Reply to "RK-1113L Protosound 1 PS1 Dryfuss Hudson without battery?"

Most MTH early proto-1s will leave neutral without a battery. ( up to around 96). After that the battery was required.

My challenger (94) had a battery switch on the front of the tender (really hard to get at) . If you forgot to turn it off , the whistle would blow continuously after a minute or so, I usually didn't make it all the way up the basement stairs.

2/23/165:03 PM

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