Personal Audio Amp for Hearing Loss

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Programmable Equalizer

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Cell Phone Amplifier

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Audio Electronics

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Digital Technology?

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Kit Building

As a young ham radio enthusiast, I assembled my first operating station by tearing down and reassembling broken TVs and radios. After months of saving from several odd jobs, I was able to step up to a ‘real’ rig — a DIY crystal-controlled CW transmitter from the now defunct Heathkit Corporation. Over the years, I eventually acquired an amplifier, digital multimeter, SWR meter, PLL-based transceiver, and other test and operating equipment kits from the company. The equivalent of paint-by-numbers, the various kits were not only affordable, but easy to repair and modify. Given the well-written documentation and large user community, I was virtually guaranteed of success, and there was no scrounging for hard-to-find, expensive parts.

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Finding Your Tone

Most of the projects described in Nuts & Volts can be built with readily-available, relatively inexpensive components from the likes of Digi-Key (www.digikey.com), Jameco Electronics (www.jameco.com), and All Electronics (www.allelectronics.com). Furthermore, in the rare cases in which the project author doesn’t supply the printed circuit board (PCB) layout, it’s typically a simple matter to use one of the free or inexpensive PCB CAD applications. Thanks to extensive libraries of the latest chip and surface-mount components, a layout is seldom more than a few dozen mouse clicks away. However, when it comes to tube-based projects, it’s a different matter.

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Build A Precision Stereo Headphone Amplifier

For about $30 in parts for the core amplifier and a weekend of soldering, you can enjoy premium audiophile sound through your MP3 player or iPod.

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