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I'm sure I'm just looking in the wrong places, but where do ya'll purchase reed switches and magnets at? My radio shack is kinda small and doesn't stock any. Also, i'm lookin for the tiny magnets for mounting on a loco. They are an 1/8th inch or 3/16 dia. not the big ones for mounting on the track.

Terry
 

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Radio Shack should carry the earth mags that are small and can be mounted to the back side of wheels to trigger sounds. You can try Phoenix for the reed switches. Later RJD
 

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I prefer the flat CH405-ND from digikey.com.
This unit has 2 mounting holes and PC standoff hardware can be used for mounting.

No glue necessary and they fit on track ties. Black color, normally open and more than enough voltage and current ratings for our trains.
Sealed and weatherproof!! cost is only 30 cents more than the round version. Quantity discounts available.

http://media.digikey.com/photos/Cherry Switch Photos/CHERRY SWITCH-MP201801.jpg

Model 402 is the round version.
 
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