Ramsey Electronics AM1 Assembly And Instruction Manual page 11

27. Install C3, .01 µF disc capacitor.
28. Install Q1, 2N3904 NPN transistor. Be sure to orient the part
correctly.
You've just completed the audio input circuitry. Have another look at your
solder connections to ensure that there are no cold or intermittent joints.
Hang in there, only 7 parts to go!
29. Install L1, the large 48 µH wire wound inductor.
30. Install R10, 1K ohm resistor [brown-black-red].
31. Install Q3 and Q4, the last two 2N3904 NPN transistors. Be sure to
orient the flat side correctly.
32. Install C5, .01 µF disc capacitor [marked .01 or 103 or 10nF].
33. Install C13, .002 or .0022uF disc capacitor [marked 2000, 2200
or .002, .0022].
34. Install inductor L3, 10 µH [marked 100].
35. Install C14, .002 or .0022uF disc capacitor [marked 2000, 2200
or .002, .0022].
What about those extra parts !!!??? Now you'll need to make some
decisions on how we are going to use our AM transmitter. Follow the
following final assembly instructions carefully.
AM1 Final Assembly Instructions
If you wish to use a microphone as the audio source for your AM
transmitter, you'll need to increase the gain of the audio amplifier by
installing electrolytic capacitor C4.
If the input is to be "line level" audio from a tape or CD player, there is no
need to install capacitor C4.
If necessary, (as discussed above) install 10 µF electrolytic capacitor C4.
Observe the correct polarity!
Next, you'll need to determine what frequency you wish to set your
transmitter to. It really is not sufficient to just "check" the AM band for an
empty frequency, using the AM radio closest at hand. It is your responsibility
to research what AM stations can be listened to in your area and not to
interfere with any of your neighbors in their reception of any commercially
licensed broadcast station. Usually a modern car radio (with external
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