Sensibly equivalent¶ to:
The VT-90 is the US Government name for the commercial double signal diode Type 6H6. The two separate diodes being mounted close to the glass disc had lower lead inductance that diodes mounted on a conventional pinch and thus could operate at higher frequencies. The 6H6 design found use in radar and television.
The RCA logo.
The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 30 mm tall.
References: Datasheet & 1040. Type VT-90 was first introduced in 1936.
Absolute Maximum Operating Conditions¶
Updated January 14, 2017. shape:thin.metal.tube construction:glass.disc type:double.diode age:1940.1950 base:io heater:6.3v pins:8 pin:1.m pin:2.h pin:3.a(2) pin:4.k(2) pin:5.a(1) pin:6.- pin:7.h pin:8.k(1)