You might make a series regulator with one of these FET's controlled by a
LM317. A foldback limiter is mandatory.
or for a bit more headroom
A small (10 mA?) bleed should be sufficient.
A crowbar with a suitable SCR to protect the tube & socket is nice extra.
73 & Happy New Year,
> > ----- Original Message -----
> > From: Hsu
> > To: firstname.lastname@example.org
> > Cc: email@example.com
> > Sent: Sunday, January 01, 2012 10:43 PM
> > Subject: [rfamplifiers] 4CX5000/10000
> Screen power supply help needed
> > Happy newyear to everybody!
> > I have no experience on building over 2kW
> amplifier.I'll try this project
> > this year.
> > I just get a brand new socket and will
> oredr some parts after new year.
> > I think the regulated screen supply to
> mess with too.
> > I study DC9DZ 4CX10000D amplifier
> > DC9DZ use expensive high power and rare
> zener diode in serial as screen
> > shunt regulator power supply ,
> > but I think it is expensive and poor
> dynamic spec and bad IM3.
> > I think the screen power supply based on
> G3SEK's design is the best, but as
> > 4CX10000D and 4CX5000's sceeen
> > PS is difficult , too much power and too
> high voltage , even parallel and
> > serial over 10 MOSFETs. Any suggestion?
> > 73!Hsu
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