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DDA/13L

Sensibly equivalent to:
2D13A
    
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The DDA/13L from Radio Record is a double diode on at Ct5 base, the DDA/13 is the same valve but fitted with a B5 base cap. The 13 indicates the heater voltage.
This small double diode will have been designed for signal rectification and not as a power rectifier.
The standard way of identifying a non-uk produced product.
The classic envelope is 26 mm in diameter and, excluding the Ct5 base pins, is 80 mm tall.
Reference: 1043. Type DDA/13L was first introduced in 1935.

 

Pin Connections
Ct5
1
2
3
4
5
a(1)
h
h
k,m
a(2)

 

Absolute Maximum Operating Conditions
Diode
Vh
Ah
Va
mAa
13.0
0.2
200
0.8
Updated March 19, 2014.
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