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HL41Sensibly equivalent¶ to:3A/204D CV24
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The HL41 is an externally screened mains operated amplifier triode of medium impedance. It was designed as an oscillator or RCC amplifier. At the time Mazda had a passion for applying metallisation to valves even if it was not indicated electrically.This device was aimed at being the first audio stage in a TRF radio receiver or a superhet with external signal detection. The HL41/DD added a pair of signal diodes to the triode amplifier.The reverse is plain zinc paint.The classic envelope is 33 mm in diameter and, excluding the MO base pins, is 79 mm tall.References: Data-sheet, 1040 & 1043. Type HL41 was first introduced in 1938. See also 1938 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | h | k | a | nc | g1 | m | nc | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm |
| 4.0 | 0.65 | 250 | -4.5 | 7.0 | 11,500 | 3.1 |
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Updated January 06, 2022.
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