. The Bell System technical journal . d-band fre-quency of 30 mc the noise figure is about At 100 mc it is about 5. Description of the Design of the Western Electric 6AK5 Tube In order that the reader may have a full appreciation of the dimensionsand other requirements of design to meet the characteristics discussedabove, a detailed description of the 6AK5 tube Mechanical Description The 6AK5 tube is an indirectly heated cathode type pentode employingthe 7-pin button stem and the T-5-1/2 size miniature bulb. The outlinedimensions are shown in Fig. 11. A photograph of a mo
. The Bell System technical journal . d-band fre-quency of 30 mc the noise figure is about At 100 mc it is about 5. Description of the Design of the Western Electric 6AK5 Tube In order that the reader may have a full appreciation of the dimensionsand other requirements of design to meet the characteristics discussedabove, a detailed description of the 6AK5 tube Mechanical Description The 6AK5 tube is an indirectly heated cathode type pentode employingthe 7-pin button stem and the T-5-1/2 size miniature bulb. The outlinedimensions are shown in Fig. 11. A photograph of a mount ready to besealed into a bulb is shown in Fig. 12. Figure 13 is a photograph of atransverse section through the tube at the middle of the structure in a plane * Fluctuations Induced in Vacuum Tube Grids at High Frequencies, D. O. Northand W. R. Ferris, /. R. E. Proceedings, Vol. 29, No. 2, February 1941. Unpublished Technical Memorandum, J. R. Pierce.»«S. E. Miller, V. C. Rideout, R. S. Julian. 402 BELL SYSTEM TECHNICAL JOURNAL. V + 3_ e 32 (MEASURED ATy,g DIAM. ON BULB) + U ^± CATHODE AND -SUPPRESSOR GRID
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