A5A6 Current Limiter PCB - Barbecued R3. Older iterations of this board (all that I've found schematics for) show a series of (3) 2W resistors - R3, R8 & R25; 150, 120 & 120 ohms each, respectively. The board (mid 80s production, based on the semiconductor date codes) has only R3 - 24? ohms, with the locations for the other resistors unpopulated and jumpered, apparently from the factory. There are no reference designator silkscreens for the other two resistors.
Fluke 335ADC Voltage StandardDifferential Voltmeter