CV1501 — Beam Tetrode, Octal | Tubeofile

CV1501

Beam Tetrode — Octal

Known Equivalents & Substitutes

CV1002E1192TT11VT501

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Max Anode Voltage300V

Screen Voltage (max)Max Screen Voltage250V

Anode Dissipation (max)Anode Dissipation (max)7.5W

Screen Dissipation (max)Screen Dissipation (max)1.3W

Cathode Current (max)Cathode Current (max)45mA

Typical Operating

Anode Voltage (typical)Anode Voltage (typical)250V

Screen Voltage (typical)Screen Voltage (typical)135V

Grid 1 Bias VoltageGrid 1 Bias Voltage-11V

Anode CurrentAnode Current30mA

Screen CurrentScreen Current

Output

Output PowerOutput Power4.8W

Load ImpedanceLoad Impedance4,100Ω

Capacitances

Grid-to-Plate CapacitanceAnode-to-Grid Capacitance (Cag)0.4pF

Input CapacitanceGrid-to-Earth Capacitance (Cge)9.1pF

Output CapacitanceAnode-to-Earth Capacitance (Cae)2.6pF

Noise / RF

Max Operating FrequencyMax Operating Frequency200MHz

other

Grid-Screen Amplification FactorGrid-Screen Amplification Factor6.7

Driving PowerDriving Power0.12W

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.8A

Notes

Top-cap anode connection — not a standard octal pinout. Pin 6 is omitted (blank pin may be supplied at manufacturer's discretion).
Pin 3 (beam forming plates) should be connected to cathode for normal operation.
Originally designed as an RF power amplifier for VHF military transmitters (up to 200 MHz), but was widely used as an audio output valve in post-war TRF broadcast receiver kits due to cheap surplus availability.
Grid-screen amplification factor (mu_g1g2) is 6.7 — this is not the overall amplification factor but the ratio between control grid and screen grid.
Specification MAP/CV1501/Issue 8, dated 10.3.47, to be read in conjunction with K1001. Manufactured by multiple UK firms including ETEL (Electronic Tubes, High Wycombe) and Gilbert Photoelectrics.

Pin Layout — Octal

1No Connection

2Heater

3Beam Forming Plates (Suppressor Grid)

References