INDUSTRIAL
RF HEATING
RS 3020 CL
Forced-air cooled triode
20 kW
Output power:
20 kW in CW mode
Anode voltage: 12 kV
Anode dissipation: 10 kW max.
Frequency up to 120 MHz
INDUSTRIAL
RF HEATING
The RS 3020 CL is a RF power triode
designed specifically for industrial
applications. This tube uses a coaxial
design and metal-ceramic technology.
This triode is designed to operate
in CW mode. For operation in pulse
mode, the parameters depend on each
equipment characteristics, contact us
for specific information. The RS 3020 CL
is a forced-air cooled triode.
This product is designed, developed and
manufactured at an ISO 9001 production
site registered.
RS 3020 CL
Electrical characteristics
Filament
Filament voltage (+ 5 %, - 10 %)
Filament current
Surge current
Capacitance:
• grid-anode
• grid-cathode
• cathode-anode (1)
Amplification factor
Transconductance (Va: 3 kV, Ia: 2 A)
thoriated tungsten
5.7
135
405
21
52
1
22
36
V
A
A
max.
pF
pF
pF
mA/V
approx.
approx.
kg
approx.
Mechanical Characteristics
Operating position
Weight
Dimensions
vertical, anode up or down
5.6
see outline drawing
Maximum ratings
Frequency
Anode voltage:
• up to 40 MHz
• from 40 to 80 MHz
• from 80 to 120 MHz
Control-grid voltage
Control-grid current (F < 40 MHz):
• at full load, CW
• at no load, CW
Peak cathode current, CW
Anode dissipation
Grid dissipation:
• up to 40 MHz
• from 40 to 80 MHz
• from 80 to 120 MHz
Grid resistance (at blocked tube)
(1) Measured with a 30 cm diameter shielding plate in the grid terminal plane.
120
MHz
12
11
9
- 1.3
kV
kV
kV
kV
0.9
1.1
25
10
A
A
A
kW
300
230
180
15
W
W
W
kΩ
RS 3020 CL
Cooling
Anode cooling
Cooling water flow and pressure gradient
Inlet air temperature
Temperature at any point on tube envelope
forced air
see cooling curves
25
220
°C
°C
typ.
max.
Typical operation (2)
Class C RF oscillator for industrial applications
1
2
< 40
< 80
MHz
10
8
kV
- 900
- 750
V
1 180
1 025
V
2.5
2.4
A
620
650
mA
25
19
kW
20
15
kW
4.3
3.3
kW
150
155
W
1.45
1.15
kΩ
13.1
14.2
%
80
78
%
Examples
Frequency
Anode voltage
Control grid bias
RF control grid voltage
Anode current
Control grid current
Anode input power
Anode output power (3)
Anode dissipation
Control grid dissipation
Grid resistance
Feedback ratio
Oscillator efficiency
(2) Operation with higher frequencies on request.
(3) Without taking circuit losses into account.
Nota: Data sheets are for information only. For design purpose, please ask for our latest specification.
Cooling air curves (air flow from anode side)
Pa : anode dissipation
∆p : pressure drop
q : air flow rate
140
14
120
12
t1 = 25° C
14
12
q
10
80
8
60
10
8
Tout
6
6
40
4
20
2
0
0
4
⌬p
2
0
0
2
4
6
Pa (kW)
8
10
⌬p (mbar)
100
q (l/min)
Tout (°C)
Tout : air outlet temperature
RS 3020 CL
Constant current characteristics
Outline drawing (mm)
Vg1
Ø 98
Ø 25.8
2A
Filament
Filament- cathode
1A
0.5A
100
Grid
0
13
9A
- 100
6A
- 200
Anode
80
4A
- 300
30
2A
- 400
1A
0.5A
- 500
0.1A
- 600
- 700
Ø 159
0A
0
2
Ia (A)
4
Ig1 (A)
6
8
10
12
Va (kV)
This document cannot be considered to be a contractual specification. The information given herein may be modified without notice due to
product improvement or further development. Consult Thales Electron Devices before making use of this information for equipment design.
For further information, please contact:
THALES ELECTRON DEVICES
2 bis, rue Latécoère - 78941 Vélizy Cedex - France
Tel: + 33 1 30 70 35 00 - Fax: + 33 1 30 70 35 35
www.thalesgroup.com/electrondevices
P.507/ 2004.03 - Photos : Thales Electron Devices
- 800
2
62.5
15A
0A
12A
110.5
200
Ø 78
91.5
300
6A
5A
4A
3A
9
8A