TUBEOFILE
5879 — Small Signal Pentode, Noval | Tubeofile
← Browse GE High quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
6267
Same tube as EF86 — same electricals but incompatible pinout Similar sharp-cutoff pentode but Loctal base — not pin-compatible Similar low-noise AF pentode but different Noval pinout — not a drop-in substitute Electrical Specifications
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 300V
Screen Voltage (max) Screen Voltage (max) 150V
Anode Dissipation (max) Anode Dissipation (max) 1.25W
Screen Dissipation (max) Screen Dissipation (max) 0.5W
Heater-to-Cathode Voltage (max)
Notes
Designed specifically for low-noise audio preamplifier applications — lower noise than general-purpose pentodes. Used in early Fender amplifiers (Tweed Champ, Princeton, Deluxe) as the first preamp stage. No direct pin-compatible equivalent exists. The EF86/6267 has similar electricals but a different pinout. Pin 1 is an internal shield connection and should be grounded for minimum noise. Pin Layout — Noval
1 2 3 4 5 6 7 8 9
1 Internal Shield
2 Anode
3 Screen Grid (g2)
Heater-to-Cathode Voltage (max)
100V
Typical Operating
Anode Voltage (typical) Anode Voltage (typical) 250V
Screen Voltage (typical) Screen Voltage (typical) 100V
Grid 1 Bias Voltage Grid 1 Bias Voltage -3V
Anode Current Anode Current 1.8mA
Anode Resistance Anode Resistance 1,000,000Ω
Transconductance Transconductance 1mA/V
Capacitances
Grid-to-Plate Capacitance Grid-to-Plate Capacitance 0.005pF
Input Capacitance Input Capacitance 4.5pF
Output Capacitance Output Capacitance 3pF
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 0.15A