These free plans will guide your through making an emergency battery operated radio kit
These plans are an improved wartime version of other two tube "hurricane" emergency receivers. It requires no B-battery, instead using any 6-volt battery like that would have been used in automobiles at the time.
Under blackout conditions in localities where a power line supply would not be available for operating standard receivers, the nearest car would power your emergency radio.
These plans call for two low-drain tubes that require only .15 amp.