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ATTENTION: Some tubes have some SCRATCHES ON THE CARBOLITE BASES

Tubes can be produced in different years 1950-1980`s. Factory manufacturer - Reflektor or Foton (my choice).

Made in the USSR

The 6P3S output beam tetrode are miniature devices enclosed in glass bulb and are provided with a octal (8-pin) base, rigit leads and an indirectly heated oxide-coated cathode.

 Best Quality, the Sound is nice - authentic vintage tone. Long-life no less than 5000 hrs.

CANNOT BE USED IN MODERN GUITAR AMPLIFIERS and AMPLIFIERS REPLACING 6L6GT 

General characteristics:

Type: 6P3S

Filament voltage, Volt: 6.3

Anode voltage, Volt: 250

1st grid voltage, Volt: -14

2nd grid voltage, Volt: 250

Filament (heater) current, mA: 900±90

Anode current, mA: 72±18

2nd grid current, mA: no more than 9

1st grid reverse current, mkA: 3

Cathode current, mA: no less than 275

Output power, W: no less than 5.4

Mutual conductance, mA/V: 5.2 to 6.8

Internal resistance, kΩ: 25

Inter electrode capacitance, pF:

- input: 11±2

- output: 8.2±1.5

- transfer: no more than 1

Operation time over, h: 4000

Limited operating values:

Filament voltage, V: 5,7-7

Anode voltage, V: 375

2nd grid voltage, V: 300

Cathode - heater voltage, V: 100

Anode dissipation, W: 20

2nd grid dissipation, W: 2.75

Resistance in 1st grid circuit, kΩ: 500

 Noise effect is minimized.

 Great sound!

This never been used, from the old stock.