[Amps] PSU design question

[Ron Youvan]

>     I float B- above ground with roughly 125 ohms of R, in one case 
> (separate PSU & RF deck) with 2 separate 250 ohm 25w Rs, one in each 
> chassis, as well as a 1N5408 & .01 3kv cap on each side as well a la Lunar 
> Link.

   I have never seen this and I do not understand a reason for this practice with one exception, 
that being where a tube element is grounded and that element needs monitored and protected, such as 
a klystron where the "body" (cavities) are grounded but must not have more than 100 mA of current.
   I am not sure if this design isn't providing grid bias inadvertently in some amplifier designs, 
bias that might vary for varying plate current.
   I can't recall what a "la Lunar Link" is, I don't know if I ever heard of it.
-- 
    Ron  KA4INM - Remember, the government cannot give anything to anyone
                   that they have not first taken away from someone else.  (like you and me)