New article - HP 3245A Universal source

Worklog and teardown of rare precision DC/AC source from HP.
Added by tin over 7 years ago

New article about Hewlett-Packard HP3245A obsolete universal generator. Teardown, repairs and tweak guide.

Instrument firmwares, calibration test results verification and video covering operation are shown.
Contents include next items:

  • Intro
  • Disclaimer
  • Initial inspection and basic disassembly
  • Manuals references
  • Repair workflow
    • Boards condition check
  • Diagnostics
  • Firmware
  • Calibration
  • Performance verification
  • Tweaks
    • Main reference upgrade
    • Additional output amplifier for 0.1x/0.01x gain
  • Restoration summary