← BrowseData: HighHigh quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
6SQ7GT
Electrically similar duplex-diode high-mu triode but Octal base — not pin-compatible with Loctal75
Predecessor type with similar function (duplex-diode triode) but Octal base7C6
Sams lists as substitute — similar Loctal duplex-diode triode7C8
Raytheon lists as substitute — Loctal duplex-diode triode with different characteristicsElectrical Specifications
Section 1 — High-Mu Triode
Absolute Maximum
Anode Voltage (max)Max Plate Voltage250V
Anode Dissipation (max)Max Plate Dissipation0.5W
Typical Operating
Anode Voltage (typical)Plate Voltage250V
Grid 1 Bias VoltageGrid Voltage-2
Notes
- Nominal heater voltage is 7.0V; typical operating heater voltage is 6.3V.
- The triode section has mu=100 and rp=91000 ohms — high-mu design for voltage amplification.
- Minimum diode current per plate: 0.8 mA at 10V DC applied.
- Maximum plate voltage rating: 250V.
- Tung-Sol datasheet (August 1940) used for specifications.
Pin Layout — Loctal
1Heater
2Plate (Triode)
3Diode Plate #1
4
Socket-Compatible Tubes ⚠ Not electrically compatible