2 WARDS Super Airline 30 Vacuum Tubes. The type 30 tube was used in radios from the 1920’s, 30’s & 40’s. Hickok TV-7D/U tests read 46 and 48.
2 WARDS Super Airline 30 Vacuum Tubes. The type 30 tube was used in radios from the 1920’s, 30’s & 40’s. Hickok TV-7D/U tests read 46 and 48.