NOS Soviet 4P1L pentodes.

Matched pair (2 tubes) in each lot.

Some pairs may have same date of production (50s, 60s, 70s and 80s).

Tested and matched using L3-3 tester.

Produced at Svetlana factory.

We ship via International Airmail from Kyiv.

Tracking number is provided.

 

4P1L – Pentode radio tube designed for frequency amplification and generation.

Technical characteristics of 4п1л

Voltage (series connection) – 3.9.4.7V

Anode voltage – 250V

Second grid voltage – 250V

Maximum power on the anode – 7.5W

Maximum power on the second grid – 1.5W

Resistance in the first grid circuit – 500kΩ

Resistance in the third grid circuit – 100kΩ

Cathode current – 50mA

Operating frequency – 100MHz