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( ) Strip 1/4" of insulation from the end of the (+) Power Supply
wire and twist and tin the exposed wire strands. Connect
this wire to lug #1 of Power Switch S1 mounted on the control
panel. Solder the single wire at this lug (see fig 4).
( ) Attach the Theremax circuit board to the
case bottom using the four 4-40 X 1/2"
machine screws, #4 X 3/16" rolled aluminum
standoffs and nuts supplied as shown in fig 5.
Notice the #4 solder lug which is mounted
under the nut at the upper right corner of the
circuit board, and the orientation of the board
(Oscillator coil cans go toward the front of the case).
( ) Strip 1/4" of insulation from the end of the (-) Power Supply
wire and twist and tin the exposed strands. Connect this wire
to the solder lug installed on the circuit board above. DO NOT
SOLDER this connection.
( ) Connect the free end of the wire originating at circuit board point
"G" to the solder lug on the circuit board. DO NOT SOLDER.
( ) Connect the free end of wire originating at lug #3 of S1 to the
solder lug on the circuit board. SOLDER all THREE wires
connected to this lug.
( ) Re-install the case bottom using the ten #4 X 3/8"
self tap screws. Do not overtighten.
( ) Install the antennae mounting hardware
(8-32 X 1" Flat Head Machine Screw,
#10 X 1" OD Flat Washer, #8 Solder Lug
and 8-32 Nut) in the holes in the rear of
the case as shown in the illustration.
( ) Locate the 1,000 uH choke coil (looks like
large resistor color code brown-black-red)
and cut both leads off to a length of 3/8".
Solder one lead of the inductor to the end
of the coax coming from point "V" and the
other to the soldering lug on the Volume
(left) antenna mount. See Illustration.
( ) Solder the center conductor of the co-ax
sections originating at circuit board point
"P" directly to the solder lug on the Pitch (right)
antenna mount. (see illustration facing page)
18
Theremax
062702
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