TUBEOFILE
EC88 — Small Signal Triode, Noval | Tubeofile
← Browse Philips Medium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.
Known Equivalents & Substitutes
6DL4
Similar Tubes (Not Drop-In Compatible)
Similar UHF triode — related but different characteristics Series-heater version (300 mA) — same Noval base and pinout but different heater voltage Electrical Specifications
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 160V
Typical Operating
Anode Voltage (typical) Anode Voltage (typical) 160V
Grid 1 Bias Voltage Grid 1 Bias Voltage -1.25V
Anode Current Anode Current 12.5mA
Notes
Frame-grid construction provides very high transconductance (13.5 mA/V) in a compact structure. Designed for operation up to 1000 MHz — suitable for UHF TV tuners and VHF/UHF oscillators. Brans Vademecum lists EC88 with 6EU8 and PC88 as equivalents. Low heater power: 6.3 V / 165 mA (approximately 1 W). Pin Layout — Noval
1 2 3 4 5 6 7 8 9
1 Anode
2 Cathode / Screen
3 Heater
Anode Resistance Anode Resistance
4,800Ω
Transconductance Transconductance 13.5mA/V
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 0.165A
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 160V
Typical Operating
Anode Voltage (typical) Anode Voltage (typical) 160V
Grid 1 Bias Voltage Grid 1 Bias Voltage -1.25V
Anode Current Anode Current 12.5mA
Anode Resistance Anode Resistance 4,800Ω
Transconductance Transconductance 13.5mA/V
Amplification Factor (μ) Amplification Factor (μ) 65—
Capacitances
Grid-to-Plate Capacitance Grid-to-Plate Capacitance 1.2pF
Grid-to-Cathode Capacitance Grid-to-Cathode Capacitance 3.8pF
Anode-to-Cathode Capacitance Anode-to-Cathode Capacitance 0.055pF