EF37 CV358 KB/DA brown base metalized glass best pentodes code on base
EF37 CV358 brown base £ 100 quartet.
Description
The Mullard EF37 valve is a high impedance screened pentode made for frequency amplifier.
It was a very popular pentode used in radios and amplifiers back in 1940s.
The EF37 (and EF36) is the father of the later Mullard EF86.
The valves shown here are military version of the common EF37 labeled CV358.
Brown base, with codes 1284 K2;1284 E3; 1284 1F4; 1284 H3
All four EF37 valves have been tested at full 100% emission and in working order.
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