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QEX article on VNWA  1978k v. 2 Oct 8, 2012, 12:46 PM Mark Schoonover
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Calibrated RF Voltmeter  Sep 21, 2012, 11:22 AM Mark Schoonover
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Very nice custom built N2PK VNA  Sep 26, 2012, 1:41 PM Mark Schoonover
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Free Electronic Circuits, Diagrams, Schematics and Projects.  Oct 5, 2012, 8:48 AM Mark Schoonover
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IDE for PIC microcontrollers  Sep 25, 2012, 8:57 AM Mark Schoonover
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An open source USB programmer for PIC micros, I2C-SPI-MicroWire-OneWire-UNIO EEPROMs, some ATMEL micros, generic I2C/SPI devices and (soon) other devices  Sep 25, 2012, 8:57 AM Mark Schoonover
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Power Over Ethernet Injector Kit - Very easy to duplicate for the home brewer.  Oct 5, 2012, 8:17 AM Mark Schoonover
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COAX Power Injector  145k v. 3 Oct 5, 2012, 8:31 AM Mark Schoonover
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Homebrew RF sampling Tee used to "sniff" some RF from the output of a transmitter to safely be used by a frequency counter or oscilloscope.  Sep 21, 2012, 11:26 AM Mark Schoonover
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usbpicprog - a free and open source usb pic programmer  Sep 25, 2012, 8:57 AM Mark Schoonover
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UHF+ antennas made from printed circuit boards.  Oct 3, 2012, 12:33 PM Mark Schoonover
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An excellent book on the art and science behind amateur radio homebrewing. Authored by: Frank W. Harris, KØIYE Version 13, June 2013. (10MB)   9025k v. 2 Jul 3, 2013, 9:14 PM Mark Schoonover
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(Previous Version) An excellent book on the art and science behind amateur radio homebrewing. Authored by: Frank W. Harris, KØIYE Version 12, January 2011. (14MB)   13660k v. 5 Jul 3, 2013, 9:01 PM Mark Schoonover
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Sun Ultra 5 Service Manual  5332k v. 2 Dec 30, 2012, 1:29 PM Mark Schoonover
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  4818k v. 2 Sep 3, 2012, 10:57 AM Mark Schoonover
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  10943k v. 2 Sep 3, 2012, 10:57 AM Mark Schoonover
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  670k v. 2 May 9, 2014, 7:16 AM Mark Schoonover
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  48k v. 2 May 9, 2014, 7:16 AM Mark Schoonover
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IC-7000 HM-151 microphone mod for better audio.  80k v. 3 Aug 3, 2012, 10:42 AM Mark Schoonover
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Data sheet for MIC element referenced in WX7Y's instructions.  289k v. 2 Sep 3, 2012, 11:00 AM Mark Schoonover
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Analysis and design of electronic circuits for communication systems, with an emphasis on integrated circuits for wireless communication systems. Analysis of noise and distortion in amplifiers with application to radio receiver design. Power amplifier design with application to wireless radio transmitters. Radio-frequency mixers, oscillators, phase-locked loops, modulators, and demodulators.  Dec 27, 2013, 7:09 AM Mark Schoonover
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  Jun 2, 2013, 6:47 PM Mark Schoonover