Heathkit SG-8 Assembly And Operation Manual page 2

STANDARD COLOR CODE — RESISTORS AND CAPACITORS
DISC CER MIC RM CODE
3-Dot
Tolerance
------ Temp. Coeff.
HIC P
Temp. Coeff.
£
------ 2nd Figure
Tolerance
u
TC Multiplier Tolerance
XI L LE D CER MIC C P CITOR
Temp. Coeff. Capacity
2nd Figure I
Multiplier
J
Tolerance
Multiplier
MOLDED MICA TYPE CAPACITORS
Multiplier
Significant Figure
Working Voltage
Significant Figure
----- Multiplier
Significant Figure
MOLDED PAPER TYPE CAPACITORS
TUBUL R C P CITOR
Working Volts
Figure
-------- Multiplier Tolerance — I
Tolerance
Significant Figure
MTIll
illllll
2 digit voltage rating indicates more than 900 V.
dd 2 zeros to end of 2 digit number.
— Working Voltage
=> Rear
------ Tolerance
Significant Figure
__ Multiplier
Working ------
Voltage <=
Normally
stamped for
value
J N &
1948
RM
CODE
Black
Body
RM 3-DOT (OBSOLETE)
R TED 500 W.V.D.C. ± 20% TOL.
5-Dot __
. Capacity —
Multiplier ->
1st ( Significant
2nd
The tolerance rating of capacitors is determined by the color
code. For example: red = 2%, green = 5%, etc. The voltage
rating of capacitors is obtained by multiplying the color value
by 100. For example: orange = 3 X 100 or 300 volts. Blue =
6 X 100 or 600 volts
1st
2nd
SECOND HING
END COLOR
Second Figure
Voltage
(Opt.)
None
6
00
,000
0,000
00,000
000,000
0,000,000
00.000,000
000,000,000
Ta \ Digit
J-?2nd Digit
INSULATED
UNINSULATED
Color
BTACK
BROWN
RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET
GRAY
WHITE
FIRST RING
BODY COLOR
First Figure
0
1
2
3
4
6
7
8
9
R DI L LE D DOT RESISTOR
Multiplier
MOLDED FL T C P CITOR
Commercial Code
Tolerance
D 1 "
Tolerance
XI L LE D RESISTOR
Brown — Insulated
Black — Non-insulatcd
Temp —
Coeff.
BY-P SS COUPLING CER MIC C P CITOR
Capacity
I-V4-4
J N. CODE C P CITOR
Silver
2nd I Significant
1st £ Voltage Figure
^7 —
1st Figure
0
1
2
3
4
6
7
8
9
-I —
Multiplier
Courier/ of Centralob
THIRD RING I
DOI ' COLOR
.Multiplier
Mu, ' r P ,ier
Characteristic
BUTTON SILVER MIC
C P CITOR^T
Class -------------
Tolerance
Multiplier
3rd digit
RM 4-DOT (OBSOLETE)
----- Multiplier
Tolerance
— f L — Blank
Jn the design of Heathkits, the temperature coefficient of ceramic
or mica capacitors is not generally a critical factor and there ­
fore Heathkit manuals avoid reference to temperature coeffi ­
cient specifications.
------- 1st
[ ---- 2nd
EXTENDED R NGE TC CER MIC
Capacity
Illi
— ® ® --------- Tolerance
— Multiplier
1st 2nd J i:
Working
Voltage
I
The physical size of carbon resistors is determined by their
wattage rating. Carbon resistors most commonly used in Heath ­
kits are watt. Higher wattage rated resistors when specified^"
are progressively larger in physical size. Small wire ^wpffiid
resistors x / z watt, 1 or 2 watt may be colp^cdded buCthc first
band will be double width.
■
I \
i -------
I ----- Tolerance
RM (5-DOT OBSOLETE ^ODE)
Significant Figure
1 v x ------- Multiplier
=> Front
5-DOT R DI L LE D CER MIC C P CITOR
— I — Capacity
If
-pc
Multiplier
___ 2^ Significant Figure
------- Multiplier
- Tolerance
T f — 2nd
1 ■ 1st
RM 6-DOT (OBSOLETE)
/ -------- lsf I
/ . ------- 2nd ^-Significant Figures
J / r ~ 3rd )
-------- Multiplier
| * — Tale rance
1 --------- 'Working Voltage
R DI L LE D (B ND) RESISTOR
I — Multiplier
1st Figure
; | I — Tolerance
| Multiplier
1st and 2nd Significant Figures
Wire wound resistors have
1st digit band double width
CURRENT ST ND RD CODE
White (RM )- -
Black (MN)
Class 1 I — Tot
The standard color code provides all necessary information re ­
quired to properly identify color coded resistors and capacitors.
Refer to the color code for numerical values and the zeroes or
multipliers assigned to the colors used. A fourth color band on
resistors determines tolerance rating as follows: Gold = %,
silver = 10%. Absence of the fourth band indicates a 20%
tolerance rating.