[sdiy] SEM: power supplies?

[T J]

> I am supposed to be receiving an SEM front panel/pcb soon and need to
> purchase a power supply.  From reading about the SEM it requires a +-18.5V
> linear power supply.

Hi everybody,
 So is this correct, +/-18.5V ? I have schematics that call for the more
common +/- 15V, but I have seen reference to the mentioned 18.5V supply.
Anyone with experience powering SEM's ?

Thanks
Terry (The Casio Kid)