On Aug 10, 3:00 pm, RHF wrote:
Eye-Ear Gauge of your Antennas Signal-to-Noise :
Let Your Ears ans Eyes Decide {Relative Merit}http://groups.yahoo.com/group/Shortw.../message/14222
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Here is a Ear-and-Eyes Measurement of Signal-to-Noise Ratio :
[ Simply using your Radio and Two Antennas ]
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1 - Tune to your Target Signal {Frequency} and Record the S-Meter
Reading and your 'impression' of the relative quality of the Sound
that you are Hearing : Excellent; Very Good; Good; Poor; and Weak.
- - - Do this for Both Antennas.
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2 - Tune-Off that Frequency by 10 kHz and Record the S-Meter
Reading and your 'impression' of the relative Noise that you are
Hearing : Loud-Roar; Roar; Normal Static; Soft-Hiss; and Quite.
- - - Do this for Both Antennas.
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3- Repeat this process for Several Target Signals {Frequencies}
across a Shortwave Band and sort of Average-them-out for that Band.
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4 - Next repeat this process for Several Shortwave Band that
you regularly Listen to.
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NOW - You have your comparison to gauge for yourself the
"Relative Merit" of your Antennas Signal-to-Noise.
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* * * EXAMPLE * * *
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Antenna # 1 - Linear Two-Wire Windom
* Target Signal on 13800 kHz with S-Meter reading of S8 to
S9+10dB and Very Good Audio.
* -10 kHz Down S-Meter reading below S1 and Soft-Hiss.
* +10 kHz Up S-Meter reading below S1 and Soft-Hiss.
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Antenna # 2 - Multi-Element (Rotor Cable) Horizontal Wire
* Target Signal on 13800 kHz with S-Meter reading of S9 to
S9+20dB and Very Good Audio.
* -10 kHz Down S-Meter reading of S4 and Normal Static.
* +10 kHz Up S-Meter reading of S3 and Normal Static.
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Note - Both Antennas use a common TV type 300 Ohm to 75 Ohm
Balun and RG6 Quad Coax Cable.
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FWIW - Antenna # 3 - GreerTech Coax Cable 13 Foot Loop
* Target Signal on 13800 kHz with S-Meter reading of
under S1 to S1 and Fair Audio.
* -10 kHz Down S-Meter reading of under S1 and very Soft-Hiss.
* +10 kHz Up S-Meter reading of under S1 and very Soft-Hiss.
However with the Icom IC-R75 Receiver's Pre-Amp turned "ON"
* Target Signal on 13800 kHz with S-Meter reading of
under S3 to S7 and Fair Audio.
* -10 kHz Down S-Meter reading of S2 and Hiss.
* +10 kHz Up S-Meter reading of S2 and Hiss.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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ALTERNATIVE - Another way of Gauging the relative Noise of
your Two Antennas is to Tune to your Target Signal {Frequency}
about 5-Minutes before it is ending the Shortwave Broadcast
on the Frequency. Record the Before and After Readings and
'impressions.
.
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once again not scientific -but- a good eye-ear gauge - iane ~ RHF
{pomkia}
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* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
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"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
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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
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Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
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Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennenhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
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Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
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de la onda corta para las Antenas de SWLhttp://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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What are the lengths of the horizontal wire and windom you mention,
and how high off the ground are they?

Steve