I am literally typing with the hammer in the other hand as I lay track on my first layout. Can’t believe I didn’t learn this earlier…but, I am testing the Atlas snap switches before I fix them down…what AC voltage is maximum for using these? I have a 16 V AC transformer that was formerly plugged into the speed controller from another IHC set that I planned to use just for the switch machines…is that too high…should it be 12V max? will I fry anything?
Thanks
Atlas Snap Switches are made to operate on 16 volts AC, which is what most accessory terminals on power packs put out.
Using Atlas control switches (or normally-off pushbuttons, or spdt momentary contact toggle switches, or a hot probe and studs in the track diagram…) you apply a brief (1/2 second or less) spike of power. 16VAC is fine for this.
OTOH, if, by some mischance (control switch failure, operator error…) power is applied CONTINUOUSLY to one coil of an Atlas machine, it will fry on a lot less than 16, or 12, volts. That is why many modelers swear by a capacitative discharge device which will provide a near-instantaneous spike of power, then fall back to a much lower power that won’t burn out a coil. I personally don’t use it, but my control switching system CAN’T apply more than an instantaneous surge, and CAN’T ever fail to continuous power on.
Hope this helps.
Chuck (modeling Central Japan in September, 1964 - with twin-coil switch machines)