It looks like both the steering and accelerator use 25k pots: https://arcarc.xmission.com/PDF_Arcade_Bally_Midway/280_ZZZap_Wiring_Diagram_(12_1_1976).pdf
Search for Allen-Bradley hot molded EJ (E=long life, J=panel mount) series potentiometers with a linear taper at 25k, if you can find them. I don't think you need EJC (C=slip clutch) if the game has mechanical stops at both ends (verify this, I never owned a 280). EJC is incredibly hard to find but EJ and even J are much more common. See pages 124-127: https://www.steampoweredradio.com/p...y electronic component catalog circa 1980.pdf
Atari used these EJC pots in many of their games and at the time they had the longest life of anything else available. Rated at a million turns, that is still pretty good by today's standards. Check eBay, you'll find many NOS pots. It's going to be a matter of ensuring things like the shaft length, shape and other dimensions will work with your game. It's a tedious process at times especially if the original is not readily available. You can also find a modern replacement but be wary of most parts the come directly from China. You'll be replacing them quicker than you think.
Search for Allen-Bradley hot molded EJ (E=long life, J=panel mount) series potentiometers with a linear taper at 25k, if you can find them. I don't think you need EJC (C=slip clutch) if the game has mechanical stops at both ends (verify this, I never owned a 280). EJC is incredibly hard to find but EJ and even J are much more common. See pages 124-127: https://www.steampoweredradio.com/p...y electronic component catalog circa 1980.pdf
Atari used these EJC pots in many of their games and at the time they had the longest life of anything else available. Rated at a million turns, that is still pretty good by today's standards. Check eBay, you'll find many NOS pots. It's going to be a matter of ensuring things like the shaft length, shape and other dimensions will work with your game. It's a tedious process at times especially if the original is not readily available. You can also find a modern replacement but be wary of most parts the come directly from China. You'll be replacing them quicker than you think.





