Power - Triode (over 1000V 100W) ·Triode
Directly heated Philips power triode intended particularly for industrial RF-generator service. Rated for approximately 500 W plate dissipation and 4 kV plate voltage, with low-medium gain favoring substantial oscillator and generator applications.
TB41500 is a Philips industrial RF-generator triode. The supplied datasheet provides direct-filament data, RF/AF ratings, capacitances and high-power operating conditions.
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
Published filament, capacitance, typical characteristics, limiting values and RF/AF operating tables reviewed.
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.
Filament voltage
5 V
DirectlyHeated
Filament current
32.5 A
DirectlyHeated
Amplification factor
21
Published
Transconductance
3300 µS
Published
Maximum plate voltage
4000 V
Published limit
Plate capacitance
0.2 pF
Published
Grid capacitance
9.2 pF
Published
Grid-to-plate capacitance
5.1 pF
Published
Data set 02
Published operating points and test conditions from this source.
Oscillator output power (Wo~Wseedn), typical Wose 1.58 kW
1.58 s
Oscillator output power (Wo~Wseedn), typical Wose 1.58 kW
Frequency for full ratings f max. 50 MH
50 a
Frequency for full ratings f max. 50 MH
Oscillator output power (Wo_wfeedb) Wose 1.55 1.58 1.55 kW
1.55 s
Oscillator output power (Wo_wfeedb) Wose 1.55 1.58 1.55 kW
Anode output power W, 1640 1670 1650 W
1650 A
Anode output power W, 1640 1670 1650 W
Anode efficiency Ma 78 78 77 9%
9 A
Anode efficiency Ma 78 78 77 9%
Oscillator efficiency Mosc 74 73.5 72.5 %
72.5 s
Oscillator efficiency Mosc 74 73.5 72.5 %
Anode current I max. 560 mA
560 A
Anode current I max. 560 mA
Anode input power Wia max. 2.5 kW
2.5 A
Anode input power Wia max. 2.5 kW
Anode dissipation Wy max. 500
500 A
Anode dissipation Wy max. 500
Grid voltage ~Vg max. 1250
1250 v
Grid voltage ~Vg max. 1250
Grid current, on load Ig max. 210 mA
210 a
Grid current, on load Ig max. 210 mA
Grid dissipation Wg max. 100
100 s
Grid dissipation Wg max. 100
Grid circuit resistance Rg max. 15 k&
15 s
Grid circuit resistance Rg max. 15 k&
Cathode current, mean Iy max. 850 mA
850 a
Cathode current, mean Iy max. 850 mA
Envelope temperature Tenv max. 350 oC
350 v
Envelope temperature Tenv max. 350 oC
Seal temperature t max. 220 oc
220 S
Seal temperature t max. 220 oc
Oscillator output power (W, ~Weooq) Wosc 3.05 2.28 kW
2.28 s
Oscillator output power (W, ~Weooq) Wosc 3.05 2.28 kW
Anode output power W, 3200 2400 W
2400 A
Anode output power W, 3200 2400 W
Anode efficiency N 76 7% %
7 A
Anode efficiency N 76 7% %
Oscillator efficiency Tosc 72.5 72.5 G
72.5 s
Oscillator efficiency Tosc 72.5 72.5 G
Anode voltage vV, max. 7 kv
7 A
Anode voltage vV, max. 7 kv
Anode current I max. 750 mA
750 A
Anode current I max. 750 mA
Anode input power W, max. 5 kW
5 A
Anode input power W, max. 5 kW
Anode dissipation A max. See Fig. 2
2 A
Anode dissipation A max. See Fig. 2
Grid voltage —Vg max. 1250 V
1250 v
Grid voltage —Vg max. 1250 V
Grid current, on load Ig max. 185 mA
185 a
Grid current, on load Ig max. 185 mA
Grid dissipation ‘gg max. 100 W
100 s
Grid dissipation ‘gg max. 100 W
Grid circuit resistance Rg max. 15 kQ@
15 s
Grid circuit resistance Rg max. 15 kQ@
Cathode current, mean I max. 1.1 A
1.1 a
Cathode current, mean I max. 1.1 A
Envelope temperature Tenv max. 330 °C
330 v
Envelope temperature Tenv max. 330 °C
Seal temperature t max. 220 °cC
220 S
Seal temperature t max. 220 °cC
Oscillator output power (W,~Wfeedb) 1.525
1.525 s
Oscillator output power (W,~Wfeedb) 1.525
Anode output power Wi 1635 1600
1600 A
Anode output power Wi 1635 1600
Anode efficiency N4 77 76
76 A
Anode efficiency N4 77 76
Oscillator efficiency Mosc 74 73
73 s
Oscillator efficiency Mosc 74 73
Oscillator output power (Wo-Wreedh) Wose 990
990 s
Oscillator output power (Wo-Wreedh) Wose 990
Frequency f 50 50 50 MHz
50 MHz
Frequency f 50 50 50 MHz
Anode vootage Va 6 5 4 kv
4 A
Anode vootage Va 6 5 4 kv
Anode current Iy 350 430 535 mA
535 A
Anode current Iy 350 430 535 mA
Anode input power Wia 2100 2150 2140 W
2140 A
Anode input power Wia 2100 2150 2140 W
Anode dissipation W, 460 480 490 W
490 A
Anode dissipation W, 460 480 490 W
Grid resistor Rg 4.2 3.5 2.7 kQ
2.7 s
Grid resistor Rg 4.2 3.5 2.7 kQ
Grid current, on load Ig 120 130 150 mA
150 a
Grid current, on load Ig 120 130 150 mA
Grid voltage, negative -Vg 500 456 405 V
405 v
Grid voltage, negative -Vg 500 456 405 V
Grid dissipation Wg 23 29 41 W
41 s
Grid dissipation Wg 23 29 41 W
Grid resistor dissipation Wrg 60 59 61 W
61 s
Grid resistor dissipation Wrg 60 59 61 W
Frequency for full ratings f up to 50 MHz
50 a
Frequency for full ratings f up to 50 MHz
RF power triode TB4 /l 500
500 w
RF power triode TB4 /l 500
Frequency f S0 50 MHz
50 S
Frequency f S0 50 MHz
Anode voltage Vi 6 6 kV
6 A
Anode voltage Vi 6 6 kV
Anode current I 700 630 mA
630 A
Anode current I 700 630 mA
Anode input power W, 4200 3150 W
3150 A
Anode input power W, 4200 3150 W
Anode dissipation W, 1000 7350 W
7350 A
Anode dissipation W, 1000 7350 W
Grid resistor Rg 3.3 2.7 k@
2.7 s
Grid resistor Rg 3.3 2.7 k@
Grid current, on load I 170 160 mA
160 a
Grid current, on load I 170 160 mA
Grid voltage, negative Vg 560 432V
432 v
Grid voltage, negative Vg 560 432V
Grid dissipation Wg 55 48 W
48 s
Grid dissipation Wg 55 48 W
Grid resistor dissipation WRg 95 69 W
69 s
Grid resistor dissipation WRg 95 69 W
Anode voltage a . 4.5
4.5 A
Anode voltage a . 4.5
Anode current I, 320 380
380 A
Anode current I, 320 380
Anode input power Wia 2125 2100
2100 A
Anode input power Wia 2125 2100
Anode dissipation w 490 500
500 A
Anode dissipation w 490 500
Grid resistor Rg 4.2 3.5
3.5 s
Grid resistor Rg 4.2 3.5
Grid current, on load Ig 11(2) 120
120 a
Grid current, on load Ig 11(2) 120
Grid voltage, negative 420
420 v
Grid voltage, negative 420
Grid dissipation 25
25 s
Grid dissipation 25
Grid resistor dissipation WRg 50 50
50 s
Grid resistor dissipation WRg 50 50
RF power triode TB4 /1500
1500 w
RF power triode TB4 /1500
Frequency f 50 MHz
50 MHz
Frequency f 50 MHz
Transformer voltage, RMS Vir 4.5 kV
4.5 a
Transformer voltage, RMS Vir 4.5 kV