Does anyone know when the 3 volt board replaced the 5 volt Proto2 Board. I have been told that the 5 volt boards are no longer available, so if you have an engine with one that goes bad you have to upgrade the whole electrical system to the 3 volt board. Is this correct?
I believe 3 volt boards started appearing in late 2003 and were the only boards supplied by 2004 or so.
If you have a 5 volt board that goes bad you can order a 3 volt board with 5 volt compatible plug connectors so you don't have to change wiring.
You still need to change the battery to 2.4 volt and the speaker to 4 ohm however, and load the correct 3 volt sound file.
Rod
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