Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower
Directly heated 125-watt transmitting tetrode for push-pull audio and Class-C RF power-amplifier or oscillator operation.
Directly heated 125 W transmitting tetrode for AF push-pull and RF class-C power-amplifier or oscillator operation.
Giant 5-contact all-glass base
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Promoted ratings taken from printed Maximum Ratings blocks; source filename/content mismatch handled by printed designation.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Control-grid input capacitance maximum
12.7 pF
Published interelectrode capacitance
Plate output capacitance maximum
4.2 pF
Published interelectrode capacitance
Plate-to-control-grid capacitance maximum
0.1 pF
Published interelectrode capacitance
Data set 02
Published operating points and test conditions from this source.
Heater voltage
5 V
Heater current
6.6 A
Maximum plate voltage
3000 V
Maximum screen-grid voltage
600 V
Maximum plate dissipation
125 W
Maximum screen-grid dissipation
20 W
Maximum control-grid dissipation
5 W
Maximum frequency
235 MHz
Plate voltage
1500 V
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Plate voltage
2000 V
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Plate voltage
2500 V
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Screen voltage
600 V
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Screen voltage
600 V
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Screen voltage
600 V
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Control-grid bias
-90 V
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Control-grid bias
-94 V
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Control-grid bias
-96 V
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Zero-signal plate current
60 mA
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Zero-signal plate current
50 mA
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Zero-signal plate current
50 mA
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Maximum-signal plate current
222 mA
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Maximum-signal plate current
240 mA
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Maximum-signal plate current
232 mA
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Screen current
17 mA
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Screen current
6.4 mA
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Screen current
8.5 mA
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Plate-to-plate load resistance
10 kohm
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Plate-to-plate load resistance
13.4 kohm
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Plate-to-plate load resistance
20.3 kohm
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Grid drive voltage
64.3 V
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Grid drive voltage
67 V
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Grid drive voltage
68.5 V
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Plate dissipation
87.5 W
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Plate dissipation
125 W
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Plate dissipation
125 W
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Power output
158 W
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Power output
230 W
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Power output
330 W
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Distortion
5 %
ClassAB1; PushPull; TwoTubes; Ua=1500 V
Distortion
2 %
ClassAB1; PushPull; TwoTubes; Ua=2000 V
Distortion
2.6 %
ClassAB1; PushPull; TwoTubes; Ua=2500 V
Plate voltage
1500 V
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Plate voltage
2000 V
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Plate voltage
2500 V
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Plate voltage
3000 V
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Screen voltage
350 V
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Screen voltage
350 V
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Screen voltage
350 V
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Screen voltage
350 V
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Control-grid bias
-41 V
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Control-grid bias
-45 V
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Control-grid bias
-43 V
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Control-grid bias
-51 V
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Zero-signal plate current
87 mA
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Zero-signal plate current
72 mA
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Zero-signal plate current
93 mA
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Zero-signal plate current
55 mA
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Maximum-signal plate current
400 mA
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Maximum-signal plate current
300 mA
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Maximum-signal plate current
260 mA
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Maximum-signal plate current
260 mA
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Screen current
34 mA
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Screen current
5 mA
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Screen current
6 mA
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Screen current
3.5 mA
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Plate-to-plate load resistance
7.2 kohm
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Plate-to-plate load resistance
13.6 kohm
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Plate-to-plate load resistance
22.2 kohm
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Plate-to-plate load resistance
27.7 kohm
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Grid drive voltage
100 V
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Grid drive voltage
75 V
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Grid drive voltage
63.5 V
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Grid drive voltage
70.8 V
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Plate dissipation
125 W
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Plate dissipation
125 W
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Plate dissipation
125 W
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Plate dissipation
125 W
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Power output
350 W
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Power output
350 W
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Power output
400 W
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Power output
520 W
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Distortion
2.5 %
ClassAB2; PushPull; TwoTubes; Ua=1500 V
Distortion
1 %
ClassAB2; PushPull; TwoTubes; Ua=2000 V
Distortion
2.2 %
ClassAB2; PushPull; TwoTubes; Ua=2500 V
Distortion
1.8 %
ClassAB2; PushPull; TwoTubes; Ua=3000 V
Plate voltage
2000 V
ClassC; OneTube; TelegraphyOrFMTelephony; f<=120 MHz; Ua=2000 V
Plate voltage
2500 V
ClassC; OneTube; TelegraphyOrFMTelephony; f<=120 MHz; Ua=2500 V
Plate voltage
3000 V
ClassC; OneTube; TelegraphyOrFMTelephony; f<=120 MHz; Ua=3000 V
Control-grid to cathode capacitance
12.7 pF
Upper limit
Anode capacitance
4.2 pF
Upper limit
Anode to control-grid capacitance
0.1 pF
Upper limit
Transconductance
2200 uS
Minimum; Ia=50 mA
Plate voltage
1250 V
Screen voltage
350 V
Control-grid voltage
-24 V
Plate current
100 mA
Screen current
8 mA