Jim Ahlstrom

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Personal

I live at 221 Pleasant Plains Road, Stirling, New Jersey 07980 USA with my wife Susan. We have two children, Jennifer and Michael. My main sports are birding and skiing. I also enjoy cooking. I am an exercise junkie, and work out at the Summit YMCA three times a week. I retired from Interet Corporation on January 1, 2012. You can email to this address or call me at home at 908-580-1319.

Electronics and Software

I first taught myself electronics as a teenager. I used tubes (valves), and I remember how excited I was to get my first transistor, a CK722. Since than, tubes were replaced by transistors, and transistors by integrated circuits. Opamps barely worked at audio, but now they can do 100 MHz. Electronics changes, and I lost track of how many times I relearned it.

I am an amateur at electronics, but a professional computer programmer. My main computer languages are Python, C and Fortran (yes, Fortran 77). I can manage some Verilog, Atmel AVR assembly language, C++ and several Unix mini-languages. I am a big fan of the Python language, please check it out. Python is an easy to use programming language with advanced features like classes and structured exception handling. It is mature, powerful, practical and free. It runs on Windows, Linux, Unix, Macintosh and other systems.

Ham Radio Projects

I got my first Amateur Radio license as a teenager. Amateur radio operators are licensed in the U.S. by the FCC to operate radio transmitters. We "hams" use our stations to chat with other hams around the country and around the world. My teenage license expired when I got busy with college. I got re-licensed later, but that license expired when I was raising my kids. In 2006 I got my most recent license, and I got my old call back, N2ADR.

I am interested in digital radio and Software Defined Radio (SDR). There is a lot of activity in this area. For a list of SDR projects, see this list by Christophe, F4DAN. My home station is a homebrew SDR transmitter and receiver. The hardware is my own design, and the software runs on a Windows or Linux PC. It is the only transceiver I have. The only commercial radios I own are an AOR AR8600 receiver and a handheld Yaesu VX-6. The hardware design files and the software for my transceiver are available on this site. Use the navigation links above.