NZ Sourced Dish

A recent withdrawal from the satellite TV scene has left a significant number of off-set dishes surplus on the NZ market. Available are 640 mm, 840 mm and 1-metre dishes. These are set up for satellite TV work with a holder for the standard masthead unit and adjustable clamp.

Gain figures are not immediately available however the 640 mm unit is the same size as another unit with a claimed linear polarized gain of 24 dBi.

The 640 mm and 840 mm dishes are relatively inexpensive at around $55 and $85 respectively however the 1 metre dish is closer to $300.

With the large number available someone may be able to source and supply these at better prices.

The unit displayed is the TD64 or 640 mm offset unit available ex-stock from Teltrac in Christchurch. The aerials may appear on the 2.4 GHz wireless LAN systems and may find a wide market there limiting any price reductions on the surplus market.

While final calculations have not been completed, initial estimations of the F/D are around 0.6. For best performance it is recommended that a 4.25 turn left-hand Helix be used for AO-40 operation.

It is also recommended that the Helix is mounted in a suitable can (100 x 50 mm) which enhances the gain and limits interference from side lobe reception. A further limitation of off-set dishes is the ground noise received by the feed. Take care in designing & mounting the feed antenna.

Models available:        TD64       640 inch Off-set Dish with mounting

                                  TD88       880 inch Off-set dish with mounting

This information is supplied strictly as a service to members and is not a paid advertisement neither is it a recommendation. These units should be available in your local area.

Contact Details: Maritus Roos, Teltrac, 22 Alloy Street, Christchurch.  Ph 0800 TELTRAC
Email; mroos@teltrac.co.nz