[Amps] Has anyone ever actually build an 833A linear?

[Gary Schafer]

You will need a push pull type of grid circuit in order to neutralize them.
The bridge type circuit will not work well.
If you just swamp the grids with a resistor and use a step up transformer it
will take more drive than it is worth.

73
Gary  K4FMX

> -----Original Message-----
> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Mike Waters
> Sent: Tuesday, December 18, 2012 4:24 PM
> To: amps at contesting.com
> Subject: Re: [Amps] Has anyone ever actually build an 833A linear?
> 
> Well, two grid-driven 833Cs in parallel may or may not be as linear as
> the
> best expensive ceramic triodes in G-G. But if it's linear enough not to
> make my signal much wider, it's good enough for me. If it generates bad
> key
> clicks and spurs, then I'll build another one with the GS-35B I have,
> and
> say we learned something.
> 
> I plan on swamping the grids, and probably using a broadband step-up
> transformer to get the grid voltage needed with 100w drive. With a
> string
> of 18v 10w zeners for grid (not cathode) bias. I already have all those
> components; why not breadboard something and try?
> 
> 73, Mike
> www.w0btu.com
> 
> On Mon, Dec 17, 2012 at 4:58 PM, Carl <km1h at jeremy.mv.com> wrote:
> 
> > Its not a very linear tube for SSB, great for AM.
> >
> > Carl
> > KM1H
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