Heathkit IT-12, Assembly Manual, Page: 13 / 30

Page 11
( ) Slip the two speed nuts J and K over the corners of the rear apron of the chassis. Make sure that the flat side of the
clip is towards the back and the holes in the clips are centered over the holes in the chassis.
( ) Temporarily, mount the 1 meg level control Rl using a control solder lug. Position as shown in Pictorials 2 and 3.
( ) In like manner mount the off-on switch S-1 using a control lockwasher between chassis and switch.
( ) Mount the filter condenser C7 so the lug marked with a square is towards the rear of the chassis. Twist the mounting
lugs 1/8 turn only.
( ) Mount the power transformer on the bottom side of the chassis with the wires towards the V2 tube socket. Use 8-32
hardware.
This completes the parts mounting, check all parts for correct position and make sure all screws and nuts are tightened
securely.
CHASSIS WIRING
( ) Connect the short black wire of the power transformer to lug 3 (Sl) of the off-on switch Sl.
( ) Twist the two green filament wires of the transformer
together, and connect one wire to pin 3 (NS) and the other wire
to pin 4 (NS) of tube socket V2.
( ) Connect one red transformer wire to ground lug U (NS) of
condenser C7.
( ) Feed the other red wire from the power transformer through
hole P and connect to lug 1 (NS) of terminal strip T.
( ) Feed the remaining black wire through hole N and connect to lug 1 (NS) of terminal strip L.