Shaun Merrigan

Classic Electronic Restoration, Vacuum Tube Audio, Technical History, Photography

Tag: HP 8903B

HP 8903B Audio Analyzer PCB Pad Replacement

13/11/2025

Audio Test Equipment, General, Hewlett Packard (HP), Restoration of Classic Electronic Test Equipment

Originally posted in August 2017 HP 8903B Audio Analyzer PCB Pad Replacement Visual inspection of my recently acquired HP 8903B Audio Analyzer revealed that the polymer pads on the bottom side of the main PCB were seriously deteriorated: Besides making an unsightly mess, this residue may form corrosive products which, over time, could damage the PCB.…

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