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  • เผยแพร่เมื่อ 8 ก.พ. 2025
  • Teardown and calibration checking of a Keithley 480 Picoammeter Dave got from ebay.
    This was supposed to be a repair and troubleshooting as well, but Murphy had other ideas.
    Keithley 480 User & Service Manual: www.ko4bb.com/M...
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