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20m 17m two band DESpole rotating dipole

ManufacturerInnovAntennas
Availability:in stock 1000 item(s)
Product Code:14-18-DES-2

Product Dimensions and Weight

Product Length: 5.5000M
Product Width: 5.0000M
Product Weight: 10.0000LB
Sales price £223.96
Price / kg:

Prices 20% less for customers outside of EU

A 2 element Low-Loss rotating dipole for 20m/17m
 
Why Low-Loss? Your existing multi-band Rotating dipole just might have a large amount of NEGATIVE GAIN. Read on for more details
 
G0KSC has become well-known for his very different and innovative designs which always look to achieve maximum radiating efficiency without matching devices, traps, coils or other 'power-sapping' devices used in multi-band antennas. The DESpole is no different in this regard as it has an individual full-sized element for each band and the ends of the longest elements are turned down towards ground (see below photo) in order to achieve a smaller turning circle. The result is a practical, very efficientHF rotating dipole suitable for all locations.
 
So if you are happy with your current multi-band vertical or rotating dipole, just think how happy you will be with a Low-Loss, highly efficient DESpole!
 
The DES-Dipole is typically supplied in 2 or 3 band versions of which there are a number of variants. However, if you do not see a band combination you would like, mail us as it might be just around the corner!
 
More information on how the DES-dipole is better than the rest can be found HERE

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3 band DESpole pictured

Performance

Gain 15m above average Ground:

7.26dBi @ 20 degrees (14.2MHz)

6.98dBi @ 16 degrees (18.1MHz)

Power Rating: 5kw+

SWR:

Below 1.4:1 from 14.00MHz to 14.35MHz

Below 1.4:1 from 18.00MHz to 18.20MHz

Stacking Distance: 5.0-8.0m ( 6.5m recommended)

Turning Circle/Longest element: 3.2/6.34m

Down-facing element: 1.88m

Weight: 8KG / 17.5LB

Wind Loading: 0.20 Square Metres / 2.16 Square feet

Wind Survival: 163KPH / 101MPH

Other options available if higher wind loading/survival is required.

 

Specification

The 20m section has 3 tapers starting at 32.1mm (1.25') and finishing at 9.525mm (3/8'') while the 17m element has three sections, the centre being 22.25mm (7/8'') with 9.525mm (3/8'') tips. All elements are insulated and stainless steel hardware is used throughout.

OTHER TAPER SCHEDULES ARE AVAILABLE IN THIS ANTENNA, CALL OR EMAIL FOR DETAILS

Our antennas are constructed with the best quality materials in order that the best mechanical construction can be achieved, not the cheapest and most profitable! Even a digital caliper is used (with an accuracy of .01mm) to measure the elements during production to ensure they are within 0.2mm  (on critical bands) of what they should be, this ensures they work as well as our software model predicts.

Note: Much development time has gone into our antennas, not just on basic electromagnetic design, we are able to model the effect of insulators, booms and other objects to ensure the make up of our antennas have least effect on performance and pattern degradation. More information can be found here

  • Marine grade Stainless Steel Fittings
  • Original Stauff Insulation clamps
  • Mill finished boom and elements for highest levels of accuracy

 

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The above photos shows a 3 element DES-dipole centre and the very high standard to which it is made.

 

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The DES-dipole Antenna Layout

 

Manufactured the right way, not the cheapest way