Re: AT3032 matching & Telinga questions

["John Tudor" jtudor2005]

Measure the diametre of the dish.
Lay a ruler across the dish and measure the depth in the centre

The formula for finding the focus of a Parabloa is as follows

(Dia Squared)/(4 x Depth)

Example. Dish is 1200mm in dia (1200 Squared is 1,440,000)

Depth is 600 mm deep at the centre (4 X 600 =3D 2,400)

1,440,000 / 2400 =3D 600

So the focus is 600 mm out from the centre

Fine tune it from there