High tap: a little more coil power from the transformer

Every maker's transformer has a high-tap connection for low line voltage. It raises only the solenoid voltage, by 2 or 3 V; the 6 V lamp winding is separate. Williams: of the two lugs on the right, normal tap (24 V) then high tap, left to right. Bally: lug 2 is high tap and lug 4 normal. Gottlieb: of the two lugs on the left, high tap then normal tap, left to right.

Unplug the game first: the power cord, fuse block and transformer primary carry 115 V line voltage.

Systems

• Electro-mechanical

Related tips

• Moving an EM transformer to the high tap
• EM transformer high and normal tap positions by maker
• Test an EM transformer
• What the EM transformer supplies
• Coil voltages used by EM makers
• EM transformers almost never fail
• Add a power switch to an EM that has none
• Bridge rectifier for 1970s Bally and Williams DC coils

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