Preamps
300BL
This product is a direct-heated cathode medium-power triode, suitable for class A1 amplification. In audio amplifiers, it is suitable for 10W output power.

Anode voltage: 480V
Anode dissipated power... ...
Cathode current
Self bias ................................. 100 mA
Fixed bias voltage 70 mA
Interelectrode capacitance
Input capacitance ................................. 9pF
Output capacitance................................4.3PF
Inter-circuit capacitance.................................15PF
Static parameters
Ua300V
-Ug 60V
Current 60 mA
Voltage range 5.5 mA/V
Ri0.7 K
Three point eighty five
Water output 6.6W
Recommended parameters
Ugg
Ua Uf (AC) Uf (DC) I a
Voltage --~ Voltage----Voltage---- mA
200--33--29.5--77
200--45--41.5--20
250--46--42.6 --74
250--57--53.6 --22
300--60--56.5--68
300--70--66.5--23
400--86--82.5 --68
400--98--94.5 --19
Limit Parameters
450--100--96.5--60