I have this kit as yet un-built. (of course)
I built their previous smaller one and was able to just barely get it to record and play something intelligible on an old cd. The same company, Gakken makes a little tube amp kit that I also have. It uses 1V. tubes. B+ is derived from a DC to DC upverter from the filament batteries. It almost works OK as a headphone amp.
BTW, I think most phonographs of the cylinder era were capable of recording as well.