CS363

AX3150CJ ETC2 | Alldatasheet

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The AX3150CJ is a high power metal ceramic triode, intended for use in HF industrial generators for frequencies up to 100 MHz and output power up to 240 kW. Cooling is accomplished by water. GENERAL DATA Electrical Filament: Thoriated tungstenum direct heating Voltage (see note 1) Vf 15 V Current If 255 A Characteristics Amplification Factor p 22 atVa= 14 to 12kV;la=8A Transconductance at Va= 12 kV; a = 6 to 8 A S 95 mA/V Direct interelectrode capacitances Grid-Anode 66 pF Grid-Cathode 170 pF Anode-Cathode 4,5 pF Mechanical Overall dimensions Length 491 mm Diameter 220 mm See mechanical outline drawing Approximative weight 20 kg Mounting position .Vertical, with anode up or down ' (see cooling characteristics) Cooling type Water COVIMAG Z.I. La Marquisie Marcia 23, 2004 Avenue du 4 juillet 1776 "

19101 BRIVE Cedex

Internal cathode terminal Ref. 8311 219 25801 External cathode terminal Ref. 8311 219 26001 Cathode connecting strip (2 per tube) Ref. 8311 219 25201 Grid terminal for f< 10 MHz Ref. 8311 219 19401 Grid terminal for f> 10 MHz Ref. 8311 219 25601 Handle Ref. 8311 219 26201 Water connector (2 per tube) Ref. 8311 219 26801 Cooling To obtain optimum life, the seal/envelope temperature under normal operating conditions should be kept below 220 °C at any point. Additional cooling by an air flow rate of approximately 3 m3/min, channeled on the tube terminal side is therefore required. The cooling water diagram applies to water inlet temperature tl = 35 °C (100 kPa = 1 atm = 1 bar). If the tube is mounted in normal position (anode down), water in the anode cooling jacket has to flow in the arrow-marked direction. If the tube is mounted in reverse position (anode up), input and output water connections should be reversed. Note 1 The cathodes consist of thoriated tungsten and are directly heated. No RF voltage is permitted between the two heater terminals of the tube since this would result in an additional heating of the cathode. For this reason, a capacitive bridging of the cathode is generally required. To reduce resonance effects, a low-ohmic resistor should be provided at the heater terminals. Heater voltage The heating power is primarily determined by the heater voltage applied to the cathode. The rated heater voltage is the maximum voltage required by a new tube to supply its rated output power. I COVIMAG Z.I. La Marquisie March 23, 2001 Avenue du 4 juillet 1776

During operation, the heater voltage value should be kept as precisely as possible; the utmost average deviation from the rated value may only amount to +1 % or -3%. Temporary deviations between +5 and -10% are permitted. Since higher voltage variations may occur in industrial power systems, stabilization of the heater voltage will usually be necessary. The heater voltage should be set by means of an rms voltmeter, such as a moving iron meter of 0.5% accuracy, with the measurements being directly carried out at the cathode terminals. An inaccurately set heater voltage has - due to physical principles - the following effects : on the one hand, the cathode service life is shortened by overheating, while underheating, on the other hand, reduces the emission capability and thereby the possible peak cathode current, thus causing a power decrease. Heater current The heater current of a new tube may deviate from the rated value within a set tolerance range. During service life decarburization of the cathode thoriated tungsten filaments causes an increasing heater current which may exceed the initial value by up to 15 %. This has to be considered when dimensioning the heater transformer. OSCILLATOR FOR INDUSTRIAL APPLICATION (Anode voltage from three-phase bridge rectifier) Maximum ratings Frequency f 30 MHz DC anode voltage Va 15 kV DC grid voltage Vg - 2 kV DC cathode current Ik 30 A Peak cathode current Ikp 140 A DC grid current Ig 4 A No load DC grid current Ignl 5 A Anode dissipation Wa 100 kW Grid dissipation Wg 2 kW Grid resistor at blocked tube Rgc 5 kQ COVIMAG Z.I. La Marquisie March 23, 2001 Avenue du 4 juillet 1776

Frequency f <30 < 30 <30 <30 <30 MHz Output power (see note 2) Wosc 240 210 190 140 100 kW DC anode voltage Va 14 13 12 10 8 kV DC grid voltage Vg - 850 -800 - 750 - 700 - 630 V Peak RF grid voltage Vgp 1310 1250 1200 1130 1050 V Feedback factor Vgp/Vap 10.5 10.7 11 12.3 14.2 % Grid resistor Rg 275 260 225 205 175 Q Anode input power Wia 312 272 244 177 126 kW Anode dissipation Wa 68 58 50 33 23 kW Oscillator efficiency nosc 77 77 78 79 79 % Anode load resistor Ra 325 325 310 300 275 Q Note 2: Not considering circuit losses COVIMAG Z.I. La Marquisie March 23, 2001 Avenue du 4 juillet 1776

°C kPa Q t2 AP L/mn tl =35°C 70 - 140 - 60 / -- … 40 - 80 40 - 0 10 20 30 40 50 60 70 80 90 1 00 kW W - - Table I - Cooling water diagram COVIMAG Z.I. La Marquisie March 23, 2001 Avenue du 4 juillet 1776 Tel (33) 555.86.49.50 -Page-- 010 2030 4050607080 90 /0kW Table 1 - Cooling water diagram Page - 5

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AX3150C Internal Cathode Terminal AX3151C External Cathode Terminal AX360G Grid Terminal for freq. <10 MHz AX361G Grid Terminal for freq. >10 MHz CS363 CATHODE CONNECTING STRIP(2 per tube) AXEEL2 Antielectrolytic coupling for 1 1/4" hose (2 per tube) AXEEL6 Antielectrolytic coupling for 1" hose (2 per tube) AXEEL8 Antielectrolytic coupling for 3/4" hose (2 per tube)