[NostalgiaRadioTime]

I recently picked up a 39-70 farm radio and am looking to build an all enclosed power supply for it. I found a simple design to build the 90 volt "B" supply, but am wondering if there's a way to modify this schematic to include the "A" supply for the 1.5 volt filament string?

   

Here's a link to the schematic for the 39-70:

http://www.nostalgiaair.org/pagesbymodel...013302.pdf

And here's where I found the schematic for the power supply:

https://antiqueradio.org/bsupply.htm

I know you can just use a separate 1.5-volt "D" cell (flashlight battery) to supply the 1.5 but I'd really like to do away with using batteries altogether. If anyone has any idea how to incorporate the 1.5 volt into the above schematic...or any other schematic that has them both... and could sketch it out I would be very grateful.