Elenco AM Radio Kit - Manual (Page 18)

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ASSEMBLY INSTRUCTIONS
Integrated Circuit
Insert the IC socket into the PC
board with the notch in the direction
shown on the top legend Solder the
IC socket into place. Insert the IC
into the socket with the notch in the
same direction as the notch on the
socket.
Figure J
C20 - .047
μF (473) Discap
C18 - 10 μF Lytic Capacitor
C16 - 10
μF Lytic Capacitor
(see Figure Da)
R20 - 1.2k
Ω 5% 1/4W Resistor
(brown-red-red-gold)
TP9 - Test Point Pin
(see Figure F)
C17 - 10 μF Lytic Capacitor
(see Figure Da)
U1 - IC Socket 8-Pin
U1 - Integrated Circuit LM-386
(see Figure J)
C19 - 0.1 μF Discap (104)
R21 - 10 Ω 5% 1/4W Resistor
(brown-black-black-gold)
IC
IC socket
PC board
Notch
Notch
marking
STATIC MEASUREMENTS - IC AUDIO AMPLIFIER
(SW2 on the down [IC] position)
RESISTANCE TEST
You have completed wiring the IC Audio Amplifier. We shall proceed in testing this circuit. You will need for static
measurements, a Volt-Ohm-Milliammeter, preferably a digital type.
Adjust the Volt-Ohm-Milliammeter (VOM) to the highest
resistance scale available. Connect the VOM to pin 6 of
the IC as shown in Figure 14. Do not connect the battery.
The VOM should indicate a low resistance first and then
as C14 charges, resistance should rise to approximately 4M
Ω. If you get a lower reading, reverse multimeter
leads. If you get a reading lower than 100k
Ω, check the
circuit for shorts or parts inserted incorrectly. If you get
a reading higher than 10M
Ω, check for open copper or
bad solder connections on all components.
Figure 14
GND
TP10