GB/T 3789.9-1991 Test method for electrical performance of transmitting tubes Test method for maximum grid dissipation power

This standard specifies the test method for the maximum anode dissipation power and anode overload dissipation power of the transmitting tube. This standard is applicable to the test of the maximum grid dissipation power of the space charge controlled oscillation, modulation, adjustment and power amplifier tube with anode dissipation power above 25W. GB/T 3789.9-1991 Test method for electrical performance of transmitting tube Test method for maximum grid dissipation power GB/T3789.9-1991 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Test method of electrical properties of transmitting tubeswww.bzxz.net
Test method of maximum grid dissipation power
Meanirements of the ehectrical properties ot frandmltting tubesMeasurlag methada of maximum grdd diasipation power Subject content and scope of application
This standard specifies the test method of maximum grid dissipation power of transmitting tubes. GB/T 3789. 9—91
Replacement GB 3789. 9—83
This standard is applicable to the test of maximum dissipation power of the oscillation, modulation, adjustment and power amplifier tubes with space charge control and anode dissipation power above 25W.
2 Reference standards
General principles for testing the electrical properties of transmitting tubes
GB/T 3789. 1
GB/T3789.4 Testing methods for testing the electrical properties of transmitting tubesTest methods for grid reverse current3 Terms
Maximum grid dissipation power3.1 The maximum grid dissipation power refers to the maximum power that the first pole is allowed to dissipate in the form of heat by electron bombardment under the specified working conditions.
3.2 The maximum grid dissipation power refers to the maximum power that the second grid is allowed to dissipate in the form of heat by electron bombardment under the specified working conditions.
Electrical schematic
Test equipment and test rules
The test equipment and test rules should comply with the provisions of GB/T3789.1. Approved by the State Administration of Technology Supervision 1991-08-15 1992-04-01 implementation
6 Test methods
6.1 Test method for maximum power dissipation of the first grid GB/T 3789.9-91
Add the filament voltage and negative anode voltage and negative second grid voltage according to the specification. Adjust the positive voltage of the first grid so that the product of the first grid voltage value and the first grid current value is equal to the specified maximum power dissipation of the first grid, and keep it unchanged within the time specified in the detailed specification (10 minutes if no specification). Then quickly test the reverse current of the first grid on the tested tube according to GB/T3789.4. 6.2 Test method for maximum power dissipation of the second grid Add the filament voltage and negative anode voltage, negative first grid voltage and positive second grid voltage according to the specification. Adjust the negative voltage of the first grid so that the product of the second grid voltage value and the second grid current value is equal to the specified second grid maximum dissipation power, and remain unchanged within the time specified in the detailed specification (10 minutes if no specification). Then quickly test the first grid reverse current of the tested tube according to GB/T3789.4.
Additional Note:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and Factory 779.
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