6P6S — Beam Tetrode, Octal | Tubeofile

6P6S

Beam Tetrode — Octal

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

↗ TDSL ↗ Radiomuseum

Known Equivalents & Substitutes

6V6GT

Similar Tubes (Not Drop-In Compatible)

6AQ5

Electrically similar beam tetrode but miniature B7G base — not pin-compatible

6V6

Metal-envelope version of the same tube type — same Octal base and electricals

7C5

Electrically identical to 6V6 but Loctal base — not compatible with Octal sockets

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)315V

Screen Voltage (max)Screen Voltage (max)315V

Anode Dissipation (max)Anode Dissipation (max)13.2W

Screen Dissipation (max)Screen Dissipation (max)2W

Cathode Current (max)

Notes

6П6С (6P6S) is the Cyrillic designation. The Latin transliteration is 6P6S.
Russian equivalents reference confirms this as the Soviet equivalent of the 6V6GT.
Same Octal base and pinout as 6V6GT — widely used as a direct substitute in Western amplifiers.
Some production lots may exhibit slightly different parameter spreads compared to Western 6V6GT production.
Pin 1 is no connection on glass types; pin 8 is cathode and beam-forming plates.

Pin Layout — Octal

1No Connection

2Heater

3Anode (Plate)

Socket-Compatible Tubes ⚠ Not electrically compatible

12DQ6 12W6GT 25L6GT 350B 5881 6550 6CD6G 6F6 6F6S 6K6 6L6GC 6M6G 6N3C 6V6 6W6

References

https://frank.pocnet.net/sheets/084/6/6P6S.pdf
https://tdsl.duncanamps.com/show.php?des=6V6

Cathode Current (max)

52mA

Typical Operating

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

Screen Voltage (typical)Screen Voltage (typical)250V

Grid 1 Bias VoltageGrid 1 Bias Voltage-12.5V

Anode CurrentAnode Current45mA

Screen CurrentScreen Current4.5mA

Anode ResistanceAnode Resistance52,000Ω

TransconductanceTransconductance4.1mA/V

Output

Output PowerOutput Power4.5W

Load ImpedanceLoad Impedance5,000Ω

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.45A

Screen Grid (g2)

5Control Grid (g1)

6No Connection

7Heater

8Cathode & Beam-Forming Plates