AOR DIRECT
DA5000 - discone aerial for professional applications
The DA5000 is a professionally constructed 'compact' discone aerial for the upper UHF frequency range of 700MHz to 3GHz (3,000MHz). The top section comprises of 16 horizontal elements and the lower section has eight radials mounted on a solid stub terminated in a N-type socket.
DA5000 PROFESSIONAL UHF DISCONE The construction is largely of brass (BsBM) accounting for its weight of 700g, it is finished in a military grey colour. The overall length from the top elements to the N-socket is about 240mm with the overall top diameter being 82mm and each radial 100mm long.

Termination is via a N-socket which is housed within the stub-mast to keep adverse weather out. Use of quality 50 OHM coaxial cable is essential, at least URM67 / RG213 for short lengths and even better quality for longer cable runs.

Avoid touching the horizontal elements, improper handling of the horizontal elements will degrade the aerial's performance. Due to the exacting method of construction, it is not possible to replace components which are mishandled and accidentally damaged by the customer.

The DA5000 is supplied with an aluminium stub-mast of 32mm diameter and 400mm in length, clamps to secure the aerial / stub-mast / support pole (support pole not included), 'V' brackets are also included which accept a support pole of 25mm - 50mm diameter.
Warning
Sensible precautions must be taken while assembling & erecting the aerial in order to prevent any accident or damage to personnel or property. It is recommended that the aerial is regularly inspected for loose nuts and bolts. Make sure that the aerial remains stable all the times. Do not use the aerial for non-intended purposes other than receiving radio signals.

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Specification
  • Frequency coverage 700MHz - 3GHz (3,000MHz)
  • Aerial gain (max) 2.5dB (see plot) vertical omni-directional
  • Impedance 50 OHM
  • Termination N-socket, female
  • Horizontal elements 16, overall top diameter 82mm
  • Radials 8, 100mm long, overall outer diameter 145mm
  • Overall height 240mm
  • Wind resistance up to 40m/S (theoretical)
  • Stub-mast 32mm diameter, 400mm long
  • Support pole size 25mm - 50mm (not included)
  • Coaxial cable Use low loss (not supplied)

Note, all measurements and weight are approximate.  
Not intended for transmit.

 

 DA5000 DISCONE - SIZE
DA5000 FREQUENCY PLOT

Parts supplied - quantity

  • DA5000 aerial - 1
  • Stub-mast with large securing bolt and split washer - 1
  • Support clamp with two 
    small bolts - 2
  • 'V' brackets with four washers 
    & nuts - 2
  • Instruction manual - 1

Operating manual / leaflet

Downloads available in Acrobat PDF format:

What is a discone:  For wide coverage in the VHF-UHF bands a compromise has to be met and the most popular aerial is a discone (a disk of elements over a cone of elements). Their appearance is like a large spider or umbrella without the covering material, the better models have about 12 to 16 elements... avoid discones with only a few elements (such as six). Typical usable coverage starts from about 25 MHz and extends continuously to 500 MHz, 1300 MHz or even 3000 MHz. The coverage peaks and dips throughout it’s range as the elements interact to provide the widest possible coverage. Due to their necessary construction discone aerials are a little prone to "wind noise" & possible damage in severe gales.

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