SJ/T 11083-1996 Detailed Specification for Electronic Devices FU-250F Electron Tube (for certification) SJ/T11083-1996 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Detail specification for electronic component Electronic tube of type FU-250F
Detail specification for electronic component Electronic tube of type FU-250F (available for certification)
This standard specifies the detailed requirements for FU-250F type electronic tube GB11488-89
Reduced to SJ/T1108396
This standard applies to FU-250F type electronic tube. This standard is formulated in accordance with GB6257 "Blank Detailed Specification for Low-Power Transmitting Tubes with Anode Dissipation Power Not Exceeding 1kW" and meets the requirements of GB6255 "General Specification for Space Charge Controlled Electronic Tubes". The standard organization of the China Electronic Components Quality Certification Committee is the China Electronics Technology Standardization Institute. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 21, 1989, implemented on March 1, 1990, State Bureau of Technical Supervision, quality assessment according to GB6255, the tube is a side-heated oxide cathode, air-cooled, electron-injected power quadrupole, the outer shell is metal ceramic sealed, the tube is a coaxial cylindrical structure, the maximum anode dissipation power is 250W. Applicable to single-band communication, radio and television and other ultra-short wave radio equipment and power amplification, voltage amplification, frequency modulation, frequency multiplication FC-250F
GB11488-89
Total 10 pages
Minimum size
rYKAoMrKAa
Maximum size
1 Supplementary information
1.1 Marking:
GB11488-89
1.1.1 The following marks should be on the electron tube and (or) the package: a.
Manufacturer's trademark;
Model:
Time;
Qualification mark;
Others.
The packaging box should be marked with a mark that meets the relevant requirements of GB191 "Packaging Storage and Transportation Pictorial Marking". 1.2 Ordering information:
The ordering party shall accurately fill in the following contents on the order form: a.
Required product model:
Detailed specification number and release date:
Other.
1.3Related documents cited in detailed specifications: GB6255;
GB6257.
1.4Requirements for qualified test records: Not applicable. 1.5Electronic tubes with similar structures:
FU-251F.
Additional information, not applicable.
Performance (not for inspection)
General performance and mechanical properties
Minimum value
Mass (weight)
Installation position:
2.1.3 Cooling conditions:
2.1.4 Maximum temperature of tube shell
2.1.5 Maximum temperature of sealing
2.1.6 Maximum temperature of lead end (anode core) 2.2 Electrical parameters - rated values
2.2.1 Capacitance between electrodes
2.2.1.1 Input capacitance||tt| |2.2.1.2 Output capacitance
2.2.1.3 Cross-circuit capacitance
2.2.2 Amplification factor (first grid to second grid)3 Transconductance at specified anode current
2.2.4 Characteristic curve
2.2.4.1 Constant current curve
Maximum value
Rated value
Relationship between control grid voltage and anode voltage: Under specified screen grid voltage and anode current or screen grid current YKAONrKAcas
current or control grid current. See Appendix A1. GB11488—89
2.2.4.2 Relationship between dissipated power and air flow at the inlet: When the electron tube works at the maximum anode dissipated power and the highest ambient temperature of 25℃, the minimum air flow through the anode heat sink should be 0.2m/min and the static pressure drop should be 74.8Pa. The above values ​​are only applicable to the working state with grid bias voltage lower than 100V and frequency lower than 500MHz. The cooling air volume of the electron tube increases with the increase of grid bias voltage or frequency.
2.2.5 Working conditions
2.2.5.1 Below the recommended maximum working frequency: 500MHz2.2.5.2
At the recommended maximum working frequency:
Working state
Maximum value
Test conditions
AB, Class
26.5±%1000
Reduce the filament voltage when working at high frequency
Frequency, MHz
300 and below 300
301~ 400
401~500
2.3 Electrical parameters
-Limit value
2.3.1 Limit value
2.3.1.1 Minimum heating time
2.3.1.2 Filament current
2.3.1.3 Control grid current
2.3.1.4 Cathode
Filament peak voltage
Positive potential
Negative potential
2.3.2 Limit value at specified frequency
2. 3.2. 1
Allowable operating deviation of filament voltage
Maximum anode DC voltage
2.3.2.3Maximum screen grid DC voltage
Maximum control grid negative DC voltage
Maximum average anode current
5Maximum screen grid dissipation power
Maximum anode dissipation power
Maximum total control grid dissipation power
3Test items and inspection requirements
Minimum value
Filament voltage, V
Maximum value
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Preheating time
All tests are non-destructive (ND). Inspection or test
Appearance inspection
Filament current
Control grid
Reverse current
Curtain pole current
Control grid
Pulse emission current
Current distribution
Output power
GB6255
Non-working state
GB11488-89
A—-Batch inspection
Test conditions
U26.5±5%V
Ua adjustment
U,=1000V
Uga=300V
U adjustment|| tt||I,=150mA
U2=300V
Un adjustment
I,=150mA
U.-Uga=250V
U=-100V
Uk adjustment,=1.5A;
Pulse repetition rate 111Hz
r=4500μs(min)
U.=Ue-250V
Ug=-100V
Ua adjustment;i.=1A;
Pulse repetition frequency 11±1Hz
t=4500μs(min)
AB,Class Amplifier
f-30MHz
U=1500V
U=400V
-6mA≤Ig≤20mA
Ug=-65V
30μA≤15μA
t=300s(max)
rYKAOMrKAa
Inspection requirements
Maximum value unit
Minimum value
See Appendix B
Inspection or test
Interchangeability scale
Filament cathode
Leakage current between electrodes
Insulation resistance
GB6255
Inspection or test
(cycle one month)
Control grid radiation
Curtain grid radiation
(cycle six months)
Capacitance between electrodes:
Cross-circuit capacitance
Input capacitance
Output capacitance
Size to be controlled
Non-working state
Us=+150V
Uk-——150V
GB11488--89
Test conditions||tt| |Turn off the filament voltage and measure it 30 minutes later, use 500V megohmmeter to measure
Non-working electrode should be suspended
D or ND
GB6255
Jg=70mA
tr120s
t=1208
Iz=100mA
GB7274
Non-working state
Periodic inspection
Minimum value
Inspection requirements
Maximum value
See the appearance drawing
Inspection requirements
Maximum value||tt| |Minimum value
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See the appearance drawing
Inspection or test
Vibration test
End of vibration test
Test A2 group parameters
Constant damp heat test
Test after constant mixed heat test:
Control grid current
Durability test:
Durability test test
Starting output power
100h control grid current
500h output power
D or ND
Note: ①D: destructive test.
②ND: non-destructive ring test.
?IL: inspection level.
④AQL: qualified quality level.
?p: test cycle.
?n: sample size.
c: qualified judgment number.
4Delayed delivery
CB1148889
GB6255
Identification and approval test
Test conditions
a=5m/g2
=50+1Hz
t30min
T=40±2C
Relative humidity 93%
U,=26.5±5%V
U=300V
U. Adjustment,,=150mA
t=120s
Class AB amplifier
f=30MHz
U,=1500V
I-250V
Um-400V
-6mA≤1g≤20mA
30mA≤Ig15μA
Ug=-65V
Minimum value
Inspection requirements
Maximum value
For electron tubes that have passed the quality consistency inspection and have a storage period of more than 6 months, the following items must be re-inspected before delivery: Control grid reverse current, re-inspect according to the requirements of Group A2; a.
Pulse emission current, re-inspect according to the requirements of Group A3. b.
rYKAOMrKAa
A1 Constant current curve
GB11488-89
Appendix A
Characteristic curve
(supplement)
400（mA）
Usz=250Y
Anode voltage, V
-TY KAONT KAca
400(mA)
GB1148889
Ur-=26.5V
Uer=350V
Anode voltage, V
YYKAONKAcas
1400(mA)
B1Main defect inspection
GB11488-89
Appendix B
Appearance inspection standard
(Supplement)
B1.1The pipe cap is firm and does not loosen or rotate. Manual inspection. B1.2The heat sink is arranged evenly and neatly, and the protrusion on the upper end face of the ring does not exceed 0.4mm. No completely desoldering heat sink is allowed, and the total number of partially desoldering heat sinks does not exceed 6. Visual inspection. B1.3 The cathode lead pins, i.e., pins 2, 4, 6, and 8, should have good electrical connection, and disconnected pins are not allowed to exist. Use a multimeter or special instrument for random inspection.
B1.4 The electroplating layer is basically not exposed, without verdigris, acid marks, fingerprints, peeling, blistering, and the color is basically consistent. Visual inspection. B2 Minor defect inspection
B2.1 The diameter of the weld bead on the contact surface of the rat arc welding is greater than 0.4mm, which is unqualified: due to the rheology of the base metal caused by excessive welding heat, the starting and ending points exceed 0.8mm, which is unqualified.
B2.2 The depth of the indentation of the grid lead ring is greater than 0.5mm or the diameter is greater than 1.6mm, which is unqualified. There should be no more than 2 indentations on any quarter of the lead ring, and a maximum of 4 indentations are allowed for the entire lead ring. B2.3 The scratch depth of the anode ring is greater than 0.4mm, and the length or width is greater than 12.5mm, which is unqualified. The roughness is not more than 0.03mm (referring to the machining anode).
B2.4 The porcelain parts should be clean, free of stains, yellow spots, smoke spots, fingerprints, and daily testing. B3 Explanation
B3.1 All kinds of marks and logos should be clear and firm, and the tube numbers should be clear and arranged neatly. B3.2 The tube needle, tube key and their relative positions should meet the design requirements. Additional remarks:
This standard was drafted by Factory 740.
The main drafters of this standard are Cheng Zhang and Hao Baolin. YYKAONrKAca=1500V
I-250V
Um-400V
-6mA≤1g≤20mA
30mA≤Ig15μA
Ug=-65V
Minimum value
Inspection requirements
Maximum value
Electronic tubes that have passed the quality consistency inspection and have a storage period of more than 6 months must be retested according to the following items before delivery: Control grid reverse current, retest according to the requirements of Group A2; a.
Pulse emission current, retest according to the requirements of Group A3. b.
rYKAOMrKAa
A1 Constant current curve
GB11488-89
Appendix A
Characteristic curve
(supplement)
400（mA）
Usz=250Y
Anode voltage, V
-TY KAONT KAca
400(mA)
GB1148889
Ur-=26.5V
Uer=350V
Anode voltage, V
YYKAONKAcas
1400(mA)
B1Main defect inspection
GB11488-89
Appendix B
Appearance inspection standard
(Supplement)
B1.1The pipe cap is firm and does not loosen or rotate. Manual inspection. B1.2The heat sink is arranged evenly and neatly, and the protrusion on the upper end face of the ring does not exceed 0.4mm. No completely desoldering heat sink is allowed, and the total number of partially desoldering heat sinks does not exceed 6. Visual inspection. B1.3 The cathode lead pins, i.e., pins 2, 4, 6, and 8, should have good electrical connection, and disconnected pins are not allowed to exist. Use a multimeter or special instrument for random inspection.
B1.4 The electroplating layer is basically not exposed, without verdigris, acid marks, fingerprints, peeling, blistering, and the color is basically consistent. Visual inspection. B2 Minor defect inspection
B2.1 The diameter of the weld bead on the contact surface of the rat arc welding is greater than 0.4mm, which is unqualified: due to the rheology of the base metal caused by excessive welding heat, the starting and ending points exceed 0.8mm, which is unqualified.
B2.2 The depth of the indentation of the grid lead ring is greater than 0.5mm or the diameter is greater than 1.6mm, which is unqualified. There should be no more than 2 indentations on any quarter of the lead ring, and a maximum of 4 indentations are allowed for the entire lead ring. B2.3 The scratch depth of the anode ring is greater than 0.4mm, and the length or width is greater than 12.5mm, which is unqualified. The roughness is not more than 0.03mm (referring to the machining anode).
B2.4 The porcelain parts should be clean, free of stains, yellow spots, smoke spots, fingerprints, and daily testing. B3 Explanation
B3.1 All kinds of marks and logos should be clear and firm, and the tube numbers should be clear and arranged neatly. B3.2 The tube needle, tube key and their relative positions should meet the design requirements. Additional remarks:
This standard was drafted by Factory 740.
The main drafters of this standard are Cheng Zhang and Hao Baolin. YYKAONrKAca=1500V
I-250V
Um-400V
-6mA≤1g≤20mA
30mA≤Ig15μA
Ug=-65V
Minimum value
Inspection requirements
Maximum value
Electronic tubes that have passed the quality consistency inspection and have a storage period of more than 6 months must be retested according to the following items before delivery: Control grid reverse current, retest according to the requirements of Group A2; a.
Pulse emission current, retest according to the requirements of Group A3. b.
rYKAOMrKAa
A1 Constant current curve
GB11488-89
Appendix A
Characteristic curve
(supplement)
400（mA）
Usz=250Y
Anode voltage, V
-TY KAONT KAca
400(mA)
GB1148889
Ur-=26.5V
Uer=350V
Anode voltage, V
YYKAONKAcas
1400(mA)
B1Main defect inspection
GB11488-89
Appendix B
Appearance inspection standard
(Supplement)
B1.1The pipe cap is firm and does not loosen or rotate. Manual inspection. B1.2The heat sink is arranged evenly and neatly, and the protrusion on the upper end face of the ring does not exceed 0.4mm. No completely desoldering heat sink is allowed, and the total number of partially desoldering heat sinks does not exceed 6. Visual inspection. B1.3 The cathode lead pins, i.e., pins 2, 4, 6, and 8, should have good electrical connection, and disconnected pins are not allowed to exist. Use a multimeter or special instrument for random inspection.
B1.4 The electroplating layer is basically not exposed, without verdigris, acid marks, fingerprints, peeling, blistering, and the color is basically consistent. Visual inspection. B2 Minor defect inspection
B2.1 The diameter of the weld bead on the contact surface of the rat arc welding is greater than 0.4mm, which is unqualified: due to the rheology of the base metal caused by excessive welding heat, the starting and ending points exceed 0.8mm, which is unqualified.
B2.2 The depth of the indentation of the grid lead ring is greater than 0.5mm or the diameter is greater than 1.6mm, which is unqualified. There should be no more than 2 indentations on any quarter of the lead ring, and a maximum of 4 indentations are allowed for the entire lead ring. B2.3 The scratch depth of the anode ring is greater than 0.4mm, and the length or width is greater than 12.5mm, which is unqualified. The roughness is not more than 0.03mm (referring to the machining anode). bzxz.net
B2.4 The porcelain parts should be clean, free of stains, yellow spots, smoke spots, fingerprints, and daily testing. B3 Explanation
B3.1 All kinds of marks and logos should be clear and firm, and the tube numbers should be clear and arranged neatly. B3.2 The tube needle, tube key and their relative positions should meet the design requirements. Additional remarks:
This standard was drafted by Factory 740.
The main drafters of this standard are Cheng Zhang and Hao Baolin. YYKAONrKAca
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