HOW TO TEST YOURSELF
you make it, and stuff the extra wire through a slit made in
the side of the shoe box with scissors. Make slits wherever
you need them. Then clip the lead from your test plate
shoe box to the capacitor where shown. Next attach the
probe and handhold where shown. Finally attach the
speaker where shown. In the picture there are both mini-
hook and alligator clips depicted, but it is not important
which kind you use, only that you make secure connec-
tions.
- Test the circuit. Turn the speaker on, and the volume
half way. Turn the Syncrometer (light switch) ON. Test
the circuit by briefly touching the probe to the handhold.
The speaker should produce a sound like popping corn
(readjust speaker volume to a comfortable level). If you
hear nothing, go over each step carefully. Make sure the
batteries are fresh. Recheck all connections, especially
ones made to stripped wires. Replace the lid and turn the
shoe box over so it sits on its lid. - Label the potentiometer. Turn the knob almost fully
clockwise. Mark the box where the line on the knob
points. Grasp the handhold in one hand and press the
probe with your thumb. Listen to the pitch. Now turn the
knob almost fully counter-clockwise, mark the box, and
listen to this pitch. Whichever pitch is higher label MAX
(maximum) on the box. - You did it! Turn off the speaker and Syncrometer.
After you have used the Syncrometer for a while you may
wish to take your device to an electronics shop and ask some-
one to mount the components in an all plastic box and solder
the connections. This would let you travel with it in your suit-
case without mashing it into a jumbled mess of wires.