EG&G 113 amplifier teardown, repairs and benchmarks


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New batteries were acquired and holder 3D-printed for nicer assembly. Not that it matters functionally but it rather a 3D-printing excersize.

Interesting fuse with integrated wire-wound resistor was found in caged mains power supply section.

Fuse measured around 82 Ω which is typical for <100 mA fuses.

Area on PCB where batteries were was also slightly comtaminated.

Salts and grime cleaned up alright with solution of alcohol and water.

Few components next to area also attacked so I’ll have to fix those later.

Author: Ilya Tsemenko
Created: March 26, 2023, 7:44 p.m.
Modified: May 4, 2023, 2 a.m.