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18 April 2024 


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Type LS7 GPO VT82 / CV1660 Directly Heated Triode

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General Information

Manufactured by the Marconi Osram Company.

Ratings

Heater Voltage  4.0 V Vh
Heater Current 0.15 A Ih
Anode Voltage 150 V Va
Negative Grid Voltage -4 V Vg1
Anode Current 21 mA Ia
Transconductance 2.4 Ma/V S
Amplification Factor 12   µ
Anode Impedance 5 kΩ Ri †

*Measured with Va=130 and Vg1 = -4

† note -   A- measured with Va=130 and Vg1 = -4

Inter-electrode Capacitances (Pf)

Grid/Earth 12.00   cge pF
Anode/Eart 12.00   cae pF
Anode/Grid 12.00   cag pF

Dimensions

Maximum overall length 127mm
Maximum diameter 60mm

Mounting Position - Vertical

LS7 GPO VT82 / CV1660 Directly Heated Triode mounting position diagram

BASE - British 4 pin

CONNECTIONS

Pin 1          Anode
Pin 2          Grid
Pin 3          Heater
Pin 4          Heater

LS7 GPO VT82 / CV1660 Directly Heated Triode technical graph

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