[Boatanchors] Question

[HL1FB/WW6N]

Some glass tubes for RF such as 6BA6, 6AU6 have a round electrode at the bottom.
You can see it if you look at the bottom of the tube.
It needs be grounded through a capacitance  to the center post in the tube socket.
This is what my understanding has been for the last 40 years with tubes.

--- Original Message ---
From    : "W?QFC"<erastber at tampabay.rr.com>
To      : FLBOATANCHORS at yahoogroups.com, boatanchors at mailman.qth.net
Date    : 2010/02/19 Friday AM 4:15:15
Subject : [Boatanchors] Question

While rebuilding several old rigs and test equipment I have noticed that the 
instructions say to ground the center post of the 7 or 9 pin tube sockets.

Is there any reason for this other than a convenient point to route the 
ground wire(s)?

Any thoughts????

Gene, W?QFC
Spring Hill FL 

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