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HP-65 and HP-67 card reader how to test the amplifier ?
10-09-2022, 10:29 PM
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teenix Offline
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RE: HP-65 and HP-67 card reader how to test the amplifier ?
The head signals should be about +/-100mV and can be read when the sense chip is connected with a scope probe connected to HAC or HBC.

The scope trace is on page 31 of the Classic Notes

cheers

Tony
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RE: HP-65 and HP-67 card reader how to test the amplifier ? - teenix - 10-09-2022 10:29 PM



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