Tivù said:After all this dosh you've shelled out already, you might as well get yourself a Meter!
Tivù said:You can't beat a spot of mounting in the evening.
We'll all be behind you ..................
Huevos said:I'm going to post this here because it could be relevant.
I went to a job today. The guy had changed from a Sharp single LNB with a built in feedhorn to an Invacom twin and one of those adjustable feedhorns. Signal was miles down on what it should have been and miles down on the Sharp so obviously an LNB related problem. Anyway after trying a couple of new LNBs and the problem still persisting I changed the feedhorn to the one everyone here uses, and bingo normal signal level appeared. Anyway physically comparing the adjustable feedhorn to the one that cured the problem the bore is completely different and the scalar ring design is completely different. I put the adjustable back on and tried again (as per the instructions and in various other positions) but I wasn't clever enough to get it to perform anywhere near the way a regular one performs. Dish was a 1.8m and with that feedhorn Astra 2D reception was impossible. With the regular feedhorn I was getting 9.6dB MER which is normally good for 24 hour reception except in very heavy rain.
Well I sold my last one today otherwise I would have posted a photo. As soon as I buy some more I will post a photo.garyg said:Any more hints as to what feedhorn you are referring to?
Huevos said:Well I sold my last one today otherwise I would have posted a photo. As soon as I buy some more I will post a photo.
Tivù said:A bit more re-engineering and you will have a vast array of different sized Umbrellae to hand.
Well it was doing a good job attenating Astra 2D, and yes the bore is quite a bit smaller.Robbo said:The bore of the feedhorn will determine the frequencies that pass down it, too small, and it will filter off the lower frequencies very very well. Waveguides are almost perfect low pass filters.