Cathode-ray tube (CRT ) 8LO29I Oscilloscope. Screen size diameter is 70 mm. Green glow color. Designed for visual registration of electrical processes in various electronic devices.
TG3-0.1/1.3 Thyratrone Tube. Low-power fast-acting thyratron tube with the xenon filling. A cathode is an oxide, indirect incandescence. Equivalent ~ 2D21 / 5727 / PL21.
Triode 6S33S High-Quality Russian audiophile tube. Used in Hi-End audio amplifiers. Designed to work as a regulatory tube in electronic voltage regulators