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Signals on a correctly working capstan board/

Signals on a correctly working capstan board

Bottom line of grid is 0V

Capstan board with locations of TP1 and TP2, as well as solder jumpers to select either 4.8 or 9.6 cm/s tape speed. Only one jumper should be shorted at a time! — Board TP and jumper locations

Signal at TP1 at 4.8 cm/s; 1 ms/div, 1 V/div. At 9.6 cm/s period will be one half of shown here. — Signal at TP1

Signal at TP2; 1 ms/div, 1 V/div. — Signal at TP2

Lead 6 of IC1 at 4.8 cm/s; 1 ms/div, 2 V/div. At 9.6 cm/s period will be one half of shown here. — Signal at lead 6 of IC1

Signal at C12 and C14, either lead; 10 ms/div, 2 V/div. At 9.6 cm/s period will be one half of shown here. — Signal at C12 and C14

Signal at right-hand lead of C2; 1 V/div. Voltage should be close to max voltage of impulses at TP2. — Signal at right-hand lead of C2

Signal at lead 2 of IC3; 1 V/div. — Signal at lead 2 of IC3

© 2024 Denis Petrov / 238pro

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