This specification specifies the detailed requirements for FU251F transmitting tubes. This specification applies to FU251F transmitting tubes. FU251 transmitting tubes are mainly used for AB1 audio amplification and power input of single-sideband communication machines below 500MHz. They can also be used for amplification in other ultra-short wave radio equipment. SJ 20022-1992 Detailed Specifications for FU251F Transmitting Tubes SJ20022-1992 Standard Download Decompression Password: www.bzxz.net
This specification specifies the detailed requirements for FU251F transmitting tubes. This specification applies to FU251F transmitting tubes. FU251 transmitting tubes are mainly used for AB1 audio amplification and power input of single-sideband communication machines below 500MHz. They can also be used for amplification in other ultra-short wave radio equipment.
Some standard content:
1 Scope People's Republic of China Electronic Industry Military Standard Electronic Tube Detail specification for transmitting tube of type FU251F Detail specification for transmitting tube of type FU251F1.1 Subject content This specification specifies the detailed requirements for FU251F transmitting tube. 1.2 Scope of application This specification applies to FU251F transmitting tube. SJ20022—92 FU251F transmitting tube is mainly used for AB, class audio amplification and power amplification in single-sideband communication equipment below 500MHz, and can also be used for amplification in other ultra-short wave radio equipment. 1.3 Structural characteristics Structure: metal ceramic tetrode; Installation position: arbitrary; Cooling method: strong air cooling; Mass: maximum 150g. 1.4 Dimensions and electrode connections For dimensions, see Figure A1 in Appendix A (Supplement), and for electrode connections, see Figure A2. 1.5 Absolute ratings (AB, Class or C telegraph) Table 1 Hot wire voltage Anode DC voltage Control grid DC voltage Gate DC voltage AB, Class C telegraph Anode DC current Control grid power dissipation Curtain grid power dissipation Anode power dissipation Metal-ceramic sealing temperature Anode heat dissipation Temperature at the root of the sheet Cathode preheating time China Electronics Industry Corporation 1992-02-01 Release No. Minimum value Maximum value See d in 6.2 1992-02-01 Implementation 1.6 Test conditions (TC) Hot wire voltage Cathode preheating time Anode DC voltage Curtain grid DC voltage Control grid DC negative voltage Anode DC current Cooling air volume 1.7 Typical characteristics Internal amplifier Coefficient Transconductance (1,=200mA) Inter-electrode capacitance: Input capacitance Output capacitance Cross-circuit capacitance Constant current characteristic curve Reference documents GB/T3789-91 GB7274-87 GB11486--89 GJB616—88 GJB922--90 GJB921--90 3 Requirements 3.1 Detailed requirements SJ20022—9 2 Minimum value Minimum value See Appendix D (reference) Test method for transmitting tube electrical performance Test method for inter-electrode capacitance of electron tube Nominal value Nominal value Test method for current and voltage of filament or hot wire of electron tube Test method for electron tube General specification for electron tube General specification for electron tube packaging Maximum value Maximum value m'/min All requirements for FU251F transmitting tube shall comply with the provisions of this specification and GJB922 General Specification for Electron Tubes. 3.2 Marking Model: FU251F; Military mark: J Manufacture date and serial number; Manufacturer's trademark. Quality assurance provisions Quality consistency inspection Inspection or test Visual inspection Hot wire current Control gate DC voltage Window grid current Control grid reverse current Current distribution Pulse emission current term drop Part 1 4.2 Quality consistency inspection GB11486 SJ20022-92 Test conditions Non-working state GB/T3789.21 GB/T 3789.2 GB/T3789.4 Part 2 U-2000V Other TC Ugm100V U,-U-250V tw≥4500μs fep=11±1Hz 1,≤0.5% Ripple≤0.1% U regulation U.-U-250V t-≥4500 μs fe=11±1Hz Ripple≤0.1% Uk adjustment Inspection requirements Minimum value Maximum value Unit See Appendix B Inspection or test Interchangeable dimensions Inter-electrode capacitance Leakage between hot wire and cathode Controlled shed emission current Screen grid emission current Output power 4.3 Quality consistency inspection||tt| |Inspection or test Dimensions to be controlled GB7274 SJ20022—92 Test conditions Non-working state Non-working state GB/T3789. GB/T3789.5 GB/T3789.5 GB/T3789. Part 3 Uh=150V Un-150V| |tt||Igi=70mA Anode and screen grid potential suspended,=120s 1g2=80mA Anode potential suspended t=120s Class AB amplifier f=-30MHz U,=1500V -Ugl=65V U2=400V Air volume: 0.2m/min Test conditions||tt| |Non-working state Non-working state α=150m/s* -20~80 times/min Times: 1000 times GJB616.1013 Half sine wave Pulse width: 11±2ms Anode upward, vertical direction GJB616.1608wwW.bzxz.Net Non-working state Inspection requirements Minimum value Maximum value Unit See figure A1 Inspection requirements Minimum value Maximum value Unit See Figure A1 n=3C,=0 ng—3 Inspection or test Constant damp heat After collision, dynamic, constant damp heat test, respectively measure and control the gate reverse current Life test Output power Life test After test: Inter-electrode insulation SJ 20022--92 Continued Table 6 Test conditions a=-50m/s2 f=50Hz t=30nin Anode upward, vertical direction 1=40±2℃ Relative humidity (93±)% GB/T3789.4 OthersTC AB, Class Amplifier f-30NHzU1=-65V 1,-250mA.U,=1500V Ug2-400V Air volume=0.2m*/min AB, class amplifier GB/T3789.5 GB/T3789. Note: AQL—Qualified quality level; IL inspection level P cycle (month), n sample size; C—Qualified judgment number; D—Destructive items. 5 Delivery preparation f-30MHz.Ue=-65V I.-250mA.U.1500V U2=400V Air volume=0.2m/min Non-working state, measured with 500V megaohmmeter First grid connected to negative pole Second grid connected to positive pole Second grid connected to negative pole First grid connected to negative pole Inspection requirements Minimum value Maximum value Unit 12n3C,—1 n-3C,-0 n,-2Cf0 n=2|C,=1 5.1 Packaging 5.1.1 Packaging requirements S.I20022—92 The packaging should comply with the provisions of GJB921 "General Specification for Electronic Tube Packaging". a. Packing drawing number ××××××. Product certificate, factory inspection form. 5.1.2 Packaging Marking The packaging box marking shall comply with GB191 "Packaging Storage and Transportation Pictorial Marking". 5.1.3 Packaging Test Put the packaged launch tube on the transport vehicle and drive it for 200 km at a speed of 30 km/h on a Class 3 road, or conduct the test on an equivalent bumper. The launch tube should not have mechanical damage after transportation, and the parameters of the first part of the quality consistency test should comply with the provisions of the detailed specifications. The launch tube packaging test is carried out during product identification or structural changes, as well as changes in packaging structure and materials. The sampling plan is n=4, C=1. 5.2 Storage The launch tube should be stored in a dry, ventilated warehouse without the influence of corrosive gases, with an ambient temperature of -5 to +40℃ and a relative humidity of no more than 80%. 5.3 Transportation The packaged launch tube can be transported by any means. During transportation, it should avoid severe vibration, impact, mechanical shock, direct rain and corrosion. 6 Notes 6.1 Contents of ordering documents FU251F launch tube; Detailed specification number: Manufacturer code or name: Quantity. 6.2 Precautions for use When the launch tube is working, the anode and core column should be forced to cool. The cathode preheating time should be no less than 1min. When the launch tube is stored for more than half a year or the storage warehouse is relatively humid, the cathode preheating time should be no less than 30min. At different working frequencies, the voltage of the hot wire should be adjusted to the specified value: Color Frequency (MHz) 301~400 401~500 To prevent oxidation of the coating, avoid direct contact of the hands with the transmitting tube. f. The transmitting tube should be connected to the voltage in the following order and disconnected in the reverse order. Hot wire voltage Control grid bias —Anode voltage Curtain grid voltage Pulse voltage SJ20022-92 SJ20022-92 Appendix A FU251F transmitter tube appearance and pin connection diagram (supplement) Quality consistency inspection Minimum size Quality consistency inspection Minimum size FU251F transmitter tube appearance * 4, 6, 8 Tube cap, glue heater Tube base ring Part 2 Maximum size Part 3 Maximum size Screen grid Control grid Screen grid Figure A2FU251F type transmitting tube pin connection diagram SJ20022—92 Appendix B Visual inspection (Supplement) B1 The marking of the transmitting tube shall comply with the regulations, be clear and firm. B2 The welding seam of the transmitting tube shall be smooth and flat. The anode radiator of the transmitting tube shall be evenly distributed and neatly arranged, and no obvious distortion and deformation shall be allowed. B3 The coating of the transmitting tube shall be bright, and no acid marks shall be allowed to remain. B5 The ceramic surface of the transmitting tube shall be clean. Appendix C Current distribution test method (Supplement) C1 Definition C1.1 Current distribution Electronic tube current distribution refers to the current flowing through each anode loop when the anode current reaches the specified value under the specified working conditions. C1.2 Pulse emission current drop Electronic tube pulse emission current drop refers to the drop value of the pulse trailing edge of the cathode pulse emission current to the top of the leading edge under the specified working conditions. C2 Test principle diagram Drum test tube In the figure: P, P: a pulse voltmeter or oscilloscope 1R ZWD a DC regulated power supply, the voltage should be kept stable within the pulse duration; S a single-pole four-position switch; P a pulse signal generator; R,~R, non-inductive resistor. Additional Notes: 0.200..050 SJ20022-92 Appendix D Constant Current Characteristic Curve (Reference) Anode Voltage (V) Anode Current (A) Curtain Grid Current (A) Controlled Anode Current (A) FU251F Transmitter Constant Current Characteristic Curve This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. 0 (U350V) This standard is drafted by China Electronics Technology Standardization Institute and Yichang Electronic Tube Factory. The main drafters of this standard are Tong Jinlin, Zhang Zhongquan, Hu Shanqiong and Sun Lixin. Project code: B91034. The voltage of the transmitting tube should be connected in the following order and disconnected in the reverse order. Hot wire voltage Control grid bias —Anode voltage Screen grid voltage Pulse voltage SJ20022-92 SJ20022-92 Appendix A FU251F transmitting tube appearance and pin connection diagram (supplement) Quality consistency inspection Minimum size Quality consistency inspection Minimum size FU251F transmitting tube appearance * 4, 6, 8 Tube cap, glue heater Tube base ring Part 2 Maximum size Part 3 Maximum size Screen grid Control grid Screen grid Figure A2FU251F type transmitting tube pin connection diagram SJ20022—92 Appendix B Visual inspection (Supplement) B1 The marking of the transmitting tube shall comply with the regulations, be clear and firm. B2 The welding seam of the transmitting tube shall be smooth and flat. The anode radiator of the transmitting tube shall be evenly distributed and neatly arranged, and no obvious distortion and deformation shall be allowed. B3 The coating of the transmitting tube shall be bright, and no acid marks shall be allowed to remain. B5 The ceramic surface of the transmitting tube shall be clean. Appendix C Current distribution test method (Supplement) C1 Definition C1.1 Current distribution Electronic tube current distribution refers to the current flowing through each anode loop when the anode current reaches the specified value under the specified working conditions. C1.2 Pulse emission current drop Electronic tube pulse emission current drop refers to the drop value of the pulse trailing edge of the cathode pulse emission current to the top of the leading edge under the specified working conditions. C2 Test principle diagram Drum test tube In the figure: P, P: a pulse voltmeter or oscilloscope 1R ZWD a DC regulated power supply, the voltage should be kept stable within the pulse duration; S a single-pole four-position switch; P a pulse signal generator; R,~R, non-inductive resistor. Additional Notes: 0.200..050 SJ20022-92 Appendix D Constant Current Characteristic Curve (Reference) Anode Voltage (V) Anode Current (A) Curtain Grid Current (A) Controlled Anode Current (A) FU251F Transmitter Constant Current Characteristic Curve This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. 0 (U350V) This standard is drafted by China Electronics Technology Standardization Institute and Yichang Electronic Tube Factory. The main drafters of this standard are Tong Jinlin, Zhang Zhongquan, Hu Shanqiong and Sun Lixin. Project code: B91034. The voltage of the transmitting tube should be connected in the following order and disconnected in the reverse order. Hot wire voltage Control grid bias —Anode voltage Screen grid voltage Pulse voltage SJ20022-92 SJ20022-92 Appendix A FU251F transmitting tube appearance and pin connection diagram (supplement) Quality consistency inspection Minimum size Quality consistency inspection Minimum size FU251F transmitting tube appearance * 4, 6, 8 Tube cap, glue heater Tube base ring Part 2 Maximum size Part 3 Maximum size Screen grid Control grid Screen grid Figure A2FU251F type transmitting tube pin connection diagram SJ20022—92 Appendix B Visual inspection (Supplement) B1 The marking of the transmitting tube shall comply with the regulations, be clear and firm. B2 The welding seam of the transmitting tube shall be smooth and flat. The anode radiator of the transmitting tube shall be evenly distributed and neatly arranged, and no obvious distortion and deformation shall be allowed. B3 The coating of the transmitting tube shall be bright, and no acid marks shall be allowed to remain. B5 The ceramic surface of the transmitting tube shall be clean. Appendix C Current distribution test method (Supplement) C1 Definition C1.1 Current distribution Electronic tube current distribution refers to the current flowing through each anode loop when the anode current reaches the specified value under the specified working conditions. C1.2 Pulse emission current drop Electronic tube pulse emission current drop refers to the drop value of the pulse trailing edge of the cathode pulse emission current to the top of the leading edge under the specified working conditions. C2 Test principle diagram Drum test tube In the figure: P, P: a pulse voltmeter or oscilloscope 1R ZWD a DC regulated power supply, the voltage should be kept stable within the pulse duration; S a single-pole four-position switch; P a pulse signal generator; R,~R, non-inductive resistor. Additional Notes: 0.200..050 SJ20022-92 Appendix D Constant Current Characteristic Curve (Reference) Anode Voltage (V) Anode Current (A) Curtain Grid Current (A) Controlled Anode Current (A) FU251F Transmitter Constant Current Characteristic Curve This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. 0 (U350V) This standard is drafted by China Electronics Technology Standardization Institute and Yichang Electronic Tube Factory. The main drafters of this standard are Tong Jinlin, Zhang Zhongquan, Hu Shanqiong and Sun Lixin. Project code: B91034. Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.