[Amps] Load Pulling

[d.cutter at ntlworld.com]

Used to do something like this in the 70's at microwave.

David
G3UNA

> 
> From: Bill Fuqua <wlfuqu00 at uky.edu>
> Date: 2007/09/12 Wed PM 02:33:00 BST
> To: bumerang boom <bumerang.boom at yahoo.com>, 
> 	"amps at contesting.com" <amps at contesting.com>
> Subject: Re: [Amps] Load Pulling
> 
> 20ns x 70 =1400 ns
> every 500 ns?
> 
> Seems to me that the easiest way would be to
> construct a tuner and a 50 ohm dummy load with
> a thermometer.
> 
> Tune for max dummy load temp. and then measure the impedance of the
> tuner-dummy-dummy load.
> Change the sign of the j ( imaginary) component and you have it.
> 
> 
> 
> 
> 
> At 06:44 AM 9/12/2007 -0400, bumerang boom wrote:
> >Hello, one and all.
> >I need to characterize the output an unusual AMP. It
> >outputs a 20nS 70Square pulse every 500nS.
> >I would like to measure it's output complex impedance
> >but
> >I  am not sure if the usual equipment like an antenna
> >tuner and a SWR meter will indicate correct values.
> >
> >Can any one help with ideas in the test bed
> >construction?
> >Any help will be greatly appreciated.
> >
> >N2NNU
> >
> >
> >
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