[Amps] Tube regulators

[Gene Bigham]

With all this discussion about tube regulators I have a question.  Is there a cheap way to make a direct AC mains supplied power supply for approximately 48 to 50 volts DC for a solid state amplifier using some type of regulator off the 110-120 volt AC line?  I keep wondering about rectifying the 110-120 volts AC and then using some form of a regulator for the high current 48-50 VDC required?