Heathkit IT-12, Assembly Manual

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( ) Connect one lead of a 68 K ohm resistor (blue-grey-orange) to pin 6 (NS) of VI.
( ) Connect the other lead to lug 2 of C7 (S4). Use sleeving on both leads. Connect one lead of a .005 mfd ceramic disc
condenser to pin 2 (S2) of VI. Connect the other lead to pin 6 (S2).
( ) Feed one lead of a 1 K ohm resistor (brown-black-red) through lug 3 (S2) of the level con-trol Rl and wrap around the
control solder lug Y (NS). Connect the other lead to pin 8 (Sl) of VI.
( ) Connect one lead of a 330 K ohm resistor (orange-orange-yellow) to pin 7 (NS) of VI. Wrap the other lead around
solder lug Y (S2).
( ) Connect one lead of a . 005 mfd ceramic condenser to pin 7 (S2) of VI. Connect the other lead to lug 2 (Sl) of control
Rl.
( ) Connect one lead of a .005 mfd ceramic condenser to lug 1 (Sl) of control Rl. Connect the other lead to lug 1 (NS) of
terminal strip X.
( ) Connect one lead of a . 001 mfd ceramic disc condenser to pin 1 (NS) of socket VI. Connect the other lead to lug 2
(NS) of terminal strip X.
( ) Connect one lead of a .01 mfd condenser to pin 1 (S3) of tube socket VI. Connect the other lead to pin 2 (NS) of tube
socket V2.
( ) Connect one lead of a 330 K ohm resistor (orange-orange-yellow) to pin 2 (S2) of socket V2. Use sleeving. Connect
the other lead to lug 2 (NS) of terminal strip Q.
( ) Connect one lead of a 330 K ohm resistor (orange-orange-yellow) to lug 3 (NS) of terminal strip Q. Connect the other
lead to lug 2 (NS).
( ) Connect one lead of a . 001 mfd ceramic condenser to lug 1 (NS) of terminal strip Q. Connect the other lead to lug 3
(NS).
( ) Connect one lead of a 3.3 megohm resistor (orange-orange-green) to lug 1 (S2) of terminal strip Q. Connect the other
lead to pin 7 (NS) of tube socket V2.
( ) Strip both ends of a 4" length of wire and connect one end to pin 7 of V2 (S2). Dress the wire towards front of chassis.
( ) Strip both ends of a 4 1/2" length of wire and connect one end to pin 6 (Sl) of V2. Dress towards the front center of
chassis.
( ) Strip both ends of a 2 1/2" length of wire and connect one end to lug 1 (Sl) of switch Sl.
( ) Connect one end of a 41/2" length of wire to lug 1 (NS) of condenser C7. Feed the other end through hole N and
connect to lug 2 (NS) of terminal strip T on the top side of the chassis.
( ) Connect one end of a 5 1/2" length of wire to lug 2 (NS) of terminal strip T. Connect the other end to lug 2 (Sl) of
switch Sl.
( ) Connect one end of a 5" length of wire to lug 2 (NS) of terminal strip L. Connect the other end to lug 4 (Sl) of switch
Sl.
( ) Connect the cathode lead of a silicon diode to lug 2 (S3) and the other lead to lug 1 (S2) of terminal strip T. The
cathode end is marked with a color end, a color dot, or a color band.
( ) Pass the line cord through hole M. Connect one wire to lug 1 (S2) and the other wire to lug 2 (S2) of terminal strip L.