Standing waves on the antenna are necessary for it to radiate. They are not
necessary to transfer power from the plate of the tube.
I hope that Bill Orr book arrives soon.
73
Gary K4FMX
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On Behalf Of Bill, W6WRT
> Sent: Wednesday, April 07, 2010 9:36 PM
> To: Amps reflector
> Subject: Re: [Amps] Hmmmm...Legal limit boiled the oil in the cantena
>
> ORIGINAL MESSAGE:
>
> On Wed, 7 Apr 2010 15:39:03 -0400, "Gary Schafer"
> <garyschafer@comcast.net> wrote:
>
> >Reflected power reaching the tube plate, not likely.
>
> REPLY:
>
> Not so. With the antenna connected directly to the plate (or through a
> DC blocking capacitor) I guarantee you there will be some reflected
> power returning back to the plate. Why? Even a perfectly resonant
> antenna does not radiate 100% of the power fed to it on each half
> cycle. Some power is reflected back from the end of the antenna to the
> feed point (plate of the tube) where it combines with the next half
> cycle. Antennas 101.
>
> The only exception would be an infinitely long antenna, and you are
> not likely to ever see one of those, especially mobile. :-)
>
> However, that reflected power does not contribute to SWR if there is
> literally no transmission line. It's just reflected power.
>
> 73, Bill W6WRT
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