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6W2

Sensibly equivalent to:
R12A
    
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The 6W2 is a half wave EHT rectifier for use with flyback supplies. The rectifier can be used at frequencies at and above 50 kHz. TV line output stages would operate at much lower frequencies - 10 - 16 kHz.
The envelope also is marked as R12A.
The bell anode is fixed at one end and the cathode to the pinch. One side of the heater connects to the cathode tube.
The thin glass tube envelope is 18 mm in diameter and, excluding the base wires, is 53 mm tall.
References: Data-sheet.

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
6.3
0.08
8,500
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 26, 2020.
shape:thin.glass.tube construction:pinch type:rectifier.hw age:1930.1940 base: heater:6.3v pin:
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