The KD2BD 9600 Baud Modem

Reference			Description     
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R1, R2, R24, R37, R51, R52	100k ohm 1/4-watt 5% tolerance resistor

R3, R14, R15, R16, R17,
R63, R64, R65, R66		18k ohm 1/4-watt 5% tolerance resistor

R4, R18, R19, R21, R27,
R31, R32, R39, R40, R43,
R45, R47, R48, R53, R54,          
R55, R57, R58, R68		10k ohm 1/4-watt 5% tolerance resistor

R5, R6				1 megohm 1/4-watt 5% tolerance resistor

R8				10k ohm multi-turn trim pot     
R7, R23				50k ohm trim pot
R70, R71			10k ohm trim pot

R9, R12, R13, R61, R62		27k ohm 1/4-watt 5% tolerance resistor     
R10				120k ohm 1/4-watt 5% tolerance resistor     
R11, R20			220k ohm 1/4-watt 5% tolerance resistor     
R22				150k ohm 1/4-watt 5% tolerance resistor
R25, R28, R44, R67		4.7k ohm 1/4-watt 5% tolerance resistor
R26, R59			33k ohm 1/4-watt 5% tolerance resistor
R29				1.2k ohm 1/4-watt 5% tolerance resistor
R30				3.0k ohm 1/4-watt 5% tolerance resistor
R33, R34			220 ohm 1/4-watt 5% tolerance resistor
R35, R36, R42, R46, R69		1k ohm 1/4-watt 5% tolerance resistor
R38, R41			22k ohm 1/4-watt 5% tolerance resistor
R49				47k ohm 1/4-watt 5% tolerance resistor
R50				51k ohm 1/4-watt 5% tolerance resistor
R56				1.5k ohm 1/4-watt 5% tolerance resistor
R60				56k ohm 1/4-watt 5% tolerance resistor


C1				180pf 5% tolerance monolithic capacitor
C2				150pf 5% tolerance monolithic capacitor   
C3, C4, C5			0.22uF 25-volt tantalum capacitor   
C6, C8, C10, C12, C28, C30, C32	470pF 5% tolerance monolithic capacitor  
C7, C9, C29, C31, C33		0.001uF 5% tolerance monolithic capacitor
C11				120pF 5% tolerance monolithic capacitor
C14, C25			0.0068uF 10% tolerance disk ceramic capacitor
C13, C17, C18, C22, C23, C24	0.1uF 25-volt tantalum capacitor
C15, C16, C26			100pF 5% tolerance monolithic capacitor
C19				0.01uF 10% tolerance disk ceramic capacitor
C20				0.047uF 10% tolerance disk ceramic capacitor
C21				1uF 25-volt tantalum capacitor
C27				680pF 5% tolerance monolithic capacitor

D1, D2, D5			1N914 silicon switching diode
D3				Red LED (Automatic Frequency Control)
D4				Yellow LED (Data Carrier Detect)

Q1, Q2, Q5, Q6, Q7, Q8, Q9, Q10	2N3904 Small signal NPN transistor  
Q3, Q4				2N3906 Small signal PNP transistor

U1, U2, U4, U9			TL084  Quad Bi-FET Operational Amplifier  
U3, U6				CD4070B CMOS Quad Exclusive-OR Gate   
U5, U15				CD4013B CMOS Dual "D" Flip-Flop
U7, U16				CD4006B CMOS 18-Stage Static Shift Register
U8				CD4046B CMOS Micropower Phase Locked Loop
U10				CD4016B CMOS Quad Bilateral Switch
U11				LM3914 Dot/Bar LED Display Driver
U12				LM78L05 +5 volt 100mA voltage regulator
U13				LM78L08 +8 volt 100mA voltage regulator
U14				CD4040B CMOS 12-Stage Ripple Counter

M1				100uA Panel Meter (Signal Quality)

SW1				SPDT Switch (AFC A/B)
SW2				SPST Switch (AFC On/Off)

Table 1: Parts list for the KD2BD 9600 Baud Modem


Reference			Number		+12v	+8v 	GND
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U1, U2, U4, U9			TL084		Pin  4		Pin 11  
U3, U6				CD4070B 	Pin 14		Pin  7   
U5, U15				CD4013B		Pin 14		Pin  7
U7, U16				CD4006B		Pin 14		Pin  7
U8				CD4046B			Pin 16  Pin  8
U10				CD4016B		Pin 14		Pin  7
U11				LM3914		Pin  3		Pin  2
U14				CD4040B		Pin 16		Pin  8

Table 2: Integrated circuit power connections

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