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EF183 — Small Signal Pentode, Noval | Tubeofile | Tubeofile

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EF183

Name: EF183
Brand: Philips

Small Signal Pentode — Noval — Philips

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Data: HighHigh quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.

↗ r-type.org ↗ TDSL ↗ Radiomuseum

Known Equivalents & Substitutes

6EH76F29CV5831

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)250V

Screen Voltage (max)Screen Voltage (max)250V

Anode Dissipation (max)Anode Dissipation (max)2.5W

Screen Dissipation (max)Screen Dissipation (max)0.65W

Cathode Current (max)

Notes

Variable-mu (remote cutoff) pentode — not suitable for applications requiring sharp cutoff characteristics. EF184 is the sharp-cutoff equivalent.
Operation with cathode bias resistor and/or screen grid resistor is recommended (per Philips datasheet).
Pin 6 is an internal shield (screen) connected internally — must be grounded for proper RF shielding.
Pins 1 and 3 are both cathode connections.
Vao (anode + screen combined max) is 550 V; Va and Vg2 individual max are 250 V each.
EF811 is listed by TDSL as a substitute with different ratings.

Pin Layout — Noval

1Cathode

2Control Grid

3Cathode

Socket-Compatible Tubes ⚠ Not electrically compatible

6F23 6GK6 AL860 EF184 EF80 EF800 EF805S XF184

References

https://frank.pocnet.net/sheets/010/e/EF183.pdf
https://frank.pocnet.net/sheets/020/e/EF183.pdf

Cathode Current (max)

20mA

Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)150V

Max Grid ResistorMax Grid 1 Resistor1MΩ

Typical Operating

Anode Voltage (typical)Anode Voltage200V

Screen Voltage (typical)Screen Voltage90V

Grid 1 Bias VoltageGrid 1 Bias Voltage-2V

Anode CurrentAnode Current12mA

Screen CurrentScreen Current4.5mA

Anode ResistanceAnode Resistance500,000Ω

TransconductanceTransconductance12.5mA/V

Capacitances

Grid-to-Plate CapacitanceCag1 (Grid-to-Anode Capacitance)0.005pF

Grid-to-Cathode CapacitanceCg1a (Grid-to-Cathode Capacitance)9.5pF

Anode-to-Cathode CapacitanceCa(g1) (Anode-to-Cathode Capacitance)3pF

other

Req (Equivalent Noise Resistance)Req (Equivalent Noise Resistance)490Ω

Cg1g2 (Grid 1 to Grid 2 Capacitance)Cg1g2 (Grid 1 to Grid 2 Capacitance)2.8pF

Vg1 Peak (max negative)Vg1 Peak (max negative)-50V

Rg3 (Max Grid 3 Resistor)Rg3 (Max Grid 3 Resistor)50kΩ

rg1 (Input Resistance at 40 MHz)rg1 (Input Resistance at 40 MHz)13kΩ

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.3A

4Heater

5Heater

6Internal Shield

7Anode

8Screen Grid

9Suppressor Grid