6DQ4 — Diode, Octal | Tubeofile

6DQ4

Diode — Octal

Tung-Sol

Known Equivalents & Substitutes

No known equivalents. If you know of any, use the ⚑ Report Issue button above.

Similar Tubes (Not Drop-In Compatible)

6AS4

Radiomuseum lists as normally replaceable-slightly different — same Octal base family

Same Octal base and JEDEC 4CG pinout but lower ratings (PIV 4400V vs 5500V, Ia 137mA vs 175mA, Pa 5.0W vs 6.0W)

Same Octal base and JEDEC 4CG pinout but lower ratings (PIV 4400V vs 5500V, Ia 155mA vs 175mA, Pa 5.5W vs 6.0W)

Same Octal base and pinout, similar damper diode — verify ratings before substitution

Same Octal base and JEDEC 4CG pinout, similar ratings (PIV 5000V vs 5500V, Ia 175mA, Pa 6.5W vs 6.0W)

6DT4

Radiomuseum lists as normally replaceable-slightly different

Electrical Specifications

Absolute Maximum

Anode Dissipation (max)Plate Dissipation (max)6W

Heater-to-Cathode Voltage (max)Peak Heater-Cathode Voltage (heater negative, total DC+peak)5,500V

Rectifier

Peak Inverse VoltagePeak Inverse Plate Voltage5,500V

Voltage Drop (typical)Tube Voltage Drop (at 250 mA DC)32V

Notes

Short intermediate-shell 5-pin Octal base (B5-85), basing diagram JEDEC 4CG, outline drawing JEDEC 9-41. T-9 glass envelope.
Socket terminals 1, 2, 4, and 6 shall not be used as tie points.
PIV rating of 5500V applies for a 525-line, 30-frame TV system where the duty cycle of the voltage pulse does not exceed 15% of one scanning cycle (10 µs).
Maximum peak heater-cathode voltage: 5500V (heater negative total DC+peak, DC component max 900V) / 300V (heater positive total DC+peak, DC component max 100V).
Operation of this tube as a power rectifier is not recommended by the manufacturer.
Highest PIV rating (5500V) among the JEDEC 4CG family of Octal damper diodes (6AX4=4400V, 6DA4=4400V, 6DM4=5000V).

Pin Layout — Octal

1Internal Connection

2Internal Connection

3Cathode

5Plate

Socket-Compatible Tubes ⚠ Not electrically compatible

References