EM coil voltage by maker

Most EM makers ran coils on 24 to 30 V AC. Bally used 50 V in the 1970s. Williams used 50 V AC until 1962 (Friendship 7) and 24 V after. Fifty volt games tend to be livelier; coils from a 25 V game and a 50 V game are not interchangeable.

Systems

• Electro-mechanical

Related tips

• Coil voltages used by EM makers
• Coil stops by maker
• Coil frame sizes by maker
• Wico coil numbers start with the original maker code
• Coil sleeves and plungers to keep
• Typical EM coil resistances
• What makes a coil stronger or weaker
• Bally C0- coil numbers and their replacements

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)