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Home brewing for ham radio

Presentation for SPARK on January 3, 2012 by Rob Neece , KK4R, and Bill Conkling, NR4C. Home brewing for ham radio. Introduction Examples Links More Examples Show and Tell. Outline. Home brewing includes anything you build from circuits to antennas. There are many levels of home brewing

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Home brewing for ham radio

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  1. Presentation for SPARK on January 3, 2012 by Rob Neece, KK4R, and Bill Conkling, NR4C Home brewing for ham radio

  2. Introduction Examples Links More Examples Show and Tell Outline

  3. 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 Introduction

  4. There are many techniques for circuit construction • Printed circuit boards • Perf board • Point-to-point wiring • Ugly construction • Un-etched circuit boards Introduction

  5. 30M, 1 W Transmitter with VXO 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.

  6. Desk Mic with Radio Shack Element Perf board construction and point-to-point wiring.

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

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

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

  10. Club kits from Norcal 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.

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

  12. Switchable 1:1 and 4:1 balun Second generation MPARC club project (original design put together by N1LO). Special cores improved performance.

  13. Balun test results in 4:1 position Note that the response is nearly flat from the KHz range to 54 MHz!

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

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