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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
additional assistance, if needed. DO NOT contact your place of purchase as they will not be able to help you.
Qty.
Symbol
Value
r 1
R5
10Ω 5% 1/4W
r 1
R1
680Ω 5% 1/4W
r 1
R3
5.6kΩ 5% 1/4W
r 1
R4
10kΩ 5% 1/4W
r 1
R2
18kΩ 5% 1/4W
r 1
R6/S3
Potentiometer 50kΩ & switch w/ nut & washer
Qty.
Symbol
Value
r 1
C6
33pF
r 1
C7
82pF
r 1
C10
180pF
r 1
C5
220pF
r 1
C8
330pF
r 1
C4
470pF
r 1
C13
680pF
r 1
C23
1500pF
r 2
C11, C12
3300pF
r 1
C15
0.033μF
r 1
C19
0.047μF
r 6
C3, C9, C14, C16, C17, C*
0.1μF
r 2
C21, C22
10μF
r 1
C20
22μF
r 1
C1
100μF
r 2
C2, C18
220μF
Qty.
Symbol
Value
Description
r 1
L2
Coil 4-turn
r 1
L1
Coil 6-turn
SEMICONDUCTORS
Qty.
Symbol
Value
r 1
D1
BB909/BB910
r 1
D2
1N4001
r 1
D3
r 1
U2
LM-386 or identical
r 1
U1
TDA7088T or identical
MISCELLANEOUS
Qty.
Description
r 1
Antenna FM
484005
r 1
PC board w/ installed U1 (TDA7088T) 517038
r 2
Push button switch 12mm
540005
r 1
Battery holder
590096
r 1
Speaker 8Ω
590102
r 1
Cap push button switch yellow
622001
r 1
Cap push button switch red
622007
r 1
Knob pot / switch
622050
®
(address/phone/e-mail is at the back of this manual) for
RESISTORS
Color Code
brown-black-black-gold
blue-gray-brown-gold
green-blue-red-gold
brown-black-orange-gold
brown-gray-orange-gold
CAPACITORS
Description
Discap (33)
Discap (82)
Discap (181 or 180)
Discap (221 or 220)
Discap (331 or 330)
Discap (471 or 470)
Discap (681 or 680)
Discap (152)
Discap (332)
Discap (333)
Discap (473)
Discap (104)
Electrolytic radial
Electrolytic radial
Electrolytic radial
Electrolytic radial
COILS
Description
Varactor
Semiconductor silicon diode
Red LED 3mm
Low voltage audio power amplifier
FM receiver SM installed on PC board
Part #
Qty.
Description
r 1
Screw M1.8 x 7.5mm
r 2
Antenna screw M2 x 5mm
r 1
Nut M1.8
r 1
Socket IC 8-pin
r 1
Speaker pad
r 3"
Wire 22 ga. solid
r 1
Solder Lead-free
-1-
GLOSSARY (Continued)
RF
Radio Frequency.
Sensitivity
The ability of a receiver to pick
up low-amplitude signals.
Part #
121000
Speaker
An electronic device that turn
136800
electric impulses into sound.
145600
151000
Surface-mount
A method of using special
151800
Technology
components that are soldered
192522
to the PC board's surface.
Trimmer
An
Part #
resistor, capacitor, or inductor of
213317
small values.
218210
221810
222210
QUIZ
223317
INSTRUCTIONS: Complete the following examination, check your answers carefully.
224717
1. The number of cycles produced per second by a source
226880
of sound is called the . . .
231516
r A) amplitude.
233310
r B) vibration.
243318
r C) sound wave.
244780
r D) frequency.
251010
2. The frequency of the modulating signal determines the
271044
. . .
272244
r A) number of times the frequency of the carrier
281044
changes per second.
282244
r B) maximum deviation of the FM carrier.
r C) maximum frequency swing of the FM carrier.
r D) amount of amplitude change of the FM
Part #
carrier.
430150
3. The FM broadcast band is . . .
430160
r A) 550 – 1,600kHz.
r B) 10.7MHz.
r C) 88 – 108MHz.
Part #
r D) 98.7 – 118.7MHz.
310909
4. The AFC circuit is used to . . .
314001
r A) automatically hold the local oscillator on
350003
frequency.
330386
r B) maintain constant gain in the receiver to
prevent such things as fading.
r C) prevent amplitude variations of the FM
carrier.
Part #
r D) automatically control the audio frequencies
641100
in the receiver.
643148
5. The device most often used for changing the local
644210
oscillator frequency with the AFC voltage is a . . .
664008
r A) feedthrough capacitor.
780128
r B) variable inductor.
834012
r C) varactor.
9LF99
r D) trimmer capacitor.
Transistor
Varactor
Voltage
adjustable
fine-tuning
Voltage Regulator A circuit that holds the DC
6. The capacitance of the varactor is determined by . . .
r A) the voltage level.
r B) the amount of current in the circuit.
r C) the signal strength of the RF carrier.
r D) the amount of resistance in the circuit.
7. The ability to select a specific band of frequencies,
while rejecting others, is called . . .
r A) selectivity.
r B) sensitivity.
r C) demodulation.
r D) none of the above.
8. The process of mixing two signals to produce a third
signal is called . . .
r A) filtering.
r B) detecting.
r C) rectification.
r D) heterodyning.
9. The circuit designed to supply substantial power output
into low impedance load is called . . .
r A) power supply.
r B) pre-amplifier.
r C) power amplifier.
r D) detector.
10. The gain of the LM-386 amplifier can be set in range
from . . .
r A) 1 to 20.
r B) 20 to 200.
r C) 0 to 200.
r D) 50 to 100.
-14-
A semiconductor component
that can be used to amplify
signals,
or
as
electronic
switches.
A diode optimized to vary its
internal capacitance with a
change in its reverse bias
voltage.
Electrical potential difference
measured in volts.
voltage.
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