SET UP.
E
D
C
A
B
F
H
G
I
S
P
J
R
Q
V
L
M
U
O
K
T
N
U
MATERIALS
[A] Speaker
[B] Wire-wrap or magnet
wire, 30 gauge
[C] Spray paint (optional)
gloss black
[D] Signal source such
as a signal generator or
computer running a
program such as ToneGen
(
nch.com.au/tonegen)
[E] Amplifier such as a
stereo amplifier, that the
signal source can plug into
[F] Epoxy glue
[G] Aluminum tape
Photography by Edwin Wise
[H] Packing tape cheap
plastic
[I] Small plastic cups ( 2)
should be roughly the
same diameter as the coil
inside the speaker, which
in my case was 2". Try
condiment containers.
[J] Graphite powder sold
in hardware stores as a
dry lubricant
[K] Rigid styrofoam sheet,
½" thick, 4" square from
insulation or packing
material
[L] Plastic tubing,
y" outer diameter (OD),
3" long available at hobby
and craft stores
[M] Metal tubing,
y" inner diameter (ID),
3" long available at hobby
and craft stores
[N] Thin metal sheet,
2' square, about 22 to 24
gauge
[O] Nylon bolt, #10-24,
about 1" long You’ll cut
it down to size.
[NOT SHOWN]
Fine powder such as fine
sand, gelatin powder, salt,
or sugar
Awl or nail and hammer
TOOLS
[P] Drill
[Q] Straightedge
[R] Wire cutters
[S] Sharp knife
[T] Marking pen
[U] #10-24 tap
and drill bit
[V] Sandpaper
Make: 125
