[TowerTalk] two benefits of postings on Re: Resonance is over rated

[Gary Schafer]

I think that he was referring to the end result of the total circuit. It may
have capacitive and inductive components in it but the capacitive ones will
exhibit a negative reactance and the inductive a positive reactance.
The resulting impedance will be either resistive, if resonant, or it will be
resistive with a capacitive reactance or resistive with an inductive
reactance. It can not have inductive and capacitive reactance together in
the end result.

73
Gary K4FMX

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of Al Williams
> Sent: Sunday, August 09, 2009 5:01 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] two benefits of postings on Re: Resonance is over
> rated
> 
> One benefit of so many postings on this subject is that raises concepts or
> different ways
> of analying the "problem".
> 
> A second benefit is that some postings causes us (me) to review my
> understanding of things that I learned long ago--in this case over 50
> years!
> 
> The following posting states something that is not only incorrect but the
> truth is exactly the opposite. Actually it was probably mistated.  For
> those
> less trained, here is the correction:
> 
> 1. All circuits have both a capacitive and an inductive reactance at the
> same time.  All circuits will have some lead length
> which will result in an inductance, no matter how short the lead.  The
> inductive reactance xl will be  2piFL accordingly.
> Similarly all circuits will have some spacing between components or leads
> resulting in capacitance.  The capacitive
> reactance will be 1/2piFL.  These two reactances can be mathematically
> combined serially or parallel.  I forget if it was
> Norton, Thevinin, etc. who established the series and parallel formulas.
> There will also be a resistance which must also be included
> (or ignored). The resultant equation is (r1+xl)(r2+xc)/r 1+ xl + r2 + xc)
> for a parallel combination.
> 
> 2. The units for the resultant equation is called impedance-- not
> reactance?
> 
> 3. A minor mistatement probably?
> 
> ----- Original Message -----
> From: "W3YY" <w3yy at cox.net>
> To: <towertalk at contesting.com>
> Sent: Friday, August 07, 2009 7:44 PM
> Subject: Re: [TowerTalk] Resonance is over rated
> 
> 
> >
> > Something either has capacitive or inductive reactance, both not both at
> > the
> > same time.
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk