[Prev][Next][Index][Thread]
1/4 Wave Theories - Trash Them!
----------
From: Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Wednesday, June 10, 1998 9:15 PM
To: Tesla List
Subject: Re: 1/4 Wave Theories - Trash Them!
Hi Bart,
> From: Barton B. Anderson [SMTP:mopar-at-uswest-dot-net]
> Sent: Tuesday, June 09, 1998 1:34 AM
> To: Tesla List
> Subject: Re: 1/4 Wave Theories - Trash Them!
<snip>
> When I said above "a net reactance", I was talking about the
> situation when XL=XC. Because both are opposing and opposite, these
> reactances cancel. If XL = 24ohms, then Xc = 24ohms (at resonance),
> but, if they are opposing and opposite (of which we know this is
> true) isn't this net reactance "0"? and all that would remain is
> the dc resistance of the coil?
The effective AC resistance which incorporates extra resistance due
to skin and proximity effects, radiation losses, ground losses if one
includes ground as part of the resonator, stray coupling to other
objects..... The ESR of a coil will always be higher than its DC
resistance.
Malcolm
<snip>