On Thursday, it was raining pretty steady here, not a downpour, but just a solid, steady rain. I was surprised as RTV remained constant at 70-71% all the while. That being with a Coolsat 5K and a 1.2 M dish.
I am in Ontario and I too noticed a slight increase in quality for RTV.
Late Friday and all Saturday we had rain and more rain. At one point on Friday night I had almost no signal on anything. Come Sunday morning, all was fine and thats when I noticed that RTV was coming in at a steady 70%.
With a 90cm dish and a Coolsat 5000, I usually have a pixelated picture at about 66%.
Yesterday I aimed my primestar dish to get RTN. With the fortec NA I get a quality of around 53-59. While I was messing around I aimed my BUD there also and am getting the same quality with it. I guess the shows how good the primestar is or how bad my BUD is!
Mesh dishes will loose more than solid dishes. It's all about surface accuracy with ku. Smaller offset's perform better then a solid or spun c band dish unless it is fitted with an LNBF designed for a prime focus dish.
It's about a 6 foot mesh dish. I bought it for c-band about 20 years age and have since added a C/KU lnb. I'm thinking about where to us it for C-band as I get no advantage on KU over the primestar dish.
I am more and more impresed with the Primestar dish the more I use it. It is easy to aim, I like the skew adjustment scale, and it gets a good signal.