Joker Poker
Gottlieb, 1978Hi,
I am looking for a replacement transistor on Joker Poker. The one in question is the one under the field that controls the kings reset coil. Any suggestion what commonly available transistor would be suitable to replace the original? I got the tiny one on the lamp driver board.
Thanks
2N5880 or MJ2955
Be sure to add a 4K7 pull-up resistor.
http://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_1#Remote_Mounted_Transistor_Upgrade
2N5884 will work too.
BigDaddy Enterprises stocks those.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info
Quoted from Andreas:Im about to change to a 2n5884...do I need a resistor?
You should always add the pull up resistor to them, it prevents accidental lock on if your grounds are floating. Gottlieb added them themselves on later games where they (still) didn't have enough driver transistors for the coils on their games.
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