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QQV04-20Sensibly equivalent¶ to:815 QV04-20 VT-287See also:
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The design of this VHF transmitting double beam tetrode follows the American pattern of two separate valves within the envelope.Originally the QQV04-20 was known as the QV04-20 and Mullard changed the nomenclature in December 1948.
The later developments from Mullard were of the newer type with a common cathode. See the QQV03-20.The wide glass tube envelope is 48 mm in diameter and, excluding the IO base pins, is 94 mm tall.References: 1951 Data-sheet, 4065 & 1040. Type QQV04-20 was first introduced in 1948. See also 1948 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc | tc |  h | g1(2) | k,bp,s | g2 | hct | ic | g1(1) | h | a(1) | a(2) |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | Pdriv | Pout | Pdiss | freq | f.max | 
| 6.3 | 1.6 | 400 | 145 | -45 | 75 | 8.5 | 0.23W | 44W | 10W | 125MHz | 200 |
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PDF scanned from an original document held by the museum |
Updated November 09, 2017.
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