Hi,
I have attached a schematic for your radio at–
https://www.nexicom.net/~oidar/rogersb510.pdf
Unfortunately the schematic is poor due to the very poor quality of the original schematic in the Rogers manual.
Check the chassis layout and parts list your bulb may be used as a fuse, one is indicated.
The tubes are Rogers Spray Shielded types and I would keep them if the radio plays with them as they can be quite rare. The waxed paper tubular capacitors along with electrolytic capacitor should be replaced before using the radio.
Ed.