[Elecraft] (K3) SWR Consistent - low or high power

[riese-k3djc at juno.com]

WOW  

Bob K3DJC


On Wed, 10 Oct 2012 20:32:58 -0400 Don Wilhelm <w3fpr at embarqmail.com>
writes:
> Randy,
> 
> What you say is true only if working into a load that is not 
> frequency 
> selective - like a dummy load.
> If working into an antenna, that will be frequency selective and any 
> 
> harmonics will increase the SWR indication.
> 
> 73,
> Don W3FPR
> 
> On 10/10/2012 8:17 PM, Randy Farmer wrote:
> > It's pretty unlikely you'd see harmonic content on any kind of 
> broadband
> > power sensor like a SWR meter. Even if the transmitter was really 
> bad
> > and had harmonic levels only 40 dB down, this would mean for 100 
> Watts
> > output you would be getting 10 mW in harmonic energy, which 
> wouldn't
> > wiggle anybody's meter very much. And if the total harmonic power 
> at 40
> > dB down was just equal to the reflected power from your antenna
> > mismatch, this would mean the antenna would have a VSWR of 1.07. 
> My
> > money's on diode nonlinearities at low power levels.
> >
> >
> 
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