A Low Cost Regulated Voltage Doubler Part 2

[TheTransoceanic]

Hi, Great video and lots of info. I collect antique radios and am always looking to build "Battery packs" . The old "B" batteries had outputs from 22vdc to 90vdc, using the circuit that you have shown here or something like it, can I build a circuit that will allow me to use a few 9 volt batteries and then devolpe 67 or 90 volts ? I need to concerned about current which is low but still a concern, the plate voltage ..vacuum tubes. Thanks

[techguy7272]

Cool.