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R18

Sensibly equivalent to:
CV2235 EY84
    
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The R18 is a high performance single rectifier with an anode voltage of 625 Volts. At these voltages a full wave rectifier configuration is easier to implement with two valves rather than a pair of valves in a single envelope.
The rated reservoir capacitor is 24 µF and to limit surges the circuit series resistance needs to be at least 250 Ohms.
See also The Mullard EY84 which is very similar.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 74 mm tall.
References: Datasheet & 1040.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
tc
ic
ic
k
h
h
ic
ic
ic
ic
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
6.3
1.15
625
125
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 18, 2013.
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