Thanks, Sebi. I was worried about filtering out the voltage ripple. I am using this supply to build and test audio amplifiers, and I really hate it when you get a hum from the power supply.
But I just breadboarded the entire circuit together, and I am very happy with the LM 350's ripple rejection. At 30 volts dc output, I am only getting .1 millivolts rms of ripple. This is without the inductor, so I am not going to use it. I used a 10 mfd on the 350's pins, and 22 mfd bypassing the output of the LM 350.
The inductor does help lower the ripple before it gets to the LM 350, but there's no significant difference on the final output of the LM 350. This regulator chip apparently has an excellent ripple rejection.
I did not use a 10,000 mfd bypass cap between the rectifier and LM 350 across the rails. Could not buy one on Sunday. I only used 470 mfd, and it works fine. When I remove the 470 mfd cap, the ripple does go up, but only to about 5.5 millivolts. Tomorrow I will buy a 1000 mfd cap and use it on the final build.
My power supply is almost finished. I have only to etch a board and soldier it together; I already have a metal box w/ all the holes drilled, and output test lead sockets mounted. I did a little drilling and bolted an old Pentium heatsink to the LM 350, which is probably overkill, but the cooler, the better. 8)
Thanks everyone for all of your input.