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INTRODUCTION
The RS-500 Resistance Substitution Box is a convenient
instrument for determining the desired resistance values in circuits
under design or test. The resistance obtainable is form 0
11,111,110
in 1 ohm steps.
resistors.
OPERATION
All of the resistors are wired in series. A switch on the front panel
shorts each resistor. Putting the switch in the ON (up) position
removes the short and places the resistor across the output
terminals.
The two green binding posts serve as the output
terminals. The black binding post is tied to the front panel. To place
any resistance across the output terminals turn ON those switches
that add up to the desired resistance. For example, for 5,071 , turn
on the 3k , 2k , 40 , 30
and 1
TWO YEAR WARRANTY
All Elenco models are guaranteed for two full years on
all parts and service. For the first 3 months, your power
supply is covered at absolutely no charge. For the
remaining 21 months, a nominal service charge is
required to cover shipping and handling.
When returning merchandise for repair, please include
proof of purchase, a brief letter of explanation of
problem, and sufficient packing material.
returning any merchandise please call our service
department at (847) 541-3800 to obtain a return
authorization number (RMA).
Service Department
All resistors are precision 1%
switches.
Before
PARTS LIST
to
Qty Description
1 1
1% 2W
1 2
1% 2W
1 3
1% 2W
1 4
1% 2W
1 10
1% 2W
1 20
1% 2W
1 30
1% 2W
1 40
1% 2W
1 100
1 200
1 300
1 400
1 1k
1% 1W
1 2k
1% 1W
Qty Description
1 PC Board
28 Switch Slide DPDT
1 Front Panel
1 Case
4 Spacer 7/16" x 1/4"
4 Spacer 4-40 x 1/2"
1 Binding Post Black
3 Lockwasher, Binding Post
3 Nut, Binding Post
2 Binding Post Green
4 Screw 4-40 x 1/4" Flat Head
4 Screw 4-40 x 3/4" Pan Head
3 Washer Flat 1/8"
1 Lockwasher #4 Internal
3 Lockwasher #4 External
RESISTORS
Part #
Qty Description
111033
1 3k
112033
1 4k
113033
1 10k
114033
1 20k
121033
1 30k
122033
1 40k
123033
1 100k
124033
1 200k
1% 1W
131032
1 300k
1% 1W
132032
1 400k
1% 1W
133032
1 1M
1% 1W
134032
1 2M
141032
1 3M
142032
1 4M
MISCELLANEOUS
Part #
1% 1W
143032
1% 1W
144032
1% 1W
151032
1% 1W
152032
1% 1W
153032
1% 1W
154032
1% 1/2W 161031
1% 1/2W 162031
1% 1/2W 163031
1% 1/2W 164031
1% 1/2W
171031
1% 1/2W
172031
1% 1/2W
173031
1% 1/2W
174031
Part #
517011
541023
614103
623003
624120
624431
625031
625031LW
625031HN
625033
641434
641483
645600
646402
646405
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