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PHASE 1
Audio Amplifier Section
1-1a. Carefully identify C12, a .1 μF mylar film capacitor.
It is marked 104 and has a dark, shiny somewhat rectangular
body, quite different from the many ceramic disc capacitors also
used in the kit.
1-1b. Install mylar film capacitor C12 per 1-1a.
1-2. Install C15, also .1 μF and marked 104, but is a ceramic
disc type.
1-3. Install C13, 100 pF, marked 101.
1-4. Install C19, .01 μF, ceramic disc type marked 103.
1-5. Install C9, also .01 μF ceramic disc.
Before soldering any of the following resistors, make certain that
you have selected the correct value. Pay close attention to the
color of the third multiplier band, so that you don't confuse 470,
4.7K and 47 K, etc. Also don't confuse R18 or R23 with L6 --
see note on previous page. Identify and install the following
resistors:
1-6. Resistor R23, 3.3 ohms (orange-orange-gold)
1-7. Resistor R18, also 3.3 ohms.
1-8. Resistor R14, 270 ohms (red-violet-brown)
1 -9. Resistor R16, 470 ohms (yellow-violet-brown)
1-10. Resistor R11, 4.7K (yellow-violet-red)
1-11. Resistor R12, 47 K (yellow-violet-orange)
1-12. Resistor R10, 1K (brown-black-red)
1-13. Resistor R13, 10K (brown-black-orange)
1-14. Identify correctly and insert Q4, transistor type
2N4124G, into its position, making sure that its flat side is
oriented per the board outline. Press the transistor as far into its
holes as it reasonably will go and solder all three connections.
1-15. Examine electrolytic capacitor C17, 220 μF. Notice
that one wire is longer: this is the (+) side. The (-) side is
marked by the dark band stripe down the side of the capacitor.
This and all other electrolytic capacitors in the kit MUST be
installed with the (+) side corresponding to the "+" marked on
the board.
1-16. Install C17, 220 μF electrolytic, per Step 1-15.
1253 - 19
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