A TV Satellite Dish Restoration Project

A simple restoration project shows how I tried to improve the efficiency of two, large, decades-old, satellite dishes. Hoping to receive weak UK channels which had been lost to my smaller dish with the retirement of the Astra 2D TV satellite. I hope there is enough information here to inspire others to try. UK fringe reception is still very limited to a randomly variable number of hours. Nextflix.dk has helped to fill the empty evenings and has improved its service and subtitling over time.

Sunday, 4 May 2014

[P15] Kathrein 2.2m Dish parameters.

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The Kathrein dish measures 220cm in diameter [D ] from edge to edge of the active concave surface.

The depth [d] to the centre of the dish, measured from a tightly stretched cord, is 40cm.

The front edge of the feedhorn throat, of the original LNB, is 75cm from the dish surface.

Theoretical focus is D^2 / 16d = 220 x 220 / 16 x 40 = 48400 / 640 = 75.6cm

Focal ratio = 75.6 / 220 cm = .34

Here is a fascinating 1986 Kathrein promotional video on YouTube:

A TV Satellite Dish Restoration Project

Sunday, 4 May 2014

[P15] Kathrein 2.2m Dish parameters.

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