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Topband: Phased TX3A Double Half-Delta Loop and Beverage

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Subject: Topband: Phased TX3A Double Half-Delta Loop and Beverage
From: "Ryszard Tymkiewicz" <rtym@ippt.gov.pl>
Date: Wed, 27 Jan 2010 14:16:54 +0100
List-post: <topband@contesting.com">mailto:topband@contesting.com>
Hi All,
Beeing inspired by  an article written by Luis IV3PRK  
http://www.iv3prk.it/user/image/..-rxant.prk_tx3a.pdf
(Thanks Luis!) I'v decided to build Double Delta Loop used by George on 
Chesterfield in a broadside
configuration. Because of TX3D Australs DXpedition I'v made 250m Beverage in 
their direction
and and just a week ago I'v builded also this described Delta system.
I was trying both antennas in my second QTH 45 km from my house (its an 
orchard) yesterday but
Deltas was not working and on Beverage TX3D was too weak. When I checked I 
discovered that one
of wire in a delta was broken , so practically today was the first day I was 
able to compare antennas.
When I started to listening on Deltas in the first minutes I'v thought they are 
broken again because 
there was almost not any noise in a RX...but checking the band I'v found a lot 
of strong NA stations with 
very clean signals . I tested Deltas with the Beverage many times and always a 
difference was huge.
Even a strenght of stations was about 2S better on the Beverage the difference 
in the level of noise was 
not comparable...it was like day and night.
Using the Beverage I haven't heard even a trace of TX3D....on Deltas I'v heard 
them about 20 minutes
....but with deep QSB.

                                            73 Rys
                                           SP5EWY







_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK

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