Preamps
300B series direct-heated cathode medium power transistors are used for class A1 amplification. They are suitable for audio amplifiers where the output power requirement is below 10W.
Final Rating
Anode voltage: 480V
Anode dissipation power......40W
Cathode current
Self-bias voltage 100 mA
Fixed bias voltage 70 mA
Interelectrode capacitance
Input capacitance: 9PF
Output capacitance: 4.3PF
Cross-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
----------------Well
---------Ua Uf (AC) Uf (DC) Ia
----------V --~V----=V----mA
Recommended parameters - 33-29.5-77
---------200{45--41.5--20
---------------46--42.6--74
---------250 { 57 --53.6 --22
---------------60--56.5--68
---------300 { 70--66.5--23
---------------86--82.5--68
---------400 { 98--94.5--19
Limit parameters -450 100-96.5-60