1832 tube Globe Verstärker Kraftverstärker Telefunken Ke239 Valve Lampe 1920's

mono plate

black plate

hanging filament

BROWN base

oldest production

cup getter upper

Valve Lampe PHILIPS manufactured in HOLLAND

fully tested strong emission results = 70mA (good at 50mA) POWER VACUUM RECTIFIER  employed in power Amplifier 1930's