Elecraft KSB2 - Manual (Page 3)

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Components on KSB2 Module, continued
R21 Resistor, 68K, 5%, 1/4-watt (blue-gray-orange) 1
R22 Resistor, 560K, 5%, 1/4-watt (green-blue-yellow) 1
R1 Potentiometer, 1 M trimmer ("105") 1
RP3 Resistor network, 2.0 K, 3 R, 6 pins (77063202 or 980663202) 1
RP1,RP2 Resistor network, 2.7 K, 4 R, 8 pins (77083272) 2
RP5 Resistor network, 47K, 5 R, 6 pins (61473) 1
RFC1,RFC2 Toroidal inductor, 19 turns on FT23-43 core (0.23") 2
T1 Toroidal transformer on FT37-43 core (0.375"), 7:22 turns 1
T2 Toroidal transformer on FT37-43 core (0.375"), 4:22 turns 1
U1 IC, Microcontroller, 16F872 or 16F872A 1
U2 IC, Digital-to-analog converter, 8 bits, MAX522 1
U3 IC, Audio amp/speech compressor, SSM2166 (SMD, pre-installed) 1
U4 IC, Dual comparator, LM393 1
U5 IC, Balanced Mixer/Modulator, NE602 (alt: SA602, NE612, etc.) 1
U6 IC, voltage regulator (6 volts), 78L06 1
X1-X7 Crystal, 4.9136 MHz (matched for crystal filter).
Note: Save the envelope, which is labeled with a calibration value. 7
Z1 4.0 MHz ceramic resonator w/internal capacitors 1
Components on Front Panel Board
P1 Conn., dual-row 16p male, 0.1" spcg 1
C4-C8 Capacitor, .01 µF, 0.2" (5 mm) lead spacing 5
Q3 Transistor, PNP, 2N3906 1
RP3 Resistor network, 10 K, 4 R, 8 pins (77083103) 1
Rbias Resistor, 10 K, 5%, 1/4 W (optional mic bias; see text) 1
R13 Resistor, 68.1K, 1%, 1/4 W 1
Components on RF Board
J11 Conn., 12-pin female, 0.1" pin spcg 1
J9, J10 Conn., 3-pin female, 0.1" pin spcg 2
Hardware and Miscellaneous
HDWR Socket for U1 on KSB2 module, 28 pins 1
HDWR #4 split lock washer (quantity shown includes 2 spares) 6
HDWR 4-40 x 1/4" ZN ST phillips machine screw 2
HDWR Standoff, 3/16" dia. x 3/8" long, round, 4-40 threaded 1
MISC Wire, #26 enamel, GREEN 2 ft.
MISC Wire, #28 enamel, RED 5 ft.
MISC Wire, #24 insulated, solid conductor 2 ft.
MISC KSB2 PC Board 1