untitled

Washer with a^1 ⁄ 4 " inner diameter (ID) and 1^1 ⁄ 2 " outer diameter (OD)

^3 ⁄ 16 " ID rubber 0-ring

^1 ⁄ 4 " thick rubber gasket material

1" diameter schedule 40 PVC pipe, 16" long

1" clamp

Four^1 ⁄ 2 " 8-32 panhead screws

Four 8-32 nuts

You should be able to find the last 12 parts on this list at your local building

supply or hardware store. Take this book with you: The photos should help

you pick out the right parts, and everybody who sees you with it will realize

just how smart you are.

Microphone

cartridge

Right-angle

phono plug

SPST toggle switch Phono jack

Electrolytic

capacitor

Potentiometer

Ceramic capacitor IC Headphone jack

Figure 6-3:
Key
components.

Chapter 6: Focusing Sound with a Parabolic Microphone 121