Radio tube 2J27L high frequency pentode with a short characteristic. Designed to amplify high frequency voltage up to 120 MHz in battery powered equipment. Directly heated oxide cathode. Works in any position. Available in glass design with an external screen.
The socket is a special 8-pin with a lock in a special key.
Basic parameters of the 2J27L radio tube
Filament voltage 2.2 V
Filament current 1.9 ± 0.6 mA
Anode current at the beginning of the characteristic < 100 µA
Anode voltage 120 V
Second grid voltage 45 V
Third grid voltage 0 V
The voltage on the first grid is constant 0 V
Second grid current 0.35 + 0.2 mA
First grid reverse current < 0.5 µA
Slope 1.25 ± 0.25 mA/V
Slope characteristic at filament voltage = 2 V > 0.85 mA / V
Internal resistance 700 kOhm
Input impedance 15 kOhm
Equivalent internal noise impedance 6 kOhm
Electronic current cut-off voltage of the first grid -1 ... 0 V
Cathode emission current > 9 mA
Input capacitance 5.3 ± 0.6 pF
Output capacitance 4.9 ± 0.5 pF
Pass Capacitance <0.015 pF
Anode-cathode capacitance <0.01 pF
Dimensions Ø 32 x 75 mm
Weight no more than 15 g