Essentially all AC transformers ever made are ProtoSound compatible except the CW-80 and its brethren. Of course, a whistle and bell button are beneficial for activation of features.
Here is a recent manual. Go to page 45.
Note: Very early PS1 and QSI do not play well with the Z-500/750/1000. Some issues can also arise with the MRC DualPower 027 (wired handheld throttle).