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About Item: LOT OF 2 (two) TESTED and STRONG MATCHED NОС Russian Tube 6Н9С.

The tubes has an analog 6N2P (6Н2П) tubes. Both lamps are interchangeable. Schemes of using 6N2P tubes and 6N9S same.

Condition: It is new tubes directly from the same wholesale factory box. Surplus of military equipment, only great condition. Picture is of actual items, or similar type. Each tube in original box.

100 % TESTED and STRONG MATCHED – Tester L3-3.

DIFFERENCE = 0 %

Uf = 6,3 V, Ug1 = - 2 V, Ua = 250 V

Strong matched
N: Tube 1 Tube 2 units
Ia1 Ia2 Ia1 Ia2
1 1.8 1.8 1.8 1.8 2
2 1.8 1.9 1.8 1.9 4
3 1.8 2.1 1.8 2.1 2
4 1.9 1.8 1.9 1.8 4
5 1.9 1.9 1.9 1.9 10
6 1.9 2.0 1.9 2.0 8
7 1.9 2.1 1.9 2.1 8
8 2.0 1.8 2.0 1.8 2
9 2.0 1.9 2.0 1.9 16
10 2.0 2.0 2.0 2.0 34
11 2.0 2.1 2.0 2.1 20
12 2.0 2.2 2.0 2.2 10
13 2.0 1.8 2.0 1.8 4
14 2.1 1.9 2.1 1.9 10
15 2.1 2.0 2.1 2.0 20
16 2.1 2.1 2.1 2.1 32
17 2.1 2.2 2.1 2.2 4
18 2.1 2.4 2.1 2.4 4
19 2.1 2.5 2.1 2.5 2
20 2.2 1.8 2.2 1.8 2
21 2.2 1.9 2.2 1.9 2
22 2.2 2.0 2.2 2.0 6
23 2.2 2.1 2.2 2.1 14
24 2.2 2.2 2.2 2.2 12
25 2.2 2.3 2.2 2.3 4
26 2.2 2.4 2.2 2.4 2
27 2.3 1.9 2.3 1.9 2
28 2.3 2.0 2.3 2.0 4
29 2.3 2.1 2.3 2.1 10
30 2.3 2.2 2.3 2.2 8
31 2.3 2.3 2.3 2.3 8
32 2.4 2.0 2.4 2.0 4
33 2.4 2.2 2.4 2.2 4
34 2.4 2.3 2.4 2.3 2
35 2.4 2.5 2.4 2.5 2
36 2.5 2.0 2.5 2.0 2
37 2.5 2.1 2.5 2.1 2

Please, write us what tube(s) 1 or 2, or …  you have chosen?

Used in pre-amplification stages in the resistance and phase inverter stages, as well as instrumentation.

Oxide cathode is indirectly heated.

Works in any position.

Available in glass design.

The service life of at > 500 hours.

Cap octal with the key. Pin 8.

Interelectrode capacitance:

- The input of the first triode 3 pF;

- The input of the second triode 3,4 pF;

- The output of the first triode 3,8 pF;

- The output of the second triode 3,2 pF;

- Straight through the first triode 2,8 pF;

- Straight through the second triode 2,8 pF.


Nominal electrical data (for each triode):

Filament voltage 6,3 V.
The voltage at the anode 250 V.
The bias voltage on the grid – 2 V.
Heater current  300 ± 25 mA.
The current in the anode circuit 2,3 ± 0,9 mA.
Mutual conductance 1,6 ± 0,4 mA/V.
Internal resistance 44 kOhms.<
Gain .......... 70 ± 15.

Maximum permissible electrical values:

The maximum filament voltage 7 V.
The lowest filament voltage 5,7 V.
The maximum voltage at the anode 275 V.
Maximum power dissipation at the anode 1,1 W.
The maximum resistance in the first grid 500 kOhms.
The highest DC voltage between the cathode and heater 100 V.
The highest leakage current between the cathode and heater 20 µA.

The main electrical data at a low anode voltage:

(For each triode)
The voltage at the anode in the 26 V.
The bias voltage on the first grid  -0,5 V.
Mutual conductance 0,8 mA / V.
Anode current 0,2 mA.
The internal resistance 90 kOhms.
Gain 72.

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