Use of 120cm SAB dish and POTY

[pa2eon]

All .. many thanks .. for the quick reply's !
I have to study now a lot .. many thanks again ... I will inform the forum, when I have received the first signals from QO-100 =;)
Regards, Eric - PA2EON

[g0mjw]

Is focal distance similarly critical to signal strength with prime focus dishes? (I suspect a yes is the answer, but suspicion doesn't add knowledge ) Thanks.

Yes, and it is more critical for dishes with a lower F/D (i.e the deeper ones) which prime focus dishes often are.

Mike

[RimaNTSS]

I am coming from satellite TV hobby, and from there I know for sure that the feed placement exactly in antenna's focal point is the best possible option. Any misplacement leads to worsening of the overall performance of the system.

[Basil]

Is focal distance similarly critical to signal strength with prime focus dishes? (I suspect a yes is the answer, but suspicion doesn't add knowledge ) Thanks.

Yes, and it is more critical for dishes with a lower F/D (i.e the deeper ones) which prime focus dishes often are.

Mike

Thanks Mike.