This standard specifies the test method for the transconductance and amplification factor of the transmitting tube. This standard is applicable to the test of the anode ion current of the space charge controlled oscillation, modulation, adjustment and power amplifier tube with anode dissipation power above 25W. GB/T 3789.7-1991 Test method for electrical performance of transmitting tube Test method for anode ion current GB/T3789.7-1991 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Test methods for electrical properties of transmitting tubes
Test methods for anode ion current
Measurements of the electrical properties of transmitting tubesMeasuring methods ot anode lon currentSubject content and scope of application
This standard specifies the test methods for anode ion current of transmitting tubes. GB/T .3789. 7—91
Replaces GB 3789,783
This standard applies to the test of anode ion current of space charge controlled oscillation, modulation, adjustment and power amplifier tubes with anode dissipation power of more than 25 W
2 Reference standards
GB/T3789.1 Test methods for electrical properties of transmitting tubesGeneral 3 TerminologybZxz.net
Anode ion current anode lan current
Anode ion current refers to the current formed by positive ions absorbed by the anode after ionization of the residual gas in the electron tube under the specified working conditions.
Electrical schematic
5 Test equipment and test rules
Test equipment and test rules should comply with the provisions of GB/T 3789.1. 6 Test method
When the switch "s\ is closed, add the filament voltage and the voltage of each pole according to the specification. After a certain time (the time is specified in the detailed specification), open the switch "S", and the current read on the microammeter is the anode ion current. Approved by the State Administration of Technology Supervision on 1991-08.-15 and implemented on 1992-04~01
GB/T 3789.7-9T
Note that the anode current value read actually includes the spectrum current component in addition to the anode high ion current. In order to reduce the test error, the grounding point in the electrical schematic diagram is allowed to be changed (for example, the anode is allowed to be grounded for water). In addition,
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and Factory 779.
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