I'd like my PS to be +-35V after rectification and the cap bank. However, its closer to 39V. How can I reduce voltage from the powersupply? would voltage dividing resistors do the trick? or is there some other better way?
Is it a constant current, you're drawing from the PSU?
Is it a low or high current, your drawing?
Is the 39 Volt with or without load?
If it's not a constant current, but sometimes a high one, the problem is the small difference between the unregulated and regulated voltage, since the voltage drop-out(that's the the minimum difference between input and output needed, before the regulator's regulating) for a high-current regulator's typically 4-6 Volt.