Powers: Uses a microphone in his costume to amplify his voice to scare his enemies.
Bio: (Daring Mystery Comics #7,8, g.a.) Frustrated that America didn't seem to be dealing with crime or Nazi saboteurs, radio operator Jerry Carstairs created a costume with a built in microphone, and went out to fight for justice as the Thunderer.
(All-Winners Comics #6) The Thunderer briefly changed his name (but not his costume) to the Black Avenger.
(Marvel Premiere #29) The Thunderer posed for a newspaper picture alongside a number of other American based heroes.
(Marvels #1) Alongside a number of other heroes, the Thunderer patricipated in an air drop on a Nazi stronghold.
(Captain America #442) The Thunderer attended a reunion of Second World War costumed heroes.