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W7FU USA flag USA

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QSL: PSE NO QSL

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website: www.w7fu.com

Licensed and continuously active since October 1955; first as KN6OJV, then W7HQJ, and most recently as W7FU, in honor of a mentor Gordon Norris. The previous call holder, a good friend and Elmer, is now a silent key. Gordon's place as a friend and Elmer has been taken by Steve Buroker, W7QC.

Married with 3 children, and 2 grandchildren, we have lived in the same QTH for over 40 years. We like to garden, entertain, camp, ocean kayak, bicycle travel, and spend time with the teen age grandkids.  I am a retired practicing physician and remain active in hospital affairs.  In my freetime, I am quite active building and operating my VHF through microwaves with a homebrew SDR radio system. 

An important part of my life has been our local radio club, Radio Club of Redmond, N7KE. The Club bands together for fellowship, Elmering and to operate QRP and other operating events / contests. It is very gratifying to see the Club grow over the years and provide support to the local hams. Would encourage other hams to organize local clubs of their own and enjoy the fun that comes from getting together around a common interest.  I am also active with the PNWVHF Society.  A wonderful group of people who band together to help one another operate and innovate on the 50 MHz and above part of the radio spectrum.

My ham radio activity started out with QRP as a novice, with a crystal controlled 6V6 transmitter on a wooden chassis, and moved on through modifying surplus and homebrew receivers and transmitters. In these last 30 years, my activity has spanned AO6, AO7, and AO8 satellites in addition to the HF bands.  CW is my preferred operating mode.  Great for my QRP radios and rather poor radio location.  My current operating interest spans the HF and VHF bands, as well as microwave roving. looking forward to return to satellite operation when the new generation, Phase 4, ham radio communication satellites become available.

My current station is entirely homebrew and consists of two second generation SDRs, one for HF and one for 50 MHz and above.  The HF SDR is based on a multi-mode DSPs that I have authored using GNU Radio with GNU Radio Companion:  http://gnuradio.org/redmine/projects/gnuradio/wiki.  This DSP software is linked to an Ettus USRP N210 SDR transceiver module that I am using to operate on HF; www.ettus.com/  The 50 MHz and above station uses the same DSP software and is linked to the Ettus B210 SDR transceiver.  The B210 SDR transceiver is a state of the art, direct conversion SDR, based on components from the broadband digital data communications industry.  This modern SDR architecture lends itself to high performance narrow band amateur applications and permits operation from 50 to 6000 MHz.  The rig is easily packaged for both home station and rover operation.

The DSP programming tool that I am presently using is the opensource GNU Radio DSP software library.  This opensource software library permits flexible programing in C++, python, or with a graphical user interface (GNU Radio Companion), depending on ones programming abilities.  More information on GNU Radio is available from the GNU Radio Wiki:  http://gnuradio.org/redmine/projects/gnuradio/wiki  and on my GNU Radio Companion website: "Ham Friendly DSP": www.w7fu.com 

I am always interested in a rag chew and the opportunity to meet and correspond with hams who are technically minded or just have questions on SDR related topics.  Contact me if you are interested in learning more.

73

John

 

7772357 Last modified: 2016-12-20 15:39:25, 3924 bytes

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