9-pin premium ceramic tube socket used for magnoval (EL504/EL519 size) base tubes. Can be top mounted or bottom mounted, using unique ring mount. Great replacement for vintage amplifiers and other equipment.

Ceramic Material Physical Index:

• Volume density: >2.7 g/cm^3
• Swell modulus: <8x10^-6mm/℃
• Secant of depletion: <8x10^-4
• Intensity of breakdown: 20 KV.mm
• Intensity of resisting fold: 1400 Kgf/cm^2
• Intervene current normal number: <7.5
• Resistivity: >10^12Ω*cm

Chemistry Composition(weight percent):

• SiO2: 57.5~58.5
• Al2O3:3.7~4.7
• Fe2O3: <0.15
• R2O: <0.3
• BaO: 7.5~8.5
• MgO: 27.5~29.5
• Scorching hot impurity: <0.8

Metal Lug Chemical Element (%)

• Cu: remainder
• P: 0.1~0.25
• Fe: ≤0.05
• Zn: /
• Sn: 6~7