Valve hum shield grounding point

[ggizzy]

Good afternoon,

I have been redoing the chassis wiring inside an old Leak power amplifier. I have replaced the V1 and V2 sockets with new, Micalex ones with the skirt around the base to accept the shield.

I've attached wires to the skirt to ground the base and shield when it's attached. Should these be grounded at the point where the cathode meets ground? This appears to be the node ground point for both of these stages. Thanks!

Also, if anyone knows the part number for or where to find those older nine pin sockets that have the center metal base, I'd be most appreciative! I'd like to actually attach a V-plate shield around this near where the heaters meet the socket, as outlined in some of the old vpentode datasheets.

 

[jaymanaa]

I've seen them grounded right where they are, to the chassis. The chassis in reality acts as a big RF shield, so as long as you get the tube sheilds attached to it, you sold be good. Of course it wouldn't hurt a thing, to take them to a star or the like.

 

[ggizzy]

Thanks jay, I appreciate it!

Edit: This is what I was attempting to refer to earlier. Taken from EF40 datasheet, but same concept applies, I believe.