G'day Digger,
be very careful about applying any power to the old wireless, as you risk frying the circuitry/components. It's operating voltage needs to be carefully determined, and also whether positive or negative earth.
Unless it has been re-furbished the 'insides' are getting brittle, caps leaking, and wiring corroded etc.:o
Only proceed with caution ! Send me a PM for further advice.
Harry (electronics tech)

