation Introductory Letter (PDF file) Click here for the kit documentation Parts List (PDF File) Click here for the kit documentation Parts Layout (PDF file) Click here for page 1 of the Construction Notes (PDF file) Click here for page 2 of the Construction Notes (PDF file) Click here for page 3 of the Construction Notes (PDF file) Click here for page 4 of the Construction Notes (PDF file) Click here for page 5 of the Construction Notes (PDF file) Preliminary web info... This Power meter is based on the Analog Devices AD8307 chip. It can be used for measuring RF power from about -80dbm to +7 dbm (picowatts to almost 10 mw). With an external TAP attenuator (not yet available - see the ARRL Book "Experimental Methods in RF Design for info) it can measure power levels up to 100 watts. It covers the frequency range of 1 - 500 MHz. Using a 18F452 PIC chip and an LCD display, it can provide readings in both dbm or picowatts thru milliwatts. Calibration is done with three known power levels you provide, and the PIC chip does the rest. For more detailed info on the circuit check out the articles in QEX and QST. They should be available on the ARRL web site shortly. When they are, I will provide a link to them. I will provide more info here as I get time to update the site. Right now I am trying to get the kits ready to go for Dayton! The kit includes everything needed to get it running except a 9 volt battery. Documentation includes a copy of the QEX article, PC board layouts and parts lists, and construction notes. It does not include step-by-step instructions (The Construction notes provide info on how to assemble the kit)! It is not a beginners kit - SMT parts are involved! As I get time I will provide photos on this web site of the steps I went thru to build the unit in the case provided with the kit. Price - $125 S/H will be $5 for US orders. DX S/H will be at cost. Click on the images for a larger picture