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QRZ! Ham Radio 8
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QRZ Ham Radio Callsign Database - Volume 8.iso
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f6fbb
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multiplx.gif
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Graphics Interchange Format
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1996-06-25
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15KB
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640x480
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1-bit (2 colors)
Labels:
diagram
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plan
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technical drawing
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schematic
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floor plan
OCR:
F6FBB PORT MULTIPLEXER Drawn by G6WHL @ GB7KLY 1993 IC1 = 4050 IC2 = 4052 0 F VEE 4K7 20 0 7 20 0 7 COMPUTER 470 0 PORT 470 4K7 12 470 0 470 0 TNC1 TNC2 0 0 3 14 DB25 0 D825 4 470 ICIA 13 3 15 4J5 IC2 11 0 4K7 IC18 7 10 4052 1 4K7 20 4K7 5 4K7 0 7, 2 k 2 2 4K7 0 6 VEE 4K7. 6 PORT ICIC 2, 2 k 2 10 19 +12 v= O VDD IC1D 150R R 2 k2 20 20 100n 12 11 T 100n VEE T DATA ICIE Z₹6.8v 2 k 2 -12 v- 150R O VEE TNC3 TNC4 14 -O VSS DB25 0 DB25 IC1F
