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R19

Sensibly equivalent to:
1X2B CV5427
See also:
Brimar TV Valves Advert
    
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The R19 is an EHT rectifier for television service. The anode voltage quoted is the peak inverse voltage and this is important in a television EHT generator as the waveform is pulsed and not a sine wave.
The R12 has a higher specification than the 1X2B and can be used as a direct substitute for the 1X2B.
The filament screen can be seen below the anode as a circular plate with a central hole for the filament.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 62 mm tall.
References: Datasheet & 1040.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
tc
s
f
-
s
f
s
-
f
f
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
1.25
0.2
25,000
2.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 31, 2012.
shape:thin.glass.tube construction:all.glass type:rectifier.hw age:1950.1960 base:b9a pins:9 pin:1.s pin:2.f pin:3.- pin:4.s pin:5.f pin:6.s pin:7.- pin:8.f pin:9.f pin:tc.a
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