Nice new Johnson style (copy of Johnson 228) ceramic chassis mount sockets for tube types such as 6L6, 6V6, EL34, 6550, KT88, etc. These have 2 piece contacts (plated brass contact with a steel backing spring, see photo) for positive contact with tube pins. These have slots in mounting bracket for mounting holes from 1 3/4 (45 mm) apart give or take about 1/8 inch. |