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Quality 6F4P Triode-Phentode tubes
Equivalent to the ECL84 / 6DX8 / 6DQ8
New, Old Stock
Lot of 6 tubes
Same Date Code 05-1988
Technical characteristics:
Filament voltage ...... 6,3 ± 0,6 in
Heater current ...... 720 ± 60 mA
Triode part:
Nominal voltage of the anode (DC) ...... 200
Anode voltage limit (DC) ...... 250
Anode ...... 3 ± 0,9 mA
Cathode current limit ...... 12 mA
The power dissipated by the anode, the limit ...... 1 W
Slope ...... 4 ± 1 mA /
The gain ...... 65
Resistance in the cathode circuit to automatically bias ...... 600 Ohm
Grid circuit resistance limit ...... 1 M
Input Capacity ...... 4 pF
Output Capacity ...... 0.6 pF
Capacity-through ...... 2.7 pF
Pentode part:
Nominal voltage of the anode (DC) ...... 170
Anode voltage limit (DC) ...... 250
Anode ...... 18 ± 6 mA
Cathode current limit ...... 40 mA
Second nominal grid voltage (DC) ...... 170
A second threshold voltage grid (DC) ...... 250
Grid current second ...... not more than 7 mA
The power dissipated by the anode, the limit ...... 4 W
The power dissipated by the second grid, the limit ...... 1.7 W
Slope ...... 11 ± 9,5 mA / V
Internal resistance ...... 100 k
Resistance in the cathode circuit to automatically bias ...... 100 Ohm
Resistance in the grid of the first limit ...... 1 M
Input Capacity ...... 9.5 pF
Output Capacity ...... 4 pF
Capacity-through ...... not more than 0.1 pF
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