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CV753Sensibly equivalent¶ to:1A3 1D13 DA90
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The CV753 is a miniature diode on a B7G base and features a 1.4 Volt indirectly heated cathode. The prototype was the 1A3. Normally dry battery valves are directly heated. Such a valve would find applications where the cathode is not taken to ground or where the filaments of other valves are run in series from a higher voltage supply. Two such valves could be used in a discriminator in an FM radio in the 1950s.This valve is from the 1940s yet the heater wire is a single thread running vertically through the anode cavity, just as the earliest valves were made.The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 45 mm tall.References: Datasheet & 3002. Type CV753 was first introduced in 1943. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |  h | a | k | - | - | a | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | mAa | 
| 1.4 | 0.15 | 117 | 0.5 |
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Updated October 08, 2013. shape:thin.glass.tube construction:all.glass type:diode age:1940.1950 base:b7g heater:1.4v pins:7 pin:1.h pin:2.a pin:3.k pin:4.- pin:5.- pin:6.a pin:7.h
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