AtariFreak's Arcade Adventures
Personal History of Arcade Restorations and Repair – NW Oregon

Robotron 2084 – latest

The schematics show the output on the Soundboard to be matched for 8 ohms.  Its funny that Williams would put a 6″ 4 Ohm 3 watt speaker in the cabinet.  Since the ohm value of the speaker is less, the amp needs to run twice as hot – I wonder if this is the reason that the AMP chip cooked…hmm. This wouldn’t be a huge deal, but there is very little volume control its either loud or louder. 

 Think I will start the hunt for a good 8ohm slightly higher say 10 watt speaker, I really don’t want to wire up a big resistor in line or cut the cab for an additional speaker (just kidding of course haha). 

Placed an order for 2 Joystick Grommets, the ones on this machine are wore out.  That will be a nice improvement.  Also need to do some final clean up of the wiring and connectors, etc. 

More later!

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