BSX1 Component List. Resistors: R1 10k AFSK Input circuit R2 470k 2211 Pin 3 R3 1M 2211 Pins 7,8 R4 4k7 2211 Pin 6 pullup to +5V R5 27k 2211 Pins 11,12 R6 100k 2211 Pin 8 R7 18k 2211 Pin 12 R8 10k 2211 Pin 7 Pullup to +5V R9 100k 2211 Pin 7 to 4503 Pin 4 R10 10k 4053 Pin 2 Pullup to +5V R11 100k RS232 RTS in to 4503 Pin 14 R12 10k RS232 RTS Pullup to +12V R13 100k RS232 Data In to 4503 Pin 12 R14 470k Squelch In to 4503 Pin 10 R15 100k +12V Pullup on squelch line R16 10k Pulldown on RS232 Data In R17 33k Tuning Resistor for 2206 R18 22k Tuning Resistor for 2206 R19 15k Tuning Resistor for 2206 R20 22k Tuning Resistor for 2206 R21 10k Pullup on Z80 Interrupt line R22 10k Pullup on Z80 BUSREQ - Pin 25 R23 10k Pullup on Z80 WAIT - Pin 24 R24 10k Pullup on Z80 RESET - Pin 26 R25 10k Pullup on Z80 NMI - Pin 17 R26 10k Pullup on Z80 HALT - Pin 18 R27 47k Voltage divider on 2206 Pin 3 R28 47k Voltage divider on 2206 Pin 3 R29 220 To 2206 Pins 13,14 R30 10k From IC8 Pin 1 to Q4 base R31 10k From IC8 Pin 13 to Q1 base R32 2k2 Pullup to +12V for CTS out R33 2k2 Pullup to +12V for RS232 Out R34 100k From RS232 Data In to Q3 base R35 10k From IC9 Pin 2 to base of Q5 R36 10k From IC9 Pin 1 to base of Q2 R37 330 Pullup to +5V on Clock line. R38 1M Across Crystal VR1 10k Narrow Shift Lo tone adjust VR2 10k Wide Shift Lo Tone adjust VR3 10k 2211 Pll Centre freq. adjust VR4 10k Narrow Shift Hi tone adjust VR5 10k Wide Shift Hi tone adjust VR6 10k FSK Output level adjust Capacitors: C1 .1µ Bypass on 7805 5V regulator C2 .1µ Bypass on 7805 5V regulator C3 .1µ To 2211 Pin 2 C4 100p In AFSK Input circuit. C5 .1µ To 2211 Pin 3 C6 .1µ Bypass on IC1 C7 22n Pin 13,14 on 2211 (polyester) C8 .01µ Pin 11 on 2211 C9 2n2 Pin 8 on 2211 (Polyester) C10 .1µ To Pin 10 on 2211 C11 .1µ Bypass to IC2 C12 .1µ Bypass to IC4 C13 .1µ Bypass to IC5 C14 .1µ Bypass to IC6 C15 .1µ To Pin 2 of 2206 C16 22n BPins 5-6 of 2206 (Poylester) C17 .1µ Bypass to IC7 C18 .1µ Bypass to IC8 C19 10µ To pin 10 of 2206 C20 .1µ Bypass to IC9 C21 25µ To Pin 26 on Z80 C22 .1µ Bypass to IC10 C23 .1µ Bypass ro IC11 C24 30p To Pin 11 of IC12 C25 .1µ Bypass to IC12 C26 30p To pins 1,3,5,9,10 of IC12 IC1 XR2211 Modem Reciever IC2 4503 Tristate Buffer IC3 Z80A Microprocessor IC4 2764 EPROM (8k) IC5 6264 RAM (8k) IC6 6264 RAM (8k) IC7 2206 Modem Transmitter IC8 4013 Dual JK Flip Flop IC9 4013 Dual JK Flip Flop IC10 74HC32 Quad OR Gate IC11 74HC42 4 to 10 multiplexor IC12 74HC04 Hex Inverter IC13 7805 5V 1Amp Voltage reg. Q1 2N3904 or equivalent Q2 MPSA12 or equivalent Q3 2N3904 or equivalent Q4 2N3904 or equivalent Q5 2N3904 or equivalent Crystal 3.579545 MHz Miscellaneous: DPDT Switch for Hi/Lo Shift Selection SPST Switch for Power On/Off Push to Make Switch for RESET line 5 pin single in line molinex connectors (2 off) Sockets for IC1-IC12 Box Plugs and sockets for Box Shielded cable for Audio In lead and leads to rig from box. Ribbon Cable for other leads and to terminal.