Mike Pads


Posted on Apr 22, 2012

What got me interested in building these diminutive devices is the S3FM connector assembly made by Switchcraft. The S3FM is simply a 3.5-inch tube fitted with a male XLR at one end and a female at the other, with enough room in the middle to build a mike pad, low-end rolloff network, polarity reverser, or any number of other useful little gadgets. Related to the S3FM is the 380AP1 series of XLR to 1/4-inch audio adapters. The metal sleeves on these adapters are smaller than the S3FM, though with care you can squeeze a phantom-powered active direct box into one.


Mike Pads
Click here to download the full size of the above Circuit.

With space at a premium inside these tiny tubes, you should use the smallest components you can find. For mike-level signals you can use 1/8-watt resistors, though these are less common than the standard 1/4-watt type. Again, Mouser and DigiKey carry thes




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