← 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
6AT6ADH77EBC90CV4526066
Similar Tubes (Not Drop-In Compatible)
Similar duplex-diode triode on B7G base — close substitute Same duplex-diode triode structure and B7G base but lower mu (100 vs 70) — different bias points Similar duplex-diode triode on B7G base — substitute in some circuits Electrical Specifications
Section 1 — Triode
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)300V
Anode Dissipation (max)Anode Dissipation (max)0.5W
Typical Operating
Anode Voltage (typical)Anode Voltage (typical)250V
Grid 1 Bias VoltageGrid Voltage-3
Notes
- The triode section has mu=70, Rp=58kΩ, Gm=1200 umhos at Va=250V, Vg=-3V.
- Widely used in AM broadcast receivers as a combined detector, AVC, and first audio amplifier.
- The European designation is EBC90 (Mullard) or DH77 (Brimar). CV452 is the British military equivalent.
Pin Layout — B7G
1Diode Plate 1
2Grid (triode)
3Heater
4
Socket-Compatible Tubes ⚠ Not electrically compatible