[AMPS] Re: Ferrite Rod for 6M Amp

[Gilmer, Mike]

There seems to be a lot of "going around" on this Ferrite Rod thread
(but you KNEW that!). Pardon what may be stupid questions - I'm a
hardware guy who's gone "soft" :o)  I'll jump in anyway, and maybe learn
something.

> >People who aren't totally familiar with PA operation sometimes  
> >confuse harmonic distortion with the type of distortion that causes 
> >splatter. Splatter is NOT caused by harmonic distortion, splatter is 
> >caused by amplitude non-linearity in the envelope shape.   
> >
> Is this a plea-bargain?
> 

Is not amplitude non-linearity in the envelope of the RF actually
(usually?) harmonic distortion in the AUDIO?  This is splatter, right?
Perhaps two-tone type stuff in the not-so-linear (on purpose or
otherwise) parts of the transmitter can contribute, too, but the audio
is where we tend to create splatter.

> >> ?  Harmonic distortion has everything to do with sine waveshape 
> >> distortion.  
> >
> >That's right. But harmonic distortion has no ill effects in a narrow 
> >band PA. 
> >
> It does when your neighbors are watching the NBA playoffs.  
> 

Harmonics content in the RF are not and do not cause "splatter".

However, harmonics of the RF do make it out the connector (albeit
30-40dB down) and into the antenna and get radiated, even though the PA
and the antenna are "narrow-band".

Has this discussion split hairs regarding what constitutes "harmonic
distortion"?  Is there better terminology for the conditions being
described here?

Now that I've jumped in, am I all wet?

Regards to all,
Mike N2MG



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