First arcade machines to use switching (not linear) power supplies

[japlytic]

I am curious about what were the first arcade machines which used switching power supplies for the main logic (not the monitor).
If you know of any (the earlier the better!), please list them here.

[stj]

Re: First arcade machines to use switching (not linear) power supplies

first factory job was atari i-robot i think - 1983.

http://www.ionpool.net/arcade/irobot/irobot.html
very over-engineered and built like a tank.
(i own one - they are very rare! )

linear psu's are more reliable in long-term situations, so switchers only came into use when the games started to need more than 4-5A of power.

there are williams defender machines built in 1980 that are still running today that have never had the linear psu touched.