Data set 01
1972 Thomson CSF
Published operating points and test conditions from this source.
Tetrode
Other
power amplifier operating up to
300 MHz
power amplifier operating up to 300 MHz.
vapotroncooled anode of the TH
561
vapotroncooled anode of the TH 561 can dissipate
Filamentvoltage ( [1]
2 V
Filamentvoltage (2). . . . .. ... ... .. . .. .. 7.0V2%
Filamentvoltage ( [2]
7 V
Filamentvoltage (2). . . . .. ... ... .. . .. .. 7.0V2%
Fitamentcurrent
140 A
Fitamentcurrent. . . . . .. .. . . .. .. 140 A
Maximum surge Current
450 A
Maximum surge Current . . .. .. . ... ... 450 A
cathode - control grid {g1) . ... ... .. ... ... . .. .. .. ... ...,
83
- cathode - control grid {g1) . ... ... .. ... ... . .. .. .. ... ..., 83 pF
cathode - screen grid ( [1]
92
- cathode - screen grid (92) . . . ... ... . 5.3 pF
cathode - screen grid ( [2]
5.3
- cathode - screen grid (92) . . . ... ... . 5.3 pF
cathode -anode
0.12
- cathode -anode . . . ... ... 0.12 pF
gl -anode L
0.8
gl -anode L. 0.8 pF
Transconductance (I, = [1]
2
Transconductance (I, = 2A) ......... ... .. .. ... 60 mA/V
Transconductance (I, = [2]
60
Transconductance (I, = 2A) ......... ... .. .. ... 60 mA/V
Maximum anode dissipation
20 kW
Maximum anode dissipation .. ... ... . ... ... ... 20 kW
Maximum temperature of inlet water
50
Maximum temperature of inlet water ... ... ..... ... ... ... ... ........ 50 °c
Maximum temperature of outlet water
90
Maximum temperature of outlet water . .. ... ... .. .. ... ... ... . .... 90 °c
( [1]
1 V
(1) For applying the different voltages, see the instructions given on page 3.
( [2]
3 V
(1) For applying the different voltages, see the instructions given on page 3.
(
2
(2) In high-frequency operation, the cathode is submitted to a considerable back bombardment, which raises its temperature.
Maximum pressure allowed at the water-jacket input
4
Maximum pressure allowed at the water-jacket input . ...................... 4 bar
Maximum temperature at any point of the ceramics ( [1]
3
Maximum temperature at any point of the ceramics (3} .. ................... 250 °C
Maximum temperature at any point of the ceramics ( [2]
250
Maximum temperature at any point of the ceramics (3} .. ................... 250 °C
Control-grid bias voltage . ... ... ... . e
-200 V
Control-grid bias voltage . ... ... ... . e -200 Vdc
Anode dissipation . .. ... e
20 kW
Anode dissipation . .. ... e 20 kW
Screen-grid dissipation . . ... ... e
150 W
Screen-grid dissipation . . ... ... e 150 w
Control-grid dissipation .. .. .. ... ... e
50 W
Control-grid dissipation .. .. .. ... ... e 50 W
Frequency [1]
260 MHz
Frequency . .. ... 260 260 MHz
Frequency [2]
260 MHz
Frequency . .. ... 260 260 MHz
Anode voltage . ... e e e e e [1]
5800 V
Anode voltage . ... e e e e e 5800 6200 Vdc
Anode voltage . ... e e e e e [2]
6200 V
Anode voltage . ... e e e e e 5800 6200 Vdc
Screen-grid voltage [1]
500 V
Screen-grid voltage . . ... .. .. .. ... 500 500 Vdc
Screen-grid voltage [2]
500 V
Screen-grid voltage . . ... .. .. .. ... 500 500 Vdc
Control-grid bias voltage {( [1]
4 V
Control-grid bias voltage {(4) . ... .... .. ... ... ... . .. ... . . .. . ... -85 -85 Vdc
Control-grid bias voltage {( [2]
-85 V
Control-grid bias voltage {(4) . ... .... .. ... ... ... . .. ... . . .. . ... -85 -85 Vdc
Control-grid bias voltage {( [3]
-85 V
Control-grid bias voltage {(4) . ... .... .. ... ... ... . .. ... . . .. . ... -85 -85 Vdc
Peak RF control-grid voltage ... ... ... ... . ... .. . ..., [1]
105 V
Peak RF control-grid voltage ... ... ... ... . ... .. . ..., 105 115 \
Peak RF control-grid voltage ... ... ... ... . ... .. . ..., [2]
115 V
Peak RF control-grid voltage ... ... ... ... . ... .. . ..., 105 115 \
Zero-signal anode current . ... L. L e e [1]
700 mA
Zero-signal anode current . ... L. L e e 0.7 0.75 A
Zero-signal anode current . ... L. L e e [2]
750 mA
Zero-signal anode current . ... L. L e e 0.7 0.75 A
Anode direct current . . . .. e e e [1]
3.5 A
Anode direct current . . . .. e e e 3.5 3.9 A
Anode direct current . . . .. e e e [2]
3.9 A
Anode direct current . . . .. e e e 3.5 3.9 A
Screen-grid direct current . .. . ... L L [1]
75 A
Screen-grid direct current . .. . ... L L 75 100 mA
Screen-grid direct current . .. . ... L L [2]
100 A
Screen-grid direct current . .. . ... L L 75 100 mA
Drivingpower [1]
250 W
Drivingpower . . . . ... 250 300 w
Drivingpower [2]
300 W
Drivingpower . . . . ... 250 300 w
Output power intheload . ... .. .... ... ... . . ... ... it eiiii [1]
12.5 kW
Output power intheload . ... .. .... ... ... . . ... ... it eiiii... 12.5 15 kW
Output power intheload . ... .. .... ... ... . . ... ... it eiiii [2]
15 kW
Output power intheload . ... .. .... ... ... . . ... ... it eiiii... 12.5 15 kW
Screen-grid voltage . .. . ... e
800 V
Screen-grid voltage . .. . ... e 800 Vde
Control-grid bias voltage . ................. e e e e e
-200 V
Control-grid bias voltage . ................. e e e e e —200 Vdc
Peak cathode current
40 A
Peak cathode current . .. ... .. . ... . 40 A
Average cathode current . .. ... ... ... e
6 A
Average cathode current . .. ... ... ... e 6 A
Anode dissipation
20 kW
Anode dissipation . . ... ... 20 kW
different electrode voltages and maintained for at least
3 V
different electrode voltages and maintained for at least 3 minutes after the filament voltage has been switched off.
(
4 A
(4) Adjusted m order to obtain the mentioned anode current with no drive signal.
Control-grid dissipation
100 W
Control-grid dissipation . ... .. .. . . . 100 W
Frequency .. .. e e e e
120 MHz
Frequency .. .. e e e e 120 MHz
Anode voltage [1]
7 V
Anode voltage. . . .. .. .. 7 7.5 kVdc
Anode voltage [2]
7.5 V
Anode voltage. . . .. .. .. 7 7.5 kVdc
Screen-grid voltage. . . . . . . ... ... e [1]
500 V
Screen-grid voltage. . . . . . . ... ... e 500 500 Vde
Screen-grid voltage. . . . . . . ... ... e [2]
500 V
Screen-grid voltage. . . . . . . ... ... e 500 500 Vde
Control-grid bias voltage (B) [1]
-110 V
Control-grid bias voltage (B) .. ... ... ... . .. ... . . .. ... -110 -110 Vde
Control-grid bias voltage (B) [2]
-110 V
Control-grid bias voltage (B) .. ... ... ... . .. ... . . .. ... -110 -110 Vde
Anode current at zero drive. . . . . . . .. ... e [1]
250 mA
Anode current at zero drive. . . . . . . .. ... e 0.25 0.25 A
Anode current at zero drive. . . . . . . .. ... e [2]
250 mA
Anode current at zero drive. . . . . . . .. ... e 0.25 0.25 A
Anode direCt CUIrent . . . . . . . . . L e e e e [1]
2
Anode direCt CUIrent . . . . . . . . . L e e e e 2 2.3 A
Anode direCt CUIrent . . . . . . . . . L e e e e [2]
2.3
Anode direCt CUIrent . . . . . . . . . L e e e e 2 2.3 A
Screen-grid directcurrent . . . . . . ... e [1]
70 A
Screen-grid directcurrent . . . . . . ... e 70 100 mA
Screen-grid directcurrent . . . . . . ... e [2]
100 A
Screen-grid directcurrent . . . . . . ... e 70 100 mA
Control-grid direct current [1]
5 A
Control-grid direct current . . . . .. ... . .. . 5 10 mA
Control-grid direct current [2]
10 A
Control-grid direct current . . . . .. ... . .. . 5 10 mA
Drivingpower (B8) . ... . ... . . e e e [1]
25 W
Drivingpower (B8) . ... . ... . . e e e 25 30 W
Drivingpower (B8) . ... . ... . . e e e [2]
30 W
Drivingpower (B8) . ... . ... . . e e e 25 30 W
Load OUtpUt POWEr . . . . . .. . . e e e e e [1]
10 kW
Load OUtpUt POWEr . . . . . .. . . e e e e e 10 12 kW
Load OUtpUt POWEr . . . . . .. . . e e e e e [2]
12 kW
Load OUtpUt POWEr . . . . . .. . . e e e e e 10 12 kW
A - Recommended solution : a filament-preheating voltage of
1.5 V
A - Recommended solution : a filament-preheating voltage of 1.5 V is continuously applied to the tube
The nominal filament voltage for
5 V
The nominal filament voltage for 5 seconds
One-half the nominal filament voltage {Vf) for
60 V
One-half the nominal filament voltage {Vf) for 60 seconds
The nominal filament voltage {Vf) for
60 V
The nominal filament voltage {Vf) for 60 seconds
Published value
1 A
1 - Overcurrents Due to Incorrect Use Conditions
respectively. These relays are to be adjusted to operate when a current equal to
1.5 A
respectively. These relays are to be adjusted to operate when a current equal to 1.5 Imax is reached, Imax
Published value
2 A
2 - Overcurrents Due to Stray Oscillations or Interelectrode Arcing
control-grid, screen-grid and anode circuits) which act for a current equal to
5 A
control-grid, screen-grid and anode circuits) which act for a current equal to 5 Imax, Imax being the
grid bias voltage, with a total delay of less than
30 V
grid bias voltage, with a total delay of less than 30 microseconds.
{
5 A
{5} Adjusted in order to obtain the mentioned anode current with no drive signal.