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You don't have to solder 9-volt batteries together. To make up a B battery out of 9-volt ones: get a 9-volt snap-on connector with leads and cut it in two, so you have two separate snaps, and put them aside. Then take your batteries and snap the + of one onto the - of the next one and so on until they add up to the voltage you want (e.g. 7 batteries x 9 volts = 63 volts, etc.) You will find that the batteries line up and you can rubber band or tape them together into a bundle. You will end up with an unused terminal on the first battery in your series and another on the last one. Snap on the connectors and wire in.
Your radio sounds like a sort of novelty set using something like hearing aid tubes, could be from very late 40's or early 50's, before transistors came in during the late 50's.
Reece
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Reece
Perfection is hard to reach with a screwdriver.
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