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REQ: 1960's era HP 745A AC calibrator schematic or service manual

Discussion in 'Electronic Repair' started by [email protected]>, Nov 10, 2005.

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    > Guest

    Hello folks, was wondering if anybody might have schematics or a service
    manual for one of these old boat anchors?

    This unit I've got seems to work most of the time, but, intermittently,
    the AC output goes rather wild by more than 100mv of it's set output. I've
    tried taking out all the plug-in cards and cleaning all the contacts on
    them, but this hasn't helped any. I hesitate to start with the "replace
    all the caps" method of troubleshooting as there's tons of them in this
    thing, and would rather apply some more traditional methods of
    trouble-shooting. Thanks for any help!

    Best Regards,

    Jay Walling
    Diagnostic Engineer
    jwalling AT
    Comark Corporation
    93 West St.
    Medfield, MA 02052
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