[Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ?

[GGLL]

I've been following this nice discussion, and want to ask something 
about Ian's post, ¿what's bad with running exciter at a lower level and 
to have the amplifier "seriously under-driven"? (it seems to be not only 
a lower power output matter).
My modest guess is something related with operating points due to  
distortion considerations, is it?.

Many thanks and have all a prosperous 2004
Guillermo - LU8EYW.

Ian White, G3SEK wrote:

> R. Measures wrote:
>
>> **  The grid does not and can not draw current when a competent 
>> operator sets the grid potential just above the level where it can 
>> draw grid-current with the max PEP drive that's available.
>
>
> That is only true if the grid input circuit is guaranteed to be able 
> to soak up all possible levels of drive without allowing grid 
> current... but that also has disadvantages: either the exciter runs 
> flat-out and generates unnecessary IMD of its own, or else the exciter 
> runs at a lower level and the amplifier is seriously under-driven.
>
> I truly cannot see why anyone should design (or defend) a 
> high-impedance bias supply whose voltage regulation will collapse at 
> the first trace of either normal or negative grid current. What's the 
> point, when a better-regulated supply is just as easy?
>
>