Similar low-voltage twin triode for car radio use, but different ratings — not a direct substitute
6N27P
Soviet equivalent (6Н27П) — approximate substitute per foreign_substitutes reference, may differ in parameter spread
ECC813
Related low-voltage twin triode, different ratings per TDSL
Electrical Specifications
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)30V
Anode Dissipation (max)Anode Dissipation (max per section)0.6W
Cathode Current (max)Cathode Current (max)20mA
Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)30V
Max Grid ResistorGrid Resistor (max)
Notes
The ECC86 was specifically designed for hybrid car radio applications where the tube operates directly from a 6V car battery. Both sections are identical.
Typical anode voltage is only 6.3V, with maximum anode voltage of 30V per section — far lower than conventional receiving tubes.
One triode section is typically used as an RF amplifier, the other as a self-oscillating mixer in VHF/FM front-end stages.
Can also operate at 12.6V anode supply (from a 12V car battery) with improved performance: higher gm (4.6 mA/V) and anode current (2.5 mA).
The Philips datasheet is marked 'Tentative data' (Vorläufige Daten), first issued 3.3.1958.
Pin Layout — Noval
1Anode 2
2Control Grid 2
3Cathode 2
Socket-Compatible Tubes ⚠ Not electrically compatible