Heathkit ID 22 Manual

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" I; PRICE $1.00

L9
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HARBOR,

ENTON

COMPANY B

HEATH

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RESISTOR AND CAPACITOR COLOR CODES

RESISTORS

The colored bands around the body ofacolor coded resistor rep-
resent its value in ohms. These colored bands are grouped
toward one end of the resistor body. Starting withthis end
of the resistor, the first band represents the first digital
the resistance value; the second hand represents the second
digit; the third band represents the number by which the first
two digits are multiplied. A fourth band of gold or silver rep-
resents a tolerance of *5% or elok respectively. The absence
of a fourth band indicates a tolerance of e20%.

CODE

COLOR ISI DIGIT 2ND DIGIT MULTIPLIER
BLACK 0 O I
BROWN I I I0
RED 2 2 I00
ORANGE 3 3 I000
YELLOW 4 4 Icon
GREEN 5 5 I00.ooo
BLUE 6 s Iooo.ooo
VIOLET 7 7 10.000.000
GRAY s e 100000.000
WHITE 9 s - Looo.ooo.ooo
GOLD - - .I
sILVER - - .OI
TOLERANCE
GOLD 15-1.

SILVER tIOV-
N0 BAND $201-

The physical size of a composition resistor is related to its
wattage rating. Size increases progressively as the wattage
rating is increased. The diameters of 1/2 watt, 1 watt and
2 watt resistors are approximately l/8", 1/4" and 5/18",
respectively.

The color code chart and examples which follow provide the
information required to identify color coded resistors.

EXAM PL E S
-YELLOW-4-
--V|OLET-7-} (412.533?)
ORANGE-LOOO- °

K SILVER = TOLERANCE
%- : love

-RED -2
_RED_2 22x Ioo.ooo

-GREEN-IO0.000 (OR 2.2 MEG.)

I-\No BAND uTOLERANCE
% 220%

CAPACITORS

Generally, only mica and tubular ceramic capacitors, used
in modern equipment, are color coded. The color codes differ
somewhat among capacitor manuiacturers, however the codes

M I C A
CODE EXAMPLE
COLOR IJTDIGTT Z~DDIGIT MULTIPLIER TOLER.°7
2 7 x 'OP
\ \
ILACII o e o I :20 "OL in
norm I I In - 5°
2 2 I00 1 2
ORANGE- 3 3 7- lose a :
VELLOW 4 4 Inooo -
GREEN 5 s -- i 5
Lu: s o - -
VIOLET 1 7 -- -
cm a l _ -
more 9 I - -
cots - - ,I -
sILVEA - - .m : I0
CHARACTERISYIC

ossEIvE
DIRECTION or
ARROW

2.70 Guy? .1: 5 7.
on .0027 utd

WHLOI
ILKWT

INDICAYES
MICA

CHARACTERISTIC-
sEE NOTE I sELow

(VALUE IN nut-serum: 3 sELOW)

shown below apply to practically all of the mica and tubular
ceramic capacitors that are in common use. These codes com-
ply with EIA (Electronics Industries Association) Standards.

TUBULAR CERAMIC
Place the group of rings or dots to the left and read from left
to right.

CODE EXAMPLE
COLOR 5V DIGIT 2ND DIGIT MULTIFLIER TOLEFI. w.
.

BLACK 0 #¥ 0 *7 I in :20
BROWN l i I la XOJ XI
RED 2 - 2 '00 - :2
ORANGE 3 - 3 1.000 - 12.5
YELLOW 4 4 IOIODO - -
SHEEN 5 5 -- $0.5 :5

WE I S - - _
VIOLET 7 7 - - -
GRAY - l a 7-~ - 20,25 -
WHITE I 9 - 1|.O

7/ I \
GIG DIG ILK (IN
I I I

z .
TEMPERATURE a a x I 151
COEFFICIENT-

BEEOIJI 33 uuf .t 5 '1,

TEMPERATURE
COEFFICIENT-
: NOTE 2
IELow.

(VALUE IN nut-SEE NOTE a snow)

NOTES:

1. The characteristic of a mica capacitor is the temper-
ature coefficient, drift capacitance and insulation resistance.
This information is not usually needed to identity a capacitor
but, if desired, it can be Obtained by referring to EIA Stand-
ard, Its-153 (a Standard of Electronic Industries Association.)

2. The temperature coefficient of a capacitor is the predict-
able change in capacitance with temperature change and is

expressed in parts per million per degree centigrade. Refer
to EIA Standard, Its-198 (a Standard of Electronic Industries
Association.)

3. The farad is the basic unit of capacitance, however cap-
acitor values are generally expressed in terms of ufd (micro-
farad, .000001 fax-ad) and uni (micro-micro-farad, .000001
Ilfd); thereiore, 1,000 uuf = .001 Md, 1,000,000 uuf=1ufd.

USING A PLASTIC NUT STARTER

A plastic nut starter offers a convenient method
of starting the most used sizes: 3/16" and 1/4"
(3-48 and 6-32). When the correct end is pushed
down over a nut, the pliable tool conforms to the
shape of the nut and the nut is gently held while it
is being picked up and started on the screw. The
tool should only be used to start the nut.

, ASSEMBLY AND OPERATION OF THE
' HEATHKIT ELECTRONIC SWITCH

I MODEL lD-22

POSIIIDI

t}
. nuwur C5

I

SPECIFICATIONS

Switching Rates: ............................ Approximately 150, 500, 1500 and 5000 cycles
Signal Frequency Response: ................. {1 db 0-100 kc
Input Impedance: ........................... 100 KT? control
Output Impedance: .......................... 1000 Q shunted by 1000 MIT
Max1mum Signal Output: ..................... 25 volts peak-to-peak
Maximum Signal Gain: ....................... 5 times
Maximum Input at Maximum Gain: ............ 1.8 volts RMS (5 volts peak-to-peak)
watching Transients: ....................... 2 volts peak-impeak, see NOTE below*.
Tube Complement: .......................... 2 - 12AX7

3 - 12AU7

1 - 6C4

1 - 6X4
Power Ilequirements: ....................... 105-125 volts, 50-60 cycles, 30 watts
DimenSIons: ................................ 9 1/2 wide x 6 1/2" high x 5" deep
Sh1pping Weight: ............................ 8 lbs.

*ITOTE: The switching transient may overload high gain oscilloscope amplifiers. Low level
Signals should be amplified to 0.1-1.0 volt levels before connection to the Electronic Switch.

C I II I952
W 9 7/20/62

Heath Company