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EL41Sensibly equivalent¶ to:67PT 6CK5 CV3889 N150
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The EL41 is an early all glass output pentode. Mullard describe the EL41 as an output pentode rated for 9 watts anode dissipation, and intended primarily for use in AC mains operated equipment. They state that the EL41 should only be used with self-bias or semi-automatic bias.Unlike the first B8A valves that had a metal base cover with locating spigot, this valve has a wider base to the envelope and a locating pip moulded into the glass. It indeed represents the transition point to the final all glass valve. The pins are still equi-spaced in the base and this soon gave way to the B9A and B7G styles that did not require a locating spigot.The thin glass tube envelope is 20 mm in diameter and, excluding the B8A base pins, is 65 mm tall.References: Datasheet & 1040. Type EL41 was first introduced in 1947. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |  h | a | k | k,g3 | g2 | g1 | k | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | Pdiss | Pout | D | 
| 6.3 | 0.7 | 250 | 250 | -7 | 36 | 5.2 | 40,000 | 10 | 9W | 4.2W | 10% |
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Updated January 29, 2013. shape:thin.glass.tube construction:all.glass type:pentode age:1940.1950 base:b8a heater:6.3v pins:8 pin:1.h pin:2.a pin:3.k pin:4.k.g3 pin:5.g2 pin:6.g1 pin:7.k pin:8.h
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