Amps
[Top] [All Lists]

[AMPS] parasitic suppressors

To: <amps@contesting.com>
Subject: [AMPS] parasitic suppressors
From: Peter_Chadwick@mitel.com (Peter Chadwick)
Date: Thu, 8 Apr 1999 09:11:25 +0100
Rich says:

        > how come all PA's don't show spurious non harmonically related
        >>outputs?
> >
>?  HF PAs do. 


Not this side of the pond, they don't - unless the design is crap and they
are oscillating. Nor in the ARRL lab reports published in QST. 

> One can put a conductance of10mSiemens in parallel with a susceptance
>  
And it's still a conductance 10mS or a resistance of 100ohms. The only way
to  increase the resistance (or decrease the conductance) is to put a
negative conductance in parallel. Since negative conductances require active
devices, it doesn'r apply. Mind you, if you can find a passive negative
conductance, your fortune is made...........you won't need PG & E.

>>Rubbish! That's the definition of admittance - the reciprocal of impedance
> >
>?  Try it.  Take heed that ye beware of the snare.  

No snare if you do your sums right.

73

Peter G3RZP



--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


<Prev in Thread] Current Thread [Next in Thread>