Cover by David Erik Nelson

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Building It

  1. Begin by opening the hose clamps and fitting their ends together to form a 20″ steel hoop (Figure 10-3). Set this aside.

    The Thunderdrum’s hoop of steel (“Hoop of Steel” is also a good name for your new electro-skiffle band)

    Figure 10-3. The Thunderdrum’s hoop of steel (“Hoop of Steel” is also a good name for your new electro-skiffle band)

  2. Prepare the spring. The spring should be loose enough so that it can be dangled and jiggled in a manner that a kitten would love (the ideal goal is to be able to twirl it into a sloppy standing S-wave, as in Figure 10-4). An old, used screen door spring will likely already be this way.

    A new spring will be too rigid to do this (and is likely stiff enough to balance upright on its end). If you must use a ...

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