[Radioroslyn]

Connect - probe to pin 4 of the battery/ac switch Then measure dcv on pin8 of the 1BL4 Should see your 10. vdc there. Check all 1.5 v tubes for filament continuity. That means check resistance between pins 1 and 8. all should show a low resistance like a few ohms. Check #48 and 46 could be a little high or you've got some bad paper caps pulling the HV down.
Cln tube sockets and replace the rest of the caps.
Terry