Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ?

[Bill Fuqua <wlfuqu00@uky.edu>]

IMD is caused by the odd order terms of the polynomial ( output 
voltage/input voltage) of a device. The harmonics of these can terms ( 3rd, 
5th etc harmonics) can easily be filtered but the near by IMD products 
cannot since they are KHz or less from each other. Many think IMD is due to 
frequency mixing of harmonics but it is not, the additional frequencies are 
created in the device with out the aid of harmonics. If you are interested 
in the math behind IMD and harmonic distortion and frequency mixing ( 
algebra and trig.) I can attach to an email notes that one of my students 
put together from one of my classes. It is rather large for some reason 
because I could not get it published to PDF without going to total bit map.

73
Bill wa4lav


At 01:12 AM 1/2/2004 +0100, you wrote:

> ----- Original Message -----
> From: "Bill Fuqua" <wlfuqu00@uky.edu>
> To: <bill@wjschmidt.com>; "AMPS" <amps@contesting.com>
> Sent: Friday, January 02, 2004 12:00 AM
> Subject: Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ?
>
>
> > At 04:50 PM 1/1/2004 -0600, Dr. William J. Schmidt, II wrote:
> > >Class A has less little IMD, class B has a lot.  C would be really nasty
> > >if not
> > >for output filtering (good tank circuit)
> >
> > C will have lots of IMD regardless of tank circuit. The tank circuit only
> > eleminates
> > harmonics.
>
>  ** not only eleminates ( most of ) harmonics, when cleaning up up the sine
> ( RF ) as a f(Q ) of the tank.
>      I always believed  IMD was included !  What am I missing Bill ?
>
> Hpy 2004 to all.
>
> jos on4kj
>
> f> 73
> > Bill wa4lav
> >
> >
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
> >

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