The vintage Russian 6P14P-EV (6Π14Π-EB in Cyrillic script) tubes in this precisely matched pair are high-reliability EL84 / 6BQ5 type tubes. They have a higher maximum plate voltage and plate dissipation than standard 6BQ5 / EL84 tubes.
These tubes have gray plates and halo getters with triple supports. The Reflector factory logo and OTK inspection code are printed on the glass.
Both tubes test as new. They are matched for both current draw (mA) and transconductance (Gm). They ship in their original boxes with test results.
These tubes are sold as a matched pair. Photo is a sample pair from the lot.
6P14P, 6P14P-V, 6P14P-EV
(6n14n, 6n14n-B, 6n14n-EB)
General
Pentode for output stages of low frequency amplifiers.
Envelope: miniature, glass.
Mass 20 g.
Lead diagram
General characteristics:
| Type |
6P14P |
6P14P-V |
6P14P-EV |
| Filament voltage, Volt |
6.3 |
6.3 |
6.3 |
| Anode voltage, Volt |
250 |
250 |
250 |
| 2nd grid voltage, Volt |
250 |
250 |
250 |
| Resistance in cathode circuit, Ohm |
120 |
120 |
120 |
| Type |
6P14P |
6P14P-V |
6P14P-EV |
| Filament (heater) current, mA |
760±60 |
760±60 |
760±60 |
| Anode current, mA |
48±8 |
48±8 |
48±8 |
| 2nd grid current, mA |
5 |
5 |
5 |
| Reverse 1st grid current, mkA |
£ 1 |
£ 1 |
£ 1 |
| Dissipate cathode-heater current, mkA |
£ 25 |
£ 25 |
£ 25 |
| Mutual conductance, mA/V |
11.3 |
11.5 |
11.5 |
| Output power (by RA=5.2Kohm), W |
4.2 |
4.3 |
4.3 |
| Non-linear distortion, % |
8 |
8 |
8 |
| Internal resistance, Kohm |
- |
- |
- |
| Equivalent noise resistance, Ohm |
|
|
300 |
Inter electrode capacitance, pF:
input |
11 |
11±2.5 |
11±2.5 |
| output |
7 |
8±2 |
8±2 |
| transfer |
£ 0.2 |
0.75-0.4 |
0.75-0.4 |
| Operation time, h |
3000 |
1000 |
5000 |
Limited operating values:
| Type |
6P14P |
6P14P-V |
6P14P-EV |
| Filament voltage, V |
5,7-7 |
5,7-7 |
5,7-7 |
| Anode voltage, V |
300-400 |
300-500 |
300-500 |
| 2nd grid voltage, V |
300 |
300-500 |
300-500 |
| Cathode - heater voltage, V |
100 |
200 |
200 |
| Cathode current, mA |
65 |
65 |
65 |
| Anode dissipation, W |
14 |
14 |
14 |
| 2nd grid dissipation, W |
2.2 |
2 |
2 |
| Resistance in 1st grid circuit, MOhm |
1 |
1 |
1 |
Operating environmental conditions :
| Type |
6P14P |
6P14P-V |
6P14P-EV |
| Acceleration of vibration loads, g |
2.5 |
6 |
10 |
| by frequencies, Hz |
50 |
5-600 |
5-600 |
| Acceleration of multiple impacts, g |
35 |
150 |
150 |
| Acceleration of single impact, g |
-- |
300 |
300 |
| Ambient temperature, °С |
-60 to +70 |
-60 to +70 |
-60 to +70 |
| Relative humidity at up to 40°C, % |
98 |
98 |
98 |
Plate-grid and plate curves of 6P14P
Plate-grid and plate curves of 6P14P-EV
