Gottlieb and post-1962 Williams EM flipper coil strengths (30 V)
Gottlieb stock: A-5141, 450 turns of #22 on the power side, 1.9 ohms (used from Humpty Dumpty in 1947 to 1979; A-1546 is the same winding without a replaceable sleeve). Stronger: Williams FL-21-375/28-400, 1.3 ohms. Strongest: A-5141 yellow dot, 300 turns of #20, 1.0 ohm, which matches the late-1970s Williams FL-20-300/28-400. Williams frames are 1/16 inch longer, so they fit Gottlieb flipper mechanisms tightly.
Systems
Related tips
- Gottlieb EM flipper rebuild parts
- Bally and 1948-62 Williams (50 V) EM flipper coils
- Leave Williams EM flipper strength alone
- Stronger flipper coils for Gottlieb EMs
- Gottlieb large flipper coils by wrapper colour
- Gottlieb flipper coil windings (power/hold)
- Gottlieb yellow-dot A-5141 flipper coils
- Gottlieb high-power "yellow dot" flipper coils
Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)