Ramsey Electronics LPA1, Инструкция по эксплуатации

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LPA1
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4. Install J1, the power jack. This is a black plastic jack. Solder the
connection on the back of the jack to the bottom side of the board. Now,
solder the other connection to both the bottom and the top sides.
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5. Install S1, the main switch. The switch is black, with a white button
coming out of it. Solder all six pins.
First we are going to install the power circuit. This circuit, containing R5, C3
and D1 light up the LED when the switch is on. After that, we will construct
the part of the circuit that powers the MAR3.
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6. Install R5, 1K ohm resistor [brown-black-red]. All resistors must be
mounted flush with the board.
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7. Install C3, 10uF electrolytic capacitor. C3 has “polarity.” Polarity
means that the capacitor must be inserted a certain way. You may notice
that on one side of the capacitor, there is a black stripe with minus signs.
This is the negative end. Looking at the parts layout diagram, you will
notice the positive side marked. When looking at the board from the
front (switch and LED side) the black stripe should be to the left when
properly installed. Capacitors allow AC waves to pass, while blocking off
DC power. C3 filters off any noise in the power circuit into ground before
it can affect the circuit.
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8. Install D1, the LED. The flat edge (and the shorter leg) must face
towards the switch. If the LED is backwards, it will not light.
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9. Solder the topside connection of the LED leg closest to the switch.
You have now completed the power circuit.
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10. Install R4, 150 ohm resistor [brown-green-brown].
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11. Install L2, 5.6uH inductor [green-blue-gold-yellow]. It will look like a
large resistor. It does not have any polarity, so it can be mounted in any
direction, and should be mounted as close to the board as you can. L2 is
called a “choke,” and is used to prevent the RF signal from getting up
into the rest of the circuit.
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12. Install C4, .01 uF disc capacitor [marked .01 or 103 or 10nF]. In
order to get the capacitor as close as possible to the board, take a pair of
needle nose pliers or a sharp knife and scratch away or crack off the
insulation on the legs of the capacitors. (Be careful not to break their
legs off. Capacitors have feelings too!) Solder the connection closest to
the outside of the board on both the top and bottom sides of the board.