Previously Featured Builds

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Tim Bonner

Tim Bonner

Here's my iteration of the Balanced Bride of Zen preamp. In keeping with the spirit and intent of the project… More...
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Ian Mackenzie(DIY High-Low Crossover)

Ian Mackenzie

Here is my High Low Pass Active Crossover project. I started on this project over 12 months ago after reading… More...

Matching Devices — Nelson Pass / 1993

After you acquire the devices, you will need to test them. You might consider running lots of tests on these transistors, but only one is essential: measuring gate-source voltage versus current. The greatest variations occur here, and it is necessary to do some matching to get proper performance. This test will also tell you whether or not the device is broken. The test is simple and requires a power supply, a resistor, and a DC voltmeter. Figure 12 shows the test hookup for N- and P-channel types. The supply source resistance (R1) is nominal, and is found from I =… More...

Amp Camp Project — Pass DIY / 2016

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