This is a mystery. The identification is a catalogue number for Beckman Instruments. It looks like the DM160 indicator but equally may be a miniature triode.
The DM160 has four wire connections, this has five. The outer electrodes each have an external connection. The filament is a thin oxide coated strand running the length between the mica sheets.
One end of the filament is connected to the bright tab near the base.The thin glass tube envelope is 9 mm × 7 mm and, excluding the base wires, is 37 mm tall.References: Observation. |
Updated March 29, 2023.
|
|
