Elenco AM Radio Kit - Manual (Page 9)

Test Point Pin
-8-
ASSEMBLY INSTRUCTIONS - AUDIO AMPLIFIER
We will begin by installing resistor R14. Identify the resistor by its color code and install as shown on page 3. Be careful to
properly mount and solder all components. Diodes, transistors and electrolytic capacitors are polarized, be sure to follow the
instructions carefully so that they are not mounted backwards. Check the box when you have completed each installation.
Diode
R14 - 47k Ω Resistor
(yellow-violet-orange-gold)
Q4 - 2N3904 Transistor NPN
(see Figure A)
TP6 - Test Point Pin
(see Figure F)
J1 - Jumper Wire
(see Figure C)
C11 - 10
μF Lytic
(see Figure Da)
R13 - 82k
Ω Resistor
(gray-red-orange-gold)
C14 - 470 μF Lytic
(see Figure Db)
Pot / SW1 with
Nut and Washer
Knob (pot)
Solder 5 lugs
to PC board
C12 - 47 μF Lytic
(see Figure Da)
Top Side
Q5 - 2N3906 Transistor PNP
(see Figure B)
TP7 - Test Point Pin
(see Figure F)
Q6 - MPS8050 (6560)
Transistor NPN (see Figure A)
R19 - 1 Ω Resistor
(brown-black-gold-gold)
R17 - 100 Ω Resistor
(brown-black-brown-gold)
TP8 - Test Point Pin
(see Figure F)
C13 - 470
μF Lytic
(see Figure Da)
SW2 - Slide Switch
Q7 - MPS8550 (6562)
Transistor PNP (see Figure B)
R18 - 820
Ω Resistor
(gray-red-brown-gold)
D2 - 1N4148 Diode
(see Figure E)
R16 - 1k Ω Resistor
(brown-black-red-gold)
TP10 - Test Point Pin
(see Figure F)
R15 - 100
Ω Resistor
(brown-black-brown-gold)
Electrolytics have a polarity
marking indicating the (–) lead.
The PC board is marked to
show the lead position.
Polarity mark
Capacitor C14
For safety, solder capacitor
C14 on the copper side as
shown. Bend the leads 90°
and insert into holes.
Check that the polarity is
correct, then solder in
place. Trim the excess
leads on legend side.
Figure Da Figure Db
(–) (+)
+
–
Warning: If the capacitor is connected with incorrect polarity,
or if it is subjected to voltage exceeding its working voltage,
it may heat up and either leak or cause the capacitor to
explode.
Jumper Wire
Use an excess lead to form a jumper
wire. Bend the wire to the correct
length and mount it to the PC board.
Figure E
Cathode Anode
Be sure that the band is in
the correct direction.
Band
NPN Transistor
Figure A
Mount so E lead is in
the arrow hole and flat
side is in the same
direction as shown on
the top legend. Leave
1/4” between the part
and PC board.
PNP Transistor
Figure B
Mount so E lead is in
the arrow hole and flat
side is in the same
direction as shown on
the top legend. Leave
1/4” between the part
and PC board.
1/8”
Legend side
of PC board
Figure F
Figure C
Flat side
1/4”
Flat side
1/4”