GLOSSARY OF TERMS USED IN RADIO TELEPHONY – I:
“A” BATTERY – A means of obtaining electricity in storage form for lighting the filaments of a vacuum tube. The A battery can either be a dry cell or a storage battery, depending on the type of vacuum tube used on the receiving set. The dry cell is used for the 1 ½-volt tubes and the storage battery for the 6–volt tubes. A radio storage battery can never be used to start an automobile; however, an automobile battery can be used with a radio set.
AMPLIFICATION – The process of making signals louder.