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Delta Loop antenna

 

 

PA1HR's DeltaLoop antenna

 

This DeltaLoop antenna has a length of 125 meters, divided into three sides of 40, 42 and 43 meters.

The antenna is at a height of 10 meters.

This DeltaLoop let the following results:

10m: a maximum enhancement of 12 dBi at 12 degrees elevation

12m: strengthening a maximum of 13 dBi at 15 degrees elevation

15m: a maximum enhancement of 12 dBi at 16 degrees elevation

17m: a maximum enhancement of 12 dBi at 20 degrees elevation

20m: a maximum enhancement of 10 dBi at 23 degrees elevation

40m: a maximum enhancement of 6 dBi at 39 degrees elevation

80m: a maximum strengthening of 8 dBi at 88 degrees elevation

160m: a maximum enhancement of 2 dBi at 89 degrees elevation

On the high bands, the radiation has a somewhat erratic pattern,

but at 160 and 80 meters the antenna has an almost multi radiation pattern.


The wooden poles are "poles in the bark", similar to very straight trees without branches.

This type of poles is also known as pile.

Below are the poles over 25 and the top is about 15 cm.

The piles are a 1,5 meters in the (sand) ground.


Here is how visible the antenna between the poles is tense.


One of the three poles to which the antenna is mounted.


For the antenna and the open feeder lines the same 2.5 mm2 bronze wire is being used.

Note the strain relief.

The glass Pyrex insulators are 30 cm long, as well as the steel springs.

All other parts are of stainless steel, the katrol is part of plastic.

The nylon cord is 5 mm thick and has a strength of 450 kilos.

The open feeder lines, over a distance of 17 metres from the power supply to the house.


This is the mounting of the open supply lines to the exterior of the house.

Two Pyrex insulators from glass of 9 cm long.

Here again a strain relief.


The same mounting, but from the bottom photographed.


The open feeder lines running across the facade of the house.


The 8 cm plastic spacers are manufactured by the German mark

BS Technic from Durmersheim / Germany, type Nylon Duplo-Clip.

At the front, the spacers a height of 4 cm.

The spreaders are 12 cm long and are carried by www.hfparts.com, type SP-120.

It fits very well in the plastic spacers!

The spread between the two wires of the open supply lines is 11 cm.

The spreaders have a hole in the middle, to make other mountings possible.


Here you can see how the open feeder lines goes around the corner,

to the tiled roof on the side of the house.

The same spacers are being used, but with a height of 6 cm.


A 8 cm plastic spacer screwed down on the side of the house.


The 8 cm plastic spacer on one of the tiles.

The tile is drilled at the highest point (gently!) with a hole of 6 mm.

The tile at the place of the drilling is cleaned with good sandpaper and a brush.

In the drillinghole, a 6 mm plug on the brand Fischer type SX.

Between the tile and the spacers is Bison Professional Polymax being used.

The spacer is then fixed with a 4.5 mm stainless steel on the tile.


The open feeder lines stretched tightly over the tiled roofs.

The feeder lines I have mounted as low as possible on the roof for the following reasons:

- Easy for maintenance

- Leaves and snow can easily be removed

- The feeder lines leading into the house (see photo below)


It is clear to see how the open feeder lines enters a ventilation tile with three openings.


 

The open feeder lines passes through the ventilation tile.

 

The results of this antenna are extremely good.

About horizontal loops is very much written in books, magazines and on the Internet.

See, for example, the following site:

http://srgproperties.inetusanow.net/files_custom/9467_2192.pdf


For questions about this antenna installation, you can call me at 3,630 kHz.

When I don't answer, please send me a message.

 

 
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