On Jan 26, 2006, at 7:30 AM, Xmitters@aol.com wrote:
> Hello:
>
> I'm new to this list and this is my first posting.
>
> I do a great deal of circuit analysis for broadcast and communications
> transmitter circuits and I would like to find either models, or the
> algorithm for
> creating models for power grid tubes. The audio sector has done a
> great job with
> models for audio, but invariably, those models do not include modeling
> of the
> grid current and screen current. These parameters are important in
> class B
> and class C.
>
> Also I am in need for a set of constant current curves for the 4-400A.
> The
> only curve given on my Eimac data sheet is for 500 volts. I need
> curves for
> other screen voltages; maybe these extra data exists, maybe it doesn't.
The curves for 500v may be converted to other voltages by applying the
3/2 power law.
> This
> information is going to be used in the design of a screen impedance
> modulated form
> of the Doherty amplifier. This is used in the Continental Electronics
> 317C-3
> 50 kW AM transmitter if you're familiar with that. This system I'm
> designing is
> going to be for the 160 meter ham band. I think a pair of 4-400A
> tetrodes
> will work well in such a circuit :-)
>
> Thanks for your help :-)
>
> Jeff Glass, BSEE CSRE
> Northern Illinois University
> WB9ETG since 1970
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|