- - the whip

- But are you really grounding it; or have you made a dipole?
- /b
http://groups.yahoo.com/group/Shortw.../message/15644

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-

The Radio's Whip Antenna
http://groups.yahoo.com/group/Shortw.../message/15647
* Just What Is It ?
* Making It Work Better !

The Headphone's Lead and the Whip Antenna may be viewed
as a Dipole {Hertz} Antenna of sorts : Since they would
be of 'about' Equal Length.
http://en.wikipedia.org/wiki/Dipole_antenna

Back to the Radio and it's Whip {Marconi} Antenna
http://en.wikipedia.org/wiki/Whip_antenna
http://www.ycars.org/EFRA/Module%20C/AntVert.htm
The Whip Antenna is the Antenna Element and the combined
Electrical Circuity of the Radio is the Counterpoise
{Ground Plane}. Clearly the Whip Antenna is a much better
Antenna Element; then the Radio is an effective Ground
Plane. In effect the Radio's Ground Plane is all crumbled
up into a relatively small area.
-Note- This is considering the Radio itself {Stand-A-Lone}
Powered only by Batteries. [No AC]

Using another much Longer Wire with the Radio creates a
very effective Counterpoise to the Radio's Whip Antenna.
-IF- This Long Wire Counterpoise is Used -and- the Radio's
Whip Antenna is Collapsed or Removed -then- Things are
often reversed and the Longer Wire becomes the Antenna
Element and the Radio once again becomes the ineffective
Counterpoise.

Grounding the Radio itself : Grounding the Outer-Ring of
the Radio's Earphone Jack can also improve the Ground /
Counterpoise with respect to the Radio's Whip Antenna;
and thus can often cause an Improvement in the Reception
of the Radio.

ABOUT - Hertz and Marconi Antennas
http://www.electronics-tutorials.com...nna-basics.htm
http://en.wikipedia.org/wiki/Antenna_(radio)
http://www.midnightscience.com/_xtal/00000210.htm
http://hnsa.org/doc/radio/chap20.htm

Other "Observations" of Improved Radio Reception :

* Connecting an AC Power Cord and using AC Power

* Connecting an AC Adapter and using AC Power

* Connecting a Wire to the Radio's Whip Antenna

* Touching the Radio with your Hand

* Putting the Radio on a Metal : Desk Top , Shelf or TV Tray


HOW TO : Building a Simple Basic 'Mini' Dipole Antenna
for most 'portable' AM/FM Shortwave Radios.

Buy an FM Folded Dipole Antenna the type made from
300 Ohm TV Twin Lead.
* Connect an Alligator Clip to one of the Leads of the
FM Folded Dipole Antenna
* Connect Rear-Barrel of an 1/8" Mono-Plug to the 'other'
of the Leads of the FM Folded Dipole Antenna {Remove the
Tip of the 1/8" Mono-Plug}
* Stretch-Out the FM Folded Dipole Antenna in the shape
of a "T" across/near a Window or on an Outside Wall
* Insert the Rear-Barrel-End of an 1/8" Mono-Plug into
the Radio's Headphone Jack
* Attach the Alligator Clip to the End of the Radio's
Collapsed Whip Antenna

IMHO - This 'Mini' Dipole Antenna usually out performs
the Radio's Whip Antenna and is a Easy-to-Use and a
very Transportable "Travel Antenna".

TIP - This is also a Good {In-Door} "Storm" Antenna
when the Weather is bad and you do not want to Risk
Using an Out-Side External Antenna due to Lightning.

the antenna -allows- your radio to be . . .
All It Can Be ! - iane ~ RHF {pomkia}
.
Shortwave Listener (SWL) Antennas Group = http://tinyurl.com/ogvcf
GoTo = http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
The SWL Antenna Discussion Group = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna HELP = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna NEWS = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna INFO = http://tinyurl.com/ogvcf
* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
plus plain old "Mister-Know-It-Alls"; and even those Newbees with
"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
.
The Shortwave Listener's Blessing :
SWL BLESSING = http://tinyurl.com/s2bjm
May You Never Tire of Listening to the Radio and Always
have Strong Signals and Noise Free Reception ~ RHF {ibid}
http://groups.yahoo.com/group/Shortw...a/message/9233
.
Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = Plain Old American-English Translation = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
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On Nov 3, 10:42 am, David wrote:
On Sat, 03 Nov 2007 01:07:35 -0700, RHF
wrote:

- - the whip

This is basically what's happening with a rod antenna:

http://www.uoguelph.ca/~antoon/circ/activant.html

David,

Yes many 'portable' AM/FM Shortwave Radios do incorporate
a DX Switch {RF Pre-Amplifier} which effectively makes their
built-in Whip Antennas an Active Antenna.

The Grundig Satellit 800-M and Eton E1 Radios come to mind.

~ RHF