Vacuum Tube - 19T8 / HABC80, Diode, Dual, Triode
New-Old-Stock (NOS) tube.
The 19T8 is a miniature tube containing three high-perveance diodes and a high-mu triode in the same envelope. One of the diodes has a separate cathode connection. The tube is designed for use as a combined AM and FM detector and audio-frequency amplifier. Except for heater rating, the 19T8 and the 6T8 are identical.