Elenco Resistor Substitution Box User Manual

RESISTANCE SUBSTITUTION BOX

MODEL K-37

Copyright © 2009, 2004 by Elenco®Electronics, Inc. All rights reserved. Revised 2009 REV-A 753400

No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

Elenco®Electronics, Inc.

Assembly and Instruction Manual

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PARTS LIST

If you are a student, and any parts are missing or damaged, please see instructor or bookstore.
If you purchased this kit from a distributor, catalog, etc., please contact Elenco®Electronics (address/phone/e­mail is at the back of this manual) for additional assistance, if needed. DO NOT contact your place of purchase
as they will not be able to help you.

RESISTORS

Qty. Symbol Description Color Code Part #

r 1R1 10Ω 5% 1/2W brown-black-black-gold 121001
r 1R2 22Ω 5% 1/2W red-red-black-gold 122201
r 1R3 47Ω 5% 1/2W yellow-violet-black-gold 124701
r 1 R4 100Ω 5% 1/2W brown-black-brown-gold 131001
r 1 R5 220Ω 5% 1/2W red-red-brown-gold 132201
r 1 R6 330Ω 5% 1/2W orange-orange-brown-gold 133301
r 1 R7 470Ω 5% 1/2W yellow-violet-brown-gold 134701
r 1 R8 680Ω 5% 1/2W blue-gray-brown-gold 136801
r 1R9 1kΩ 5% 1/2W brown-black-red-gold 141001
r 1 R10 2.2kΩ 5% 1/2W red-red-red-gold 142201
r 1 R11 3.3kΩ 5% 1/2W orange-orange-red-gold 143301
r 1 R12 4.7kΩ 5% 1/2W yellow-violet-red-gold 144701
r 1 R13 6.8kΩ 5% 1/2W blue-gray-red-gold 146801
r 1 R14 10kΩ 5% 1/2W brown-black-orange-gold 151001
r 1 R15 22kΩ 5% 1/2W red-red-orange-gold 152201
r 1 R16 33kΩ 5% 1/2W orange-orange-orange-gold 153301
r 1 R17 47kΩ 5% 1/2W yellow-violet-orange-gold 154701
r 1 R18 68kΩ 5% 1/2W blue-gray-orange-gold 156801
r 1 R19 100kΩ 5% 1/2W brown-black-yellow-gold 161001
r 1 R20 220kΩ 5% 1/2W red-red-yellow-gold 162201
r 1 R21 330kΩ 5% 1/2W orange-orange-yellow-gold 163301
r 1 R22 470kΩ 5% 1/2W yellow-violet-yellow-gold 164701
r 1 R23 680kΩ 5% 1/2W blue-gray-yellow-gold 166801
r 1 R24 1MΩ 5% 1/2W brown-black-green-gold 171001

MISCELLANEOUS

Qty. Description Part #

r 1 PC Board 517007
r 1 Switch SPDT PC Mount 541103
r 2 Switch 12 Position 542013
r 2 Knob 622009
r 1 Case with Cover 62RS400
r 4 Screw 4 x 1/2” Phil A 642465
r 2 Nut 9mm 644102
r 2 Washer 9mm x 15mm 645103
r 1 Alligator Clip Black 680001
r 1 Alligator Clip Red 680002
r 1 Wire Black Stranded 12” 814210
r 1 Wire Red Stranded 12” 814215
r 1 Solder Lead-free LF99

The Resistance Substitution Box is a convenient instrument in determining the desired resistance values in
circuits under design or test. The values selected for your resistance substitution box were determined to be
the most commonly used in modern solid-state circuits. The values are from 10Ω to 1,000kΩ (1 meg) in 24
steps. All resistors are 5% tolerance 1/2 watt.

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PARTS IDENTIFICATION

Switch 12 Position

9mm Nut

Alligator Clip

Switch PC Mount

Resistor

Washer

IDENTIFYING RESISTOR VALUES

Use the following information as a guide in properly identifying the value of resistors.

BANDS

1

2 Multiplier Tolerance

PC Board

BAND 1

1st Digit

Color Digit
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9

BAND 2

2nd Digit

Color Digit
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9

Multiplier

Color Multiplier
Black 1
Brown 10
Red 100
Orange 1,000
Yellow 10,000
Green 100,000
Blue 1,000,000
Silver 0.01
Gold 0.1

Resistance

Tolerance

Color Tolerance
Silver ±10%
Gold ±5%
Brown ±1%
Red ±2%
Orange ±3%
Green ±0.5%
Blue ±0.25%
Violet ±0.1%