Specifications

Parts List
If you are a student, and any parts are missing or damaged, please see instructor or
bookstore. If you purchased this signal tracer kit from a distributor, catalog, etc., please
contact Elenco Electronics (address/phone/e-mail is at the back of this manual) for
additional assistance, if needed.
Resistors
Qty. Symbol Description Part #
1 R6 100W 5% 1/4W (brown-black-brown-gold) 131000
1 R16 220W 5% 1/4W (red-red-brown-gold) 132200
1 R10 1kW 5% 1/4W (brown-black-red-gold) 141000
1 R13 2.7kW 5% 1/4W (red-violet-red-gold) 142700
1 R14 3.9kW 5% 1/4W (orange-white-red-gold) 143900
1 R8 4.7kW 5% 1/4W (yellow-violet-red-gold) 144700
1 R5 6.8kW 5% 1/4W (blue-gray-red-gold) 146800
3 R3, R9, R15 10kW 5% 1/4W (brown-black-orange-gold) 151000
1 R12 47kW 5% 1/4W (yellow-violet-orange-gold) 154700
2 R1, R2 100kW 5% 1/4W (brown-black-yellow-gold) 161000
1 R4 180kW 5% 1/4W (brown-gray-yellow-gold) 161800
1 R7 220kW 5% 1/4W (red-red-yellow-gold) 162200
1 R11 Trim Pot 220kW 191622
Capacitors
Qty. Symbol Description Part #
1 C1 .001mF Discap (102) 231035
3 C2, C3, C7 .1mF Discap (104) 251010
4 C4,C5,C6,C9 10mF Electrolytic (Lytic) 271045
Semiconductors
Qty. Symbol Description Part #
1 D1 Diode 1N5234 315234
1 Q2 Transistor 3904 323904
1 Q1 Transistor MPS 5172 325172
1 U1 IC LM-358 330358
1 D2 LED Diode .125” 350001
Miscellaneous
Qty. Description Part #
1 PC Board 512751
1 Switch Slide DPDT 541023
1 Probe Tip 616001
1 Knob (white) 622017
1 Earphone Jack 622102
1 Case 623007
1 Earphone 8W 629350
2 Screw #4 x 5/8” 643450
1 IC Socket 8-pin 664008
1 Alligator Clip Black 680001
1 Alligator Clip Red 680002
1 Alligator Clip Green 680003
1 Label 720510
12” Wire 815820
36” Cable 3-wire 870801
2” Tubing #20 PVC 890020
48” Solder 9ST4
-1- -10-
Specifications
Injector: Impedance 100W
Signal Level 75mV
Harmonic Spacing 1kHz
Pick Up: Input Impedance 100,000W
Gain Adjustable 1 to 50
DC Input Voltage: 5 to 40 volts
Input Current: 40mA max.
Customer Service
In the event that you encounter difficulty in getting the instrument
to work properly, write or e-mail ([e-mail]) us and
explain: (1) the tests that you have made and (2) how the
instrument behaved during these tests. Our experience has
demonstrated that most difficulties can be corrected by an
exchange of letters or a phone call.
If the instrument continues to work improperly and you would like
Elenco to locate the problem, send the unit along with a $10.00
check to our Service Department. They will repair, test the unit,
and return it to you with a brief report of the problem.