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CV2299Sensibly equivalent¶ to:
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The CV2299 specification was based on the VX8092 and the Mullard DL73 is the commercial version. It is a dry battery output pentode, but made as a beam tetrode. It is similar to the DL71 and DL72 hearing aid output valves but delivers a significantly greater output. The anode resistance of 16,000 Ohms is only 10% of the other similar valves but audio is not the main application unless as a modulator.The CV2299 is specified for use as a VHF transmitter power amplifier. One Watt does not seem much but at 200 MHz would have a range of a few miles in an urban environment and in open country a few tens of miles with an efficient aerial. As a personal radio with a whip aerial the range would be much less but still useful.The filament is a single strand of oxide coated wire, the tension spring can be seen on the left.The anode consists of a grey plate formed into two active areas and two smaller straps. Within the straps can be seen a bright plate, this is the beam plate.The thin glass tube envelope is 10 mm in diameter, and excluding the B8D base pins is 42 mm tall.References: Data-sheet & 1040. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ic | g1 | nc | f-,g3 | f+ | nc | a | g2 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 1.25 | 0.2 | 100 | 100 | -9 | 15 | 3.8 | 16,000 | 2.5 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | Pdiss | Pout | freq |
| 1.25 | 0.2 | 150 | 75 | -2 | 18.6 | 5.6 | 2.0W | 1.2W | 200 |
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Updated January 04, 2022.
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