Heathkit IG-18 - Page 82

Page 74
NOTES,
I. RESISTORS AND CAPACITORS, EXCEPT THOSE IN THE NOTCH FILTER CIRCUIT,
ARE NUMBERED IN THE FOLLOWING GROUPS,
0-99 PARTS MOUNTED ON CIRCUIT BOARDS,
100-199
PARTS MOUNTED ON CHASSIS,
2, ALL RESISTORS ARE 1/2 WATT UNLESS MARKED OTHERWISE, RESISTOR
VALUES ARE IN OHMS (k·10001.
3, ALL CAPACITORS ARE IN ~F UNLESS MARKED OTHERWISE (pf'PICOfARADI,
4. ALL SWITCHES SHOWN IN fULL COUNTERCLOCKWISE POSITION WHEN VIEWED
fROM
THE KNOB END,
5, V INDICATES COMMON CIRCUIT GROUND,
6, -:::-INDICATES CHASSIS GROUND,
7. REfER TO THE CHASSIS PHOTOGRAPHS AND CIRCUIT BOARD X-RAY VIEWS
FOR THE PHYS ICAL LOCATION Of PARTS,
8, O+DC VOLTAGES TO EITHER COMMON OUTPUT TERMI NAL. All CI RCUIT
BOARD CONTROLS fULLY CCW, ALL FREQUENCY SWITCHES AND CONTROL
CCW, ALL AMPLITUDE SWITCHES AND CONTROLS fULLY CW, VOLTAGES ±]O%,
9, D+DC VOLTAGES, THE SAME AS ABOVE, EXCEPT SYMMETRY CONTROL
fULLY CW,
TRANS I STOR,
PART NUMBER
MAY BE
BASING DIAGRAM
DIODE
REPLACED WITH
C
Ql, Q2, Q4
417- 94
2N3416
B@E
C
Q3, Q5
411-201
S@E
II
Q6, Q7, Q8
417-154
2N2369
EOC
WI DE SPACE
B
QI0
417-178
40389
E~C
WIDE SPACE
Sill CON
01, 02, 05, 06
57-65
100 PIV, 100 rnA
D3, 04 56-26 IN 19]
ZENER
D7
56-66
VR43 1
WATT
D8
56-56
IN4149