Presentation for SPARK on January 3, 2012 by Rob Neece, KK4R, and Bill Conkling, NR4C.

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Presentation transcript:

Presentation for SPARK on January 3, 2012 by Rob Neece, KK4R, and Bill Conkling, NR4C

 Introduction  Examples  Links  More Examples  Show and Tell

 Home brewing includes anything you build from circuits to antennas.  There are many levels of home brewing  Design and build from scratch  Combine existing designs  Club projects  Partial kits and mini kits  Major kits, small and large

 There are many techniques for circuit construction  Printed circuit boards  Perf board  Point-to-point wiring  Ugly construction  Un-etched circuit boards

Ugly construction – the parts are soldered directly to the PCB. There is no etching pattern and no holes. Parts hold each other up and only ground connections attach to the board.

Perf board construction and point-to-point wiring.

Home designed printed circuit layout and PC boards ordered from a vendor.

Left – laser printer mask and resulting circuit board, etched at home. Right – hand-masked circuit board for surface mount regulator board.

 Almost All Digital Electronics Almost All Digital Electronics  Elecraft, kits from major to mini Elecraft, kits from major to mini  Fox Delta, small kits Fox Delta, small kits  Hamtronics, VHF & UHF Hamtronics, VHF & UHF  Ramsey Ramsey  Small Wonder Labs QRP Small Wonder Labs QRP  Ten Tec Ten Tec  Emtech QRP tuners and rigs Emtech QRP tuners and rigs  K1EL WinKey kits K1EL WinKey kits  NorCal QRP Club NorCal QRP Club  Ham Radio Secrets -- web resource Ham Radio Secrets -- web resource  N0HR.com homebrew and kit resource page N0HR.com homebrew and kit resource page  NR4C Spud Gun Project NR4C Spud Gun Project

Right – NorCal 40a 1 W transceiver kit with no point-to- point wiring. Left – QRP amp for 20 and 40 M, input 1 W, output 5 W.

Left – NorCal QRP dummy load, surface mount parts. Right – Elecraft directional coupler with hand-wound inductors.

Second generation MPARC club project (original design put together by N1LO). Special cores improved performance.

Note that the response is nearly flat from the KHz range to 54 MHz!

Air pressure operated launcher for hanging antennas. Upper left – special spool for line. Note the yellow plastic “spud”.