untitled

1. In the sheet of gasket material, cut a hole (using your utility knife or
   X-ACTO knife) large enough to slip over the 1" threads.
   Use one of the PVC fittings as a template.


2. Use scissors to cut the outer diameter of the gasket about^3 ⁄ 8 " larger
   than the inner diameter.


3. Repeat Steps 1 and 2 to create a second gasket.

Whenever you cut with a utility knife or an X-ACTO knife, wear leather

work gloves to reduce the chance of cutting yourself if the knife slips.

4. Glue a 16", 1"-diameter PVC pipe into the female end of the 90° fitting.


5. Glue the male end of the 90° fitting into the slip fit end of the 1" x 1"
   fitting.

Gaskets 1" thread x 1" slip fitting

1" thread x ¾" slip fitting 1" x 1" 90° slip fitting 1" PVC pipe

Figure 6-10:
Put the
fittings
together
like this.

Chapter 6: Focusing Sound with a Parabolic Microphone 127