Sensibly equivalent¶ to:
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.
Absolute Maximum Operating Conditions¶
Updated March 19, 2014.