MATCHED PAIR 6P3S-E (6П3С-Е, 6P3S-E, 6L6, 5881, 6L6G). TUBES BOXED. 

Gilded first Grid, the tube contains 1.942 mg of gold. Same date.

USSR TUBES – LAST LETTERS (suffix) MEANING:

V (B) - Tubes of increased reliability and mechanical strength.

E - Long-life tubes with guaranteed life of more than 5,000 hours.

EV (EB) - Tubes of increased reliability, mechanical strength guaranteed life of more than 5,000 hours.

D (Д) - Extremely durable tubes with guaranteed life of more than 10,000 hours.

DR (ДР) - Tubes of special, very high reliability, mechanical strength, and guaranteed life of more than 10,000 hours.

I (И) - Tubes designed to operate in pulsed mode, characterized by increased emissivity of the cathode.

K - Tubes with high vibration resistance.

R (P) - Tubes of special, very high reliability, mechanical strength.

OS (ОС) – Tubes special assembly (for the aviation industry).

Specifications and electrical parameters :

• Filament voltage: 6.3 ± 0.6V
• Filament current: 900 ± 60mA
• Anode voltage nominal: 250V
• Anode voltage limit: 400V
• Anode current: 72 ± 14mA
• Grid voltage of the first: -14V
• Reverse current grid first: 3.0uA
• Grid voltage second nominal: 250V
• Grid voltage second limit: 300V
• Grid current second: 8mA
• Power dissipated by the anode, limiting: 20.5W
• Power dissipated by the second grid, limit: 2.75W
• The voltage between the cathode and the heater limit: 200V
• Slope: 6 ± 0.8mA/V
• Output power: 5.4W
• Resistance in the grid circuit of the first limit: 0.5 MOhm
• Input capacitance: 11 ± 2pF
• Output capacitance: 8.2 ± 1.5pF
• Capacitance pass: 1pF

Operating time not less than 5000 hours

MATCHED PAIR 6P3S-E

https://www.ebay.com/itm/284988183873 

MATCHED PAIR 6P3S

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