Popular "50 Watt" tube socket for tubes such as the 211 , 872A, and others with E.I.A. base no. A4-29. Mounts above chassis through 2.813" (71.45mm) diameter circle.
Base: Porcelain, glazed top and sides (Commercial Grade)
L-432 steatite, DC-200 treated (Industrial Grade)
Shell: Aluminium per QQ-A-200/B, iridited
Contacts: Phospher bronze per QQ-B-750, .0001 "
nickel plated (Commerical Grade)
Beryllium copper per QQ-C-533, .0001 "
silver plated (Industrial Grade)
• Securely holds tube
• Double wiping filament contacts handle heavy current
• Solder or threaded stud terminals
• Nuts furnished.
Same as SK211