Russian audiophile 4P1L tube with direct heating & lowest anode voltage. The pentode is fine up to 100 Mc/s. Made by SVETLANA plant. Equivalent to the 4L1S / 4LS1. Copy of RL2 / 4P6 Wehrmacht tubes.

Name: 4P1L;

Type: pentode;

Application: oscillation and power amplification up to 100MHz;

Cathode type: oxide,direct heating;

Envelope: glass;

Mass, g: 35;

Filament voltage, V: 2,1/4,2;

Filament current, A: 0,65/0,325;

Anode voltage, V: 150;

Anode current, A: 0,06;

Anode power, W: 7,5;

Grid2 voltage, V: 150;

Grid3 voltage, V: 0;

Steepness, mA/V: 4,5-7,8;

Microphonic noise, mV: 500;

Socket type: rsh7.

NOS & NIP