>>252
それの現代物で大抵の電池管ラジオに使えるやつあったな・・・と思ったが、これだこれ。
https://www.arbeiii.com/
A Supply:
Adjustable from 1.25 to 6.5 VDC@2.5 amperes continuous, 3.25 amperes intermittently.
B Supply:
Fixed output voltages: 22,45,67,90,135 VDC up to 60 ma maximum (total)
C Supply:
Fixed output voltages -4.5,-9,-22 VDC up to 20ma