300B-L 300BL HiFi Audio Tube Amplifier DIY(4pcs Matched Quad)

Preamps
It is a direct-heated cathode medium-power triode for class A1 amplification. In audio amplifiers, it is suitable for 10W output power.
Extreme Rating
Anode voltage: 480V
Anode dissipation power............ 40W
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
60 mA
On-resistance 5.5 mA/V
Ri0.7 K
Three point eighty five
Output power 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
Channels: 1
Model: UK 300BL
Maximum power per channel: No power supply