Detail specification for electronic components-Electronic tube of type FC-306 (Applicable for certification)
Some standard content:
National Standard of the People's Republic of China
Detail specification for electronic component Electronic tube of type FC-306
(For certification)
This specification specifies the detailed requirements for FC-306 type electronic tube. This standard applies to FC-306 type electronic tube. GB11448-89
Reduced to SJ/T11078-96
This standard is formulated in accordance with GB6257 "Blank Detailed Specification for Low-Power Transmitting Tubes with Anode Dissipation Power Not More Than 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 Administration of Technical Supervision, quality assessment according to GB6255, GB11448. This tube is a glass shell, double-beam quaternary tube with a side-heated oxide cathode. It can be used for mobile radio stations, for high-frequency amplification and oscillation, frequency multiplication and low-frequency modulation, and can also be used as a broadband amplifier output tube in an oscilloscope, a hard tube modulator or pulse modulator in a radar. The tube has an internal neutralizing capacitor, whose capacitance is approximately equal to the direct grid capacitance, which ensures neutralization in the entire frequency band.
FC-306
GB11448-89
Total 10 pages
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Maximum 46
Maximum point 49
*601? sauce
0*0014
f.: minimum 0
1 Supplementary information
GB11448—89
1.1 Marking
1.1.1 The following markings shall be on the tube and (or) the package: a.
Manufacturer's trademark;
Model:
Time;
Qualification mark;
Others.
1.1.2 The packaging box shall 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: Required product model;
Detailed specification number and release date;
Others.
1.3 Relevant documents cited in detailed specifications: GB6257, GB6255.1.4
Requirements for qualified test records: Not applicable. Electron tubes with similar structures: FU-19.
Additional information: Not applicable.
Performance (not for inspection)
General performance and mechanical properties
Mass (weight)
Minimum value
Maximum value
2 Installation position: Vertical direction, with the bottom of the tube facing up or down. Horizontal direction is allowed for fixed equipment, but the anode tube pins should be on the same horizontal plane. 2.1.2
3 Cooling conditions: Natural cooling. When the frequency is higher than 150MHz, the anode tube pins should be blown. 2.1.3
2.1.4 Maximum temperature of tube shell
2.1.5 Maximum temperature of tube bottom seal
2.1.6 Maximum temperature of anode tube needle seal
2.1.7 Maximum working altitude
2.2 Electrical parameters - rated values
2.2.1 Capacitance between electrodes
2.2.1.1 Input capacitance
2.2.1.2 Output capacitance
2.2 .1.3 Cross-circuit capacitance
2.2.2 Internal amplification factor
2.2.3 Transconductance at specified anode current (I.=30mA) 250
Rated value
m\/min
2.2.4 Characteristic curve
2.2.4.1 Relationship between anode current, screen grid current and control grid current and anode voltage: At specified control grid voltage and screen grid voltage, see Appendix A1.
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2.2.4.2 Constant current curve -
GB11448-89
-Relationship between control grid voltage and anode voltage: Under the specified screen voltage and anode current or screen grid current or control grid current, see Appendix A2. 2.2.5 Working conditions: High frequency Class C telegraph
Filament voltage
Control grid DC voltage
Anode DC voltage
Curtain grid DC voltage
Control grid peak excitation voltage
Anode DC current
Curtain grid DC voltage Current
Control grid current
Signal between two control grids
Peak voltage
Output power
Control grid circuit resistance
2.3 Electrical parameters - limit values
2.3.1 Limit values
Minimum heating time
Maximum filament impulse current
Filament current
(When filament voltage is rated value) Parallel
Maximum control grid circuit resistance
5Cathode-filament voltage
2.3.2 Limit values at specified frequencies (below 30MHz) 2.3.2. 1
Filament voltage (series) allowable working deviation (parallel) allowable working deviation
Maximum anode DC voltage: Class C telephone
Class C telegraph
Maximum screen grid DC voltage
Maximum control grid DC negative voltage
Maximum anode current: Class C telephone
Class C telegraph
Maximum cathode current: Class C telegraph
Maximum control grid current
Maximum anode dissipated power: Class C telephone
Class C telegraph
Two units in parallel
Minimum value
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Two-unit push-pull
2×100
Maximum value
2×110
2×120
2×100
GB11448-89
2.3.2.9 Maximum screen grid dissipation power:
a. Anode and screen grid are modulated together, under carrier conditions b. Anode is modulated alone
2.3.2.10 Maximum control grid dissipation power 3 Test items and inspection requirements
Group A is inspected batch by batch
All tests are non-destructive (ND). Citation GB6255
Inspection or test
Appearance inspection
Filament current
Control cabinet pole
Reverse current\
Control grid
Curtain grid
Current"
Pulse emission 2
Output power"
Interchangeable dimensions
Leakage current between electrodes
Test conditions
Non-working state
Ur=12.6Vt=300S
(Series)
Ui=12.6VU.=600VUa=250V
(Series)
Uf=-12.6V
I.=34mA t=180s
Ue2=250V
(series connection)
Ug2=250V
(series connection)
I=40mA
U,-U,-U.-225V
(series connection)
Rl-500f-50HzT=2~10μs
Class C amplified=460~490MHz
U,=12.6VU.=500V
(series connection)
U≤250VI.≤200mA125mA
Rgl10~25km
In≤6mA
Non-working state
U,=12.6VUa=±100V
(series)
Note: 1) Each unit is measured separately, and the control gate of the unit not tested should be connected to a 100V voltage. The minimum value
maximum value
see Appendix B
see the appearance drawing
2) Two units are connected in parallel;
3) The output power is the total power transmitted to the load at the excitation frequency. The output circuit is adjusted to a board power consumption of no more than 2X20W. rYKAOMrKAa
Inspection or test
(six-month cycle)
Dimensions to be controlled
Capacitance between electrodes:
Input capacitance
Output capacitance
Cross-circuit capacitance
D or ND
Citing GB6255
GB11448-—89
Periodic inspection
Test conditions||tt ||Minimum value
Non-working state
Maximum value
See appearance drawing
14 (center value)
GB7274
Note: ①When two units measure the capacitance between electrodes respectively, the unit not measured is connected to the ground by 2.11
②When measuring the cross-circuit capacitance C, a metal shielding cover with an inner diameter of 49.5mm and a height of H=20mm is used, which is put outside the glass shell based on the tube seat. D group
Inspection or test
Terminal strength
Vibration stability
Motion firmness
D or ND
GB6255
Identification and approval test
Test conditions
Apply a force of 29.4N at a distance of 5mm from the sealing part of the three pins
Maintain for 15min. The pins should not bend or break, and there should be no cracks or gaps at the sealing part. The reverse current of the control gate meets the requirements of A1 group
U,=12.6VU,=250V
(in series)
Ug=225V
a=2.5m/2 f=20~30Hz
R，=20000vertical and horizontal 60s
vertical and horizontal 30min
a=-6m/s2/=20~30Hz
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Minimum value
Maximum value
I,UMeet the inspection requirements of Group A
6 months
6 months
6 months
Inspection or test
Steady damp heat test
Durability test:
Test end
Output power
D or ND
GB6255
Note: ①D. Destructive test.
②ND: Non-destructive test.
③IL. Check level.
①AQL: qualified quality level.
③p: test period, month.
③n: sample size.
①c: qualified judgment number.
GB11448-89
Test conditions
Temperature is 40±2℃, relative humidity is
93% (allowable difference is 2%~3%)
f≤30MHzh-500h
U(=12.6VU.-700V
(series)
U=250V
Ul-80VUm≤120V
I.85x2mAIg25mA
I≤4×2mA
Minimum value
Maximum value
—I meets the requirements of Group A
6 months
6 months
Delayed delivery
Electronic tubes that have passed the quality consistency inspection and have a storage period of more than 12 months must be re-inspected according to the following items before delivery. a. Control grid reverse current, re-inspect according to the requirements of Group A2: b. Pulse emission, re-inspect according to the requirements of Group A3. 5 Storage period t=72h|| tt||rYKAOMrKAa
Typical anode and screen grid characteristic curves
100 pieces
GB11448-89
Appendix A
Characteristic curve
(supplement)
U1=25V
Anode voltage, V
Uz2=250V
Anode voltage, V
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Anode voltage , V
Uf-12.6V07-200V
Anode voltage, V
Ut=12.6VUr0-200V
Us1=25V
Anode voltage, V
Utz=250V
A2 constant current curve
Anode current
GB11448-89
Slow board current
Operation voltage, V
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Anode voltage, V
U-12.6VU.2-200V
Baodian Guo
A00=*0
Pole voltage, V
GB1144889
Appendix B
Appearance inspection requirements
(Supplement)
Visual inspection: The glass shell of the electron tube should be clean and transparent, and deformation, scratches and serious evaporation are not allowed. The tube core is not allowed to be seriously oxidized. The parts should be welded firmly, and no welding penetration is allowed. There should be no free moving particles in the tube that cause electrode short circuit and damage the normal operation of the electron tube. 008
Sealing quality: The sealing part of the electron tube should be flat and smooth, and no defects such as cracking, unevenness, whitening, unmelted deformation, etc. are allowed. There should be no opaque sand spots and bubbles that affect the quality of the electron tube. B2
Tube base (bottom) alignment: The tube base should be able to be inserted into the gauge of GB787 "Electronic Tube Base Dimensions" LJ7-2. Tube needle straightness: The tube needle of the electron tube should be straight and parallel to the axis of the electron tube. Clarity, correctness and position of the mark: The mark of the electron tube should be accurate, clear and firm. Coating quality: The electroplating layer of the tube needle is not allowed to peel off, the bottom is not allowed to be exposed, and the metal is not allowed to have defects such as blistering of the coating. Minor scratches are allowed. B5
Additional instructions:
This standard was mainly drafted by Factory 774.
YYKANrKAcaDestructive test.
②ND: non-destructive test.
③IL. Inspection level.
①AQL: qualified quality level.
③p: test cycle, month.
③n: sample size.
①c: qualified judgment number.
GB11448-89
Test conditions
Temperature is 40±2℃, relative humidity is
93% (allowable difference 2%~3%)
f≤30MHzh-500h
U(=12.6VU.-700V
(series)
U=250V
Ul-80VUm≤120V
I.85x2mAIg25mA
I≤4×2mA
Minimum value
Maximum value
—I meets the requirements of Group A
6 months
6 months
Delayed delivery
Electronic tubes that have passed the quality consistency inspection and have a storage period of more than 12 months must be re-inspected according to the following items before delivery. a. Control grid reverse current, re-inspect according to the requirements of Group A2: b. Pulse emission, re-inspect according to the requirements of Group A3. 5 Storage period t=72h|| tt||rYKAOMrKAa
Typical anode and screen grid characteristic curves
100 pieces
GB11448-89
Appendix A
Characteristic curve
(supplement)
U1=25V
Anode voltage, V
Uz2=250V
Anode voltage, V
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Anode voltage , V
Uf-12.6V07-200V
Anode voltage, V
Ut=12.6VUr0-200V
Us1=25V
Anode voltage, V
Utz=250V
A2 constant current curve
Anode current
GB11448-89
Slow board current
Operation voltage, V
YYKAON KAcas
Anode voltage, V
U-12.6VU.2-200V
Baodian Guo
A00=*0
Pole voltage, V
GB1144889
Appendix B
Appearance inspection requirements
(Supplement)
Visual inspection: The glass shell of the electron tube should be clean and transparent, and deformation, scratches and serious evaporation are not allowed. The tube core is not allowed to be seriously oxidized. The parts should be welded firmly, and no welding penetration is allowed. There should be no free moving particles in the tube that cause electrode short circuit and damage the normal operation of the electron tube. 008
Sealing quality: The sealing part of the electron tube should be flat and smooth, and no defects such as cracking, unevenness, whitening, unmelted deformation, etc. are allowed. There should be no opaque sand spots and bubbles that affect the quality of the electron tube. B2
Tube base (bottom) alignment: The tube base should be able to be inserted into the gauge of GB787 "Electronic Tube Base Dimensions" LJ7-2. Tube needle straightness: The tube needle of the electron tube should be straight and parallel to the axis of the electron tube. Clarity, correctness and position of the mark: The mark of the electron tube should be accurate, clear and firm. Coating quality: The electroplating layer of the tube needle is not allowed to peel off, the bottom is not allowed to be exposed, and the metal is not allowed to have defects such as blistering of the coating. Minor scratches are allowed. B5
Additional instructions:
This standard was mainly drafted by Factory 774.
YYKANrKAcaDestructive test.
②ND: non-destructive test.
③IL. Inspection level.
①AQL: qualified quality level.
③p: test cycle, month.
③n: sample size.
①c: qualified judgment number.
GB11448-89
Test conditions
Temperature is 40±2℃, relative humidity is
93% (allowable difference 2%~3%)
f≤30MHzh-500h
U(=12.6VU.-700V
(series)
U=250V
Ul-80VUm≤120V
I.85x2mAIg25mA
I≤4×2mA
Minimum value
Maximum value
—I meets the requirements of Group A
6 months
6 months
Delayed delivery
Electronic tubes that have passed the quality consistency inspection and have a storage period of more than 12 months must be re-inspected according to the following items before delivery. a. Control grid reverse current, re-inspect according to the requirements of Group A2: b. Pulse emission, re-inspect according to the requirements of Group A3. 5 Storage period t=72h|| tt||rYKAOMrKAa
Typical anode and screen grid characteristic curves
100 pieces
GB11448-89
Appendix A
Characteristic curve
(supplement)
U1=25V
Anode voltage, V
Uz2=250V
Anode voltage, V
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Anode voltage , V
Uf-12.6V07-200V
Anode voltage, V
Ut=12.6VUr0-200V
Us1=25V
Anode voltage, V
Utz=250V
A2 constant current curve
Anode current
GB11448-89
Slow board current
Operation voltage, V
YYKAON KAcas
Anode voltage, V
U-12.6VU.2-200V
Baodian Guo
A00=*0
Pole voltage, V
GB1144889
Appendix B
Appearance inspection requirements
(Supplement)
Visual inspection: The glass shell of the electron tube should be clean and transparent, and deformation, scratches and serious evaporation are not allowed. The tube core is not allowed to be seriously oxidized. The parts should be welded firmly, and no welding penetration is allowed. There should be no free moving particles in the tube that cause electrode short circuit and damage the normal operation of the electron tube. 008
Sealing quality: The sealing part of the electron tube should be flat and smooth, and no defects such as cracking, unevenness, whitening, unmelted deformation, etc. are allowed. There should be no opaque sand spots and bubbles that affect the quality of the electron tube. B2
Tube base (bottom) alignment: The tube base should be able to be inserted into the gauge of GB787 "Electronic Tube Base Dimensions" LJ7-2. Tube needle straightness: The tube needle of the electron tube should be straight and parallel to the axis of the electron tube. Clarity, correctness and position of the mark: The mark of the electron tube should be accurate, clear and firm. Coating quality: The electroplating layer of the tube needle is not allowed to peel off, the bottom is not allowed to be exposed, and the metal is not allowed to have defects such as blistering of the coating. Minor scratches are allowed. B5
Additional instructions:
This standard was mainly drafted by Factory 774.
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