17AX4

Name: 17AX4
Brand: Tung-Sol

Rectifier — Octal — Tung-Sol

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Data: HighHigh quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.

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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

25AX4

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

6AX4

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