4x New 6N28B-V 6Н28Б-В Dual Mini Triode / Soviet / High Durability / NOS

Vibration-resistant ultra-miniature design, high reliability, 22x gain, 6.75mA/V

The best Soviet dual mini triode 6N28B-V.

The tubes are new and have never been used.

Four tubes in one lot.

Increased mechanical strength and durability.

Dual ultra-miniature vibration-resistant triode of increased reliability.

Designed to amplify low frequency voltage and generate high frequency oscillations.

6.3 V filament voltage

Glow current 0.25 A

Anode voltage 50 V

Anode Current 7 mA

Grid voltage -1 V

Slope 6.75 mA / V

Gain 22

Interelectrode capacitances of a tube 6N28B

Input 3.3 pF

Output 2.2 pF

Feed-through 2 pF

Between anodes 0.1 pF

Maximum operating data of tube 6N28B:

The highest voltage of the anode is 150 V

Maximum power dissipated by the anode 0.9 W

• The highest voltage on the anode with the lamp locked, V 300

• The voltage in the grid circuit is negative, V -150

• The highest current in the cathode circuit, mA 15

• The highest voltage of the cathode-heater, V 150

• The highest resistance in the grid circuit, mOhm 2