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9-Pin Vacuum Tube Socket Gold Plated Ceramic PC Mount 12AX7 Type
I need to fit this socket to an existing PCB. Can you confirm the exact distance between opposite legs across the circle (diameter) please? I need three for 12AU7 tubes in my preamp project.
The distance from one pin across to another is 13/16" or 20mm.
Date published: 2014-08-26
Recommended PCB layout?
Can you provide a datasheet for the recommended PCB layout for this tube socket?Thanks,Chuck
When I mount tubes (valves) on a PCB, I purchase the sockets and make the layout based on the sockets needs. Typically I scribe a circle equal to the solder tab diameter, then place etching dots in the tab positions and center drill tab holes accordingly.I bend the tabs outward slightly and solder them in place making sure they do not cross a circuit trace or an adjacent pin tab. The 9 pins provide sufficient mechanical hold to secure the tube in place. If I am building for rough use, I use sockets with additional mount tabs for screws. This requires special pc layout that allows for the bolts outside of circuit traces.This is a good socket for a 12AX7 because it is a low weight / mass tube.
Date published: 2012-06-15