MATCHED PAIR. 6J4P ( EF94, 6AU6A, 7543 ) HF pentode NEVZ 1963
TEST: Uh=6,3V, Ua=250, Ug2=150V, Rk=68 OHm
№1 Ia=9,8mA, S=6mA/V, Ig2=3,7mA
№2 Ia=10mA, S=5,8mA/V, Ig2=3,8mA
Designed to amplify high-frequency voltage.
6J4P terminals:
1 first grid
2 third grid, screen
3 filament
4 filament
5 anode
6 second grid
7 cathode
6J4P parameters:
Film voltage 6.3V
Anode voltage 250V
Second grid voltage 150V
Film current 300±25mA
Anode current 11±3.3mA
Second grid current 4.5±1.7mA
Steepness 5.7±1.3mA/V
Current in the anode circuit at a second grid voltage of -7V 30μA
Resistance in the cathode circuit for automatic bias 68 ohms
Internal resistance about 900kOhm
Input capacitance 6.3pF
Output capacitance 6.3pF
Pass capacitance <0.0035pF
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