17AX4

Rectifier — Octal

Tung-Sol

Known Equivalents & Substitutes

17AX4GT17AX4GTA

Similar Tubes (Not Drop-In Compatible)

12AX4GTA

Same damper diode family but 12.6V heater — not a drop-in due to different heater voltage

Same damper diode family but 25V heater — not a drop-in due to different heater voltage

Identical function and pinout but 6.3V heater — not a drop-in due to different heater voltage

Electrical Specifications

Absolute Maximum

Anode Dissipation (max)Plate Dissipation (max)5.3W

Heater-to-Cathode Voltage (max)Peak Heater-Cathode Voltage (heater negative)5,000V

Rectifier

Peak Inverse VoltageMaximum Peak Inverse Plate Voltage4,400V

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

Notes

Tung-Sol tentative data, August 1, 1960, Plate #5959. Intermediate-shell 5-pin Octal base, glass T-9 bulb, basing 4C6.
Coated unipotential cathode. Any mounting position.
Interelectrode capacitances (approx., without external shield): cathode-to-plate-and-heater 8.5 pF, plate-to-cathode-and-heater 5.0 pF, heater-to-cathode 4.0 pF.
Peak heater-cathode voltage: heater positive — 100V DC, 300V total DC and peak; heater negative — 900V DC, 5000V total DC and peak.
Heater warm-up time approximately 11.0 seconds.
Tube voltage drop at Ib=250 mA DC: 32V.
Operation as a power rectifier is not recommended.

Pin Layout — Octal

2Internal Connection — Do Not Use

3Cathode

5Plate (Anode)

7Heater

Socket-Compatible Tubes ⚠ Not electrically compatible

References

DC Output Current (max)

165mA

Peak Anode Current (surge)Steady-State Peak Plate Current1,000mA

Heater

Heater VoltageHeater Voltage16.8V

Heater CurrentHeater Current0.45A

Heater