The Marconi VDS is a variable μ RF pentode with a control grid range of -0.5 to -30.0 Volts. The heater rating suggests that it was used in AC/DC mains superhet radio sets.
The Marconi brand and Made in England.The balloon envelope is 45 mm in diameter and, excluding the B5 base pins, is 120 mm tall.Reference: 1043. Type VDS was first introduced in 1932. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | tc |  g2 | g1 | h | h | k,g3 | a |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 16.0 | 0.25 | 200 | 80 | - | 11.0 | 1.2 | 0.25M | 2.4 |
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Updated August 21, 2020. shape:balloon construction:pinch type:pentode age:1930.1940 base:b5 pins:5 pin:1.g2 pin:2.g1 pin:3.h pin:4.h pin:5.k.g3 pin:tc.a
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