1、 MIL-PRF-1/338J 30 September 2009_ SUPERSEDING MIL-PRF-1/338H 14 July 1998 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, TRANSMITTING TYPE 2E26 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube descr
2、ibed herein shall consist of this document and the latest issue of MIL-PRF-1 DESCRIPTION: Beam power amplifier, F1 = 125 MHz, F2 = 175 MHz. Outline - - - See figure 1. Base - - - B8-26 or B8-44. Cap - - - C1-1. Envelope - - - T9. Cathode - - - Coated unipotential. Base connections: Pin No. 1 2 3 4 5
3、 6 7 8 Cap Element k, g3, int sd h g2 k, g3, int sd g1 k, g3, int sd h base sleeve a ABSOLUTE-MAXIMUM RATINGS: Parameter: Ef Eb Ec1 Ec2 Ib Ic1 Pp Pg2 P1 Ehk Modulation Alt Unit: V V dc V dc V dc mA dc mA dc W W W v - - - ft Maximum: Class A audio: 6.9 300 - - - 200 - - - - - - 10 2.5 - - - 100 - - -
4、 10,000 Class AB2 audio: 6.9 400 - - - 200 75 - - - 10 2.5 30 100 - - - 10,000 Class C Tel: 6.9 400 -175 200 60 3.5 6.7 1.7 20 100 Anode 10,000 Class C Tlg: 6.9 500 -175 200 75 3.5 10 2.5 30 100 - - - 10,000 Minimum: 5.7 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Test conditio
5、ns: 6.3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ GENERAL: Qualification: Not required. AMSC N/A FSC 5960 INCH POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/338J 2TABLE I. Testing and inspection. Inspection
6、 Method MIL-STD-1311 Notes Conditions Symbol Limits Min Limits Max Unit Conformance inspection, part 1 Total grid current Emission Electrode current (anode) Electrode current (screen) Short and discontinuity detection 1266 1231 1256 1256 - - - 1 1 Eb = 500 V dc; Ec2 = 200 V dc; Ec1/ Ib = 20 mA dcEb
7、= Ec1= Ec2 = 25 V dc Eb = 200 V dc; Ec2 = 135 V dc; Ec1 = -10 V dc Eb = 200 V dc; Ec2 = 135 V dc; Ec1 = -10 V dc Ic1 Is Ib Ic2 - - - 0 130 23 - - - - - - -3.0 - - - 47 4 - - - A dc mA dc mA dc mA dc - - - Conformance inspection, part 2 Heater current Heater-cathode leakage Power oscillation (1) Dire
8、ct-interelectrode capacitance Low-frequency vibration Secureness of base, cap, or insert Base pin solder depth Permanence of marking 1301 1336 1236 1331 1031 1101 1111 1105 2 3 3 3 Eb = 500 V dc; Ec2 = 200 V dc; Ib = 60 mA dc; Ic1 = 2 mA dc; Rg1 = 15,000 ; F = 15 MHz No shield Eb = 250 V dc; Ec2 = 2
9、00 V dc; Ec1/Ib = 10 mA dc;Rp = 2,000 If Ihk Po Cg1a Cin Cout Ep - - - - - - - - - 740 - - - 18 - - - 11.6 6.0 - - - - - - - - - - - - 860 50 - - - 0.2 14.4 8.0 500 - - - - - - - - - mA A dc W (useful power) pF pF pF mV ac - - - - - - - - - See footnotes at end of table I. Provided by IHSNot for Res
10、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/338J 3TABLE I. Testing and inspection. - Continued. Inspection Method MIL-STD-1311 Notes Conditions Symbol Limits Min Limits Max Unit Conformance inspection, part 3 Life test Life-test end point (500 hours): Emission P
11、ower oscillation (2) Base material insulating quality - - - - - - 1231 1236 1216 3 3 Group C; Eb = 500 V dc; Ec2 = 200 V dc; Ec1/Ib = 20 mA dc Eb = Ec1 = Ec2 = 25 V dc Eb = 400 V dc; Ec2 = variable; Ic1 = 2mA dc; Ib = 75 mA dc; F = 125 MHz; Rg1 = 25,000 Zone 5 (min) - - - Is Po - - - - - - 100 15 -
12、- - - - - - - - - - - - - - - - - mA dcW (usefulpower)- - - NOTES: 1. This test shall be performed at the conclusion of the holding period. 2. The base sleeve shall be tied to the cathode for each capacitance measurement. 3. This specification sheet uses accept on zero defect sampling plan in accord
13、ance with MIL-PRF-1, table III. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/338J 4Dimensions in inches with metric equivalents (mm) in parentheses. Ltr Minimum Maximum Conformance inspection, part 1 A 3.344 (84.94) 3.656 (92.86) B 1.312
14、 (33.32) C 1.062 (26.97) 1.188 (30.18) D 2.781 (70.64) 3.094 (78.59) FIGURE 1. Outline drawing of electron tube type 2E26. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/338J 5Referenced documents. In addition to MIL-PRF-1, this document r
15、eferences the following: MIL-STD-1311 The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders
16、and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 (Project 5960-2009-032) DLA - CC Rev
17、iew activities: Army - AR Navy - AS, CG, MC, OS NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
