845 type vavle is directly heated glass shell structure type thorium tungsten carbide natural cooling cathode triode.the anode maximum disspation power is 100W.
Carton dimensions: 59*59*47cm/4pcs
Audio frequency power amplifier , Modulator
General Characteristics
Filament Voltage 10
Filament Current (amps) 3.25
Amplification Factor 5.3
Grid to Plate Transconductance@ 100 ma. ( micromhos) 3400
Direct Interelectrode Capacitances:
Grid to Plate 11.5
Grid to Filament 5
Plate to Filamen 3.5
MAXIMUM RATING AND TYPICAL OPERATING CONDITIONS
A.F. Power Amplifier and Modulator--- Class A ( typical operation One tube)
A.C. Filament Voltage 10
D.C.Plate Voltage 1000
D.C.Grid Voltage -155
Peak A.F. Grid Voltage 150
D.C Plate Current ( ma.) 65
Plate Dissipation ( watts) 65
Load Resistance( ohms) 9000
Power output ( watts) 21
Distortion ( % Sencond Harmaonic) 5
A.F. Power Amplifier and Modulator--- Class AB( typical operation Two tubes)
A.C. Filament Voltage 10 10
D.C.Plate Voltage 1000 1250
D.C.Grid Voltage(Approx) -175 -225
Load Resistance ( hhms per tube) 1150 2200
Effective Load Resistance ( plate to plate) (ohms) 4600 8800
Zero Signal Plate Current( ma.) 40 40
Peak A.F. Grid to Grid Voltage( Approx.) 340 440
Max. Signal D.C. Plate Current( ma.) 220 200
Max. Signal Plate Input ( watts) 220 250
Max. Signal Power output ( watts) 75 105
For delivery time:
Generally, we will dispatch the items within 7 days upon order confirmation; some items may need 15~21 days to get ready for delivery, then we will try our best to dispatch as soon as possible, or we will contact you and offer advice.
For Bulk order:
If you would like to place a bulk order, please contact us for better price and better delivery cost.
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