EBL31, MULLARD, CV2926 FOR EKCO A21 A22 A23 A28
The EBL31 is a double diode and sensitive output pentode. The valve was designed for use in domestic superhet radio receivers and sees extensive use in a lot of prized Ekco sets. This one has been used but tests at full emission.
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ECC82, MULLARD, NEW SHIELD, WHITE PRINT, Gf2 B1C1, BLACKBURN, MARCH 1971 MANUFACTURE
ECC83, Mullard, I63 B0J4, Mullard, White Print, Blackburn Manufactured, October 1960