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Telefunken EL41 Tube NOS / NIB Sealed
Telefunken EL41 Tube NOS/NIB (sealed box, see photo) Late 40s and 1950s power pentode. Found in many smaller Siemens tube amps and table radios. The EL41 disappeared (as almost all Rimlock socket tubes) when the noval socket tubes were introduced, especially the EL84.