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DVSG tube: datasheets and technical data
Explore available pinout, electrical data and related types for the DVSG vacuum tube.
The Cossor D.V.S.G., indexed as DVSG, is a variable-mu screen-grid tetrode for DC mains apparatus. Heating is indirect, at 16 V and 0.25 A. The technical page explicitly presents it for high-frequency amplification with bias volume control: varying grid voltage varies amplification. The manufacturer describes this system as convenient and without adverse effects on tuning or quality, an application assessment rather than a numerical distortion measurement.
Maximum plate voltage is 200 V and screen voltage 100 V. The stated characteristics instead use screen 80 V and plate 200 V: transconductance is 2.8 mA/V at grid 0 V and 2.5 mA/V at −1.5 V. The latter condition gives plate current 7.5 mA. Variable bias spans −1.5 to −35 V and is not recast as a single cutoff voltage. The curve shows plate current against negative grid voltage.
The source emphasizes a circuit consideration: since changing bias also changes screen current, the screen supply should use a suitable potential divider or potentiometer to keep its voltage appreciably constant. No component value is specified. Archive data identify a European five-contact B5 base and top contact; the page gives neither numbered connections nor mechanical dimensions. No connections or dimensions are added by analogy. Documentation: Cossor, Cossor D.V.S.G., catalogue page 93, description, data and curve; no certain publication date.
Pinout and connections
Base: British 5-pin (B5)
Electrical data
Heater
- Heater voltage Vh
- 16 V
- Heater current Ih
- 0.25 A
Datasheet PDF
EL84 ECC83 12AX7 EL34 6L6GC 300B KT88 GZ34
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