Quality Russian 6F12P triode-pentode tube. Near equivalent to the ECF80 (different connections). Made for military equipment.

Name: 6F12P / 6Ф12П

Type: triode-penthode

Application: LF and HF amplification

Cathode type: oxide, indirect heating

Envelope: glass, miniature

Mass, g: 12,5

Filament voltage, V: 6,3

Filament current, A: 0,3-0,36

Anode voltage, V: triode-150/penthode-150

Anode current, A: triode-0,0125/penthode-0,013

Anode power, W: triode-3,5/penthode-5

Grid2 voltage, V: 150

Steepness, mA/V: triode-19/penthode-19

Reverse grid current, uA: 0,2

Microphnic noise, mV: 100

Gain: triode-100/