Ramsey Electronics AR2 Instruction Manual page 25

97. Install VR1, the LM7812 12 volt regulator. The hole in the large metal
part of the regulator is there so that you can attach the part to the board
with a screw and nut. This provides a better heatsink for the regulator.
Bend the leads down so that the part can lay flat on the circuit board, then
solder the part in.
98. Install D1, the 1N4000 series diode (any value from 1N4000 to
1N4007). The white or gray band on the part should be lined up with the
white band on the circuit board.
99. Install C3, 100 pF ceramic capacitor (marked 101).
100. Install C2, another 100 pF ceramic capacitor.
101. Install C1, the last 100 pF ceramic capacitor.
102. Install R1, 470 ohm resistor (yellow-violet-brown).
103.Install R2, 470 ohm resistor (yellow-violet-brown).
104.Install R3, the last 470 ohm resistor (yellow-violet-brown).
105. Install C4, 1000 µF electrolytic capacitor. This big electrolytic has the
same type of markings as the smaller 10 µF caps and must be installed
properly to work. The longer lead is still the positive and the shorter lead
that corresponds to the band on the side of the part is the negative. Push
the part all the way down to the circuit board for best stability before
soldering.
106. In the same way, install C61, the other 1000 µF electrolytic capacitor.
Check the board to be sure it's in the right way before soldering.
107. Install R40, 220 ohm resistor (red-red-brown).
108. Install C68, another 0.1 µF disc capacitor (marked .1 or 104).
109. Install R39, a 2 ohm resistor (red-black-gold).
110. Install C69, 0.1 µF disc capacitor (marked .1 or 104).
111. Install C66, the last 10 µF electrolytic capacitor. And this is the last
time I'll remind you about the polarity. That'll be a pleasant break, won't it?
112. Install R31, 470k ohm resistor (yellow-violet-yellow).
113. Install R41, 2.7k ohm standup resistor (red-violet-red).
114. Install R33, 4.7k ohm resistor (yellow-violet-red).
115. Install C53, 1nF disc capacitor (marked .001 or 102).
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