1、7 . EIA TEP173 70 W 3234600 0008504 2 W - SEPTEMBER 1970 RECOMMENDED PRACTICE FOR QUALITY CONTROL OF X-RADIATION EMITTED FROM HIGH VOLTAGE RECTIFIER AND SHUNT REGULATOR RECEIVING TUBES PRICE $1.00 h FORMULATED BY JEDEC ELECTRON TUBE COUNCIL JEDEC PUBLICATION NO. 73A a- - EIA TEP173 70 m 3234b00 0008
2、505 4 m i. - I 9 Published by ELECTRONIC INDUSTRIES ASSOCIATION Engineering Department 2001 Eye Street, N. W., Wdngton, D. C. 20006 c . EIA TEPL73 70 m 3234b00 0008506 b m JEDEC PUBLICATION NO, 7341 RECOMMENDED PRACTICE FOR QUALITY CONTROL OF X-RADIATION EMITTED FROM HIGH VOLTAGE RECTIFIER AND SHUNT
3、 REGULATOR RECEIVING TUBES September, 1.970 The recommended practice described in this Publication was formulated under the cognizance of the JEDEC JT-5 Committee on Low Power Tubes and approved by the JEDEC Electron Tube Council. This material is especially intended to aid in the preparation of dat
4、a sheets for JEDEC regis- tration purposes. c I e 1 - EIA TEP173 70 m 3234b00 0008507 8 = RECOMMENDED PRACTICE FOR QUALITY CONTROL OF X-RADIATION - EMITTED FROM HIGH VOLTAGE RECTIFIER AND -SHUNT FEGULATOR RECEIVING TUBES PURPOSE AND SCOPE 1.1 Purpose - To establish the statistical acceptance criteri
5、a for controlling soft x-radiation from high voltage receiving tubes initially and during life. 1.2 Scope - These statistics apply to the measurement of x-radiation emitted from high voltage rectifiers qnd shunt regulators. These x-radiationsare considered as the soft x-ray variety emanating from th
6、e tube and produced by an accelerating po- tential in excess of 10,000 volts. 2. APPLICABU DOCUMENTS * e 2.1 JEDEC Publication No. 67 - “Recommended Practice for the Measure- ment of X-Radiation from Receiving Tubes. 11 2.2 Military Standard - MIL-STD-105D - . II Sampling Procedures and Tables for I
7、nspection by Attributes“. 2.3 JEDEC Publication No. 68 - “Glospary of Recommended Quality Control and Reliability Terms“. 3. APPARATUS (EQUIPMENT) AND TEST PROCEDURES 3.1 Testing shall be conducted with the equipment and procedures specified in JEDEC Publication No. 67. 3.2 Test Conditions - Electri
8、cal test conditions of the tube under test shall be the Industry Maximum Ratingsas described in JEDEC Publication No. 67 and which appear on the individual EIA Tube Registration (Release) * * The latest issue of all documents shall be used. EIA TEP173 70 m 3234600 0008508 T m I 1 4, SAMPLING TABUS 4
9、.1 Sampling of each lot shall be conducted using the general concepts of Military Standard MIL-STD-105D and the specific details of this publication. ” 5. PRODUCTION LOT 5.1 A manufactured or inspection lot shall be defined as a group of completed tubes of one type which are manufactured under essen
10、tially the same conditions with respect to material, construction, and processing during a maximum period of 24- hours. For extremely low production types (less than 2000 tubes per day), tubes manufactured during a production run of one week may be accumulated into one production lot with a maximum
11、of 10,000 tubes for the weeks production. 6. DATA AND RECORDS a 6.1 Data for records purposes shall be maintained in accordance with JEDEC Publication No. 67 on at least twenty tubes taken at random from each lot. The acceptance data shall be recorded in accordance with the Instructions described he
12、rein. The data shall be identified with each lot. 7 . SAMPLING PROCEDUmS 7.1 Sampling of each lot shall be performed after all manufac- turing operations are completed. Samples shall be randomly drawn from the lot so as to represent, as accurately as possible, the inherent x-radiation characteristic
13、 of the lot. Sampling shall be conducted on a regular defined basis which is adequate to meet the requirements given below. Normal inspection shall be used initially. Reduced sampling is not permitted. d EIA TEP173 70 W 3234600 0008509 1 W 6 7.2 Sampling Procedures (Initial) Sample Size: Code Letter
14、 K Acceptable Quality Level: 0.4 7.3 Sampling Procedures (Life) Life test samples shall be drawn at random from each weeks production. 7.3.1 Sample Size: Code Letter B Acceptable Quality Level: 4.0 Life Test Duration: 500 $! operating hours. 8. TEST CONDITIONS 8.1 ?-Radiation Test (Initial and .ring
15、 Life Reading Periods) - The tubes of the sample shall be tested per JEDEC Publication No. 67. 8.2 Life Test Operating Conditions - The following general require- ments shall apply: Conditions shall be those applied that will operate the tube at or near the Industry Maximum Raeings. operated at TV r
16、eceivers i30 + 2V ac line may be use? for this test. - 8.2.1. Rectifiers . The tubes of the life test sample shall be operated under fly-back conditions. Heater Voltage - Heater voltage shall be at the rated center value, or greater, but not to exceed the Absolute Maximum rating (EIA Release),at lea
17、st 75 percent of the time. Peak Inverse Voltage - The peak inverse voltage (DC plus peak) shall be at or near ithe Absolute Maximum rated value .(EIA Release) at least 75 percent of the time. EIA TEP173 70 m 3234b00 0008510 8 m B 1 Reading Periods: Tubes shall be read initially and at end of life te
18、st per JEDEC Publication No. 67. 8.2.2 Regulators Heater Voltage - Heater voltage shall be maintained at the rated value (EIA Release) or above, Plate Voltage - Elate voltage shall be at or near the Absolute Maximum rated value (EIA Release). DC Plate Current - DC plate current shall be at or near t
19、he Absolute Maximum rated. value (EIA Release), without ex- ceeding the Absolute Maximumpiate dissipation rating (EIA Release). . Reading Periods: Tubes shallbe read initially and at end of life test per JEDEC Publication No. 67. 9. LIMITS- Maximum initial and life test limits shall be determined by
20、 the manufacturer sufficiently below the published ma.ximum value a (EIA Release) to insure adequate product control. 10. ACCEPTANCE OF PRODUCT - Product which meets the initial individual. lot acceptance criteria and life test requirements shall be accep- ted. Individual lots whose representative s
21、amples do not meet the initial and/or life test requirements shall be rejected. Normal and tightened inspection for initial individual lot accep- tance shall be performed in accordance with MIL-STD-lO5D. 11. PRODUCT IDENTIFICATION Individual tubes shall be coded to identify the production period (not to exceed one week).
