Williams System 11A-C Sound board capacitor kit for type D-11297 & D-11298 Background Sound and Speech boards & type D-11581 Audio boards. Electrolytic capacitors dry out over time and are commonly known to have a 20 year life, these games are all now over 30 years old. Values used on factory boards varied and may be different, higher voltage tolerances are an improvement. Please note some D-11581 boards are not fully populated and noted with an * below, and that D-11298 boards have caps in different locations and not all are used.
For boards D-11297 & D-11298 (Pinbot, Early F-14 Tomcat and Millionaire)
- (2) each 1000uf/16V radial cap for C19 & C25
- (2) each 470uf/16V radial cap for C17 & C23
- (3) each 100uf/35V radial cap for C26, C27 & 1 extra
- (5) each 10uf/50V axial cap for C3, C4, C5, C6 & C8 **
**Note: Manual calls for C9 being a 10uf cap, but no examined boards have it populated.
For boards D-11581 (Later F-14 Tomcat, Fire!, Big Guns, Space Station, Cyclone, Banzai Run, Swords of Fury, Taxi, Earthshaker, Black Knight 2000, Transporter the Rescue, Police Force, Elvira and the Party Monsters, Bad Cats, Mousin' Around!, Whirlwind, The Bally Game Show, Pinbot (Some), Pool Sharks, Rollergames, Diner, Radical!, Dr. Dude, Riverboat Gambler, Bugs Bunny's Birthday Ball. Also used in Arch Rivals video game.
- (2) each 1000uf/16V radial cap for C29 & C32
- (2) each 470uf/16V radial cap for C26 & C30
- (3) each 100uf/35V radial cap for C12, C19 & C24
- (5) each 10uf/50V axial cap for C1, C3, C4, C8 & C17*
- (1) each 1uf/63V radial cap for C11 (until axials are in stock. Location is below mark "U18")
Of note: The Pinbot manual says D-11297 but I believe it's a typo. All Pinbot boards I've looked at have this number covered, but I've found one that says D-11298-549, 549 is the Pinbot game number. If you have a Pinbot showing D-11297-549, I would love to have a picture.