This standard applies to TM-90 type (J) pulse modulator tube (hereinafter referred to as "modulator"). This tube is a glass shell, a cathode beam tetrode with side heating. It is used for pulse power amplification in circuits with energy storage capacitors in radio equipment. This standard is a supplement to SJ2-73 "General Technical Conditions for Medium Power Glass Shell Transmitter Tubes" (hereinafter referred to as "General Technical Conditions"). Except for the contents specified in this standard, other provisions shall be implemented in accordance with the relevant provisions of the General Technical Conditions. SJ 1620-1980 TM-90 type (J) pulse modulator tube SJ1620-1980 Standard download decompression password: www.bzxz.net
This standard applies to TM-90 type (J) pulse modulator tube (hereinafter referred to as "modulator"). This tube is a glass shell, a cathode beam tetrode with side heating. It is used for pulse power amplification in circuits with energy storage capacitors in radio equipment. This standard is a supplement to SJ2-73 "General Technical Requirements for Medium Power Glass Shell Transmitter Tubes" (hereinafter referred to as "General Technical Requirements"). Except for the contents specified in this standard, other contents shall be implemented in accordance with the relevant provisions of the General Technical Requirements.

The Fourth Machinery Industry Department of the People's Republic of China Standard
TM-90 type (J) pulse modulator
SJ1620-80
The Fourth Machinery Industry Department of the People's Republic of China Standard
TM90 type (J) pulse modulator
SJ1620-80
This standard applies to the TM-90 type (J) pulse modulator (hereinafter referred to as "modulator"). The tube is a glass shell, a side-heated cathode beam tetrode. It is used for pulse power amplification in circuits with energy storage capacitors in radio equipment. This standard is a supplement to S2-73 "General Technical Conditions for Medium Power Glass Shell Transmitter Tubes" (hereinafter referred to as "General Technical Conditions"). Except for the contents specified in this standard, the rest shall be implemented in accordance with the relevant provisions of the General Technical Conditions. 1 The outer dimensions and electrode wiring of the modulator (S2-73 Article 2) shall comply with the provisions of the outer dimensions and electrode wiring diagram. 2: The parameter specifications of the modulator shall comply with the provisions of the parameter specification table. Issued by the Fourth Machine Industry Ministry of the People's Republic of China
January 1, 1981
Total 7 pages Page 2
Based on the test category and items
Parameters and test names
Cathode underheated anode pulse current
Electrical strength test (dynamic)
Anode pulse current
Anode average current
Second grid average current
Third grid average current
Electrical strength test (static)
81QFirst grid cut-off voltage
9JQFilament current
10JQFirst grid thermal radiation current
11LXVibration firmness test
12LXGlass thermal stability test|| tt||13LX Thermal stability test of glass and metal seal 14|Lx Low temperature test
15LX Humidity test
16LX Input capacitance
17LX Output capacitance
18LX Transition capacitance
19LX Weight
20SM Filament intermittent test
21SM Life test
(1) Average current of the first grid
(2) Anode pulse current
Preheating conditions
Unit of measurement
SJ1620—80
Social rat unit
Limit value
Maximum value
Minimum value
Dynamic acceleration
SJ162 0-80
*The parameters using the limit value shall not exceed "; Py
Limit value*
**For stable operation, the anode voltage should generally not exceed 27kV. Pa
Test method
SJ22679(3)
SJ250—79(2)
SJ226—79(3)
SJ226—79(3)
SJ1489—79
SJ1489—79
SJ25079（2）
SJ238-79
SJ349-—73
SJ231-79(1)
SJ24179(2 )
SJ241—79(2)
SJ241—79（2）bzxz.net
SJ1489-79
SJ226—793)
Page 3 of 7 pages
Acceptance rules
Page 4 of 7 pages
Φ72±0.5
中145
SJ1620
Pin number
Electrode cap (A)
Appearance and electrode connection diagram
Cathode filament
Second grid
First grid
Cathode, filament
SJ1620-80
3. Vibration firmness test (Article 16 of SJ2—73). Total 7 pages Page 5
After the test, there should be no mechanical damage (ceramic particles are allowed in the modulating tube), and the "JQ" class electrical parameters should comply with the provisions of the parameter specification table. Mechanical damage is inspected by appearance method.
4. Thermal stability test of glass and metal seal (SJ2--73 Article 21). After the test, there should be no cracking and vacuum deterioration at the seal. Inspect by appearance method and spark leak detector.
5. Low temperature test (SJ2-73 Article 25). There should be no mechanical damage after the test.
Inspect by appearance method.
6. Humidity test (SJ2-73 Article 26). There should be no mechanical damage and rust after the test, and the "JQ" class electrical parameters should comply with the provisions of the parameter specification table. Mechanical damage and rust are inspected by appearance method. 7. Electric strength test
During the test, the relay shall not trip more than 5 times due to sparking in the modulator tube within the last 2 minutes of the specified test time. Otherwise, the test is allowed to be extended for 2 minutes. In the extended 2 minutes, the relay shall not trip more than 3 times due to sparking in the modulator tube, and the test is considered to be qualified.
Belongs to the "JQ" category project.
Note: The overload current of the relay is 100mA.
8. Routine test items are carried out quarterly (SJ2-73 Articles 36 and 38). 9. If the routine test fails the initial test, double the number of modulator tubes should be taken for retest according to the original assessment standard (SJ2--73 Article 40). 10. Life test (SJ2-73 Article 41, Article 42, Paragraph 1). The life test is carried out once every quarter, using 2 modulator tubes. 11. Filament intermittent test (SJ2-73 Article 42, Paragraph 2). The test is conducted with two modulators. The filament voltage of the modulator is turned on for 2 minutes and off for 2 minutes, and the test is conducted 1000 times. After the test, the filament current value shall meet the requirements of the parameter specification table. For modulators whose filament current value is near the critical value before the test, it is allowed to exceed the requirements of the parameter specification table after the test, but it shall not exceed 5% of the initial value. Note: It is allowed that some items of the same process are unqualified, but it does not affect the modulator of the test assessment. 12. Acceptance rules for life test (Article 43 of SJ2-73). During the life test, the test hours shall not exceed the specified standard hours. At the end of the test, the average value of the total life hours of the tested modulators shall not be less than 90% of the standard hours to be qualified. Otherwise, the same number of modulators shall be taken for retest according to the original assessment standards. The time for testing the standard parameters of life during the life test is as follows: 25, 50, 100, 150, 200, 240, 270, and 300 hours from the start of the test.
13. Acceptance rules for filament intermittent test (Article 43 of SJ2-73). At the end of the test, the tested modulators shall all comply with the provisions of Article 11. Otherwise, the same number of modulators shall be retested according to the original assessment standards.
14. The packaging test shall be carried out in accordance with Article 48, Paragraph 2 of SJ2-73. 15. When the modulator is working, the maximum temperature of the glass shell shall not exceed 170°C. 16. When the modulator is testing the electrode current, the pulse waveform shall be based on the current pulse waveform. 17. Articles 12, 14, 15, 17, and 24 of the general technology do not apply to this modulator. Total 7 pages Page 6
SJ1620-80
Electron tube pulse characteristic curve
Ug1M=2000V
Anode voltage (kV)
Ug1M=250V
Anode voltage (kV)
jUg2=2000v-
1500V-
SJ 1620
Ug1M=300V
Anode voltage (kv)
Ua=3000
First grid pulse voltage (V)
Ug2=1750V
Total 7 pages Page 7
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