6AT6

Compound (multi-section) — B7G

RCA

Known Equivalents & Substitutes

6AT6ADH77EBC90CV4526066

Similar Tubes (Not Drop-In Compatible)

6AQ6

Similar duplex-diode triode on B7G base — close substitute

6AV6

Same duplex-diode triode structure and B7G base but lower mu (100 vs 70) — different bias points

6BK6

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

References