Reply to "Lionel 691PMB2101 Powered Railsounds 4 Motherboard"

Sid's TrainsOGR Forum Member

gunrunnerjohn posted:
Take ohmmeter and measure between the AC ground and the DC ground. If they're not connected with close to zero ohms, don't use that 5V supply.

Hey John,

I have been working on the engine with the powered motherboard and it working, but the sound seems strange. Whenever a sound like the whistle ends, there is this sort of gargled vibrating sound. Also when that is happening the speaker is moving a lot. Any idea on what is occurring here.

2/11/196:19 PM

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