[AMPS] Shunt regulated high voltage psu

[Ian White, G3SEK]

Radio WC6W wrote:
>
>On Mon, 28 Jan 2002 14:31:06 +0000 "Ian White, G3SEK" <G3SEK@ifwtech.com>
>writes:
>
><snip>
>
>> When everything is up and running, I suppose it would be possible to
>> ift the screen supply to a large resistor connected from the B+...  but
>
>> I'd never feel easy about it, and certainly wouldn't recommend anyone
>> else to do that.
>
>  I've been running my 4CX1500B like that for... 15 years.  The low end
>of the plate supply bleed (50K from 3 KV) is the screen voltage source.
>I also have a 350V SCR crowbar, in the plate supply at the low end of the
>bleed, in case something goes awry with the screen regulator or the wires
>between the plate and screen supply.  Works fine and the crowbar has
>never crowed... except for test.
>
Thanks, Marv - I'm pleased to learn it can be done reliably. Is this 
with an active regulator or with zeners?

-- 
73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                           'In Practice' columnist for RadCom (RSGB)
                            http://www.ifwtech.com/g3sek

--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com