co rotor II

rainman · #1 (**permalink**) 07-19-2006, 07:42 PM

just talked the wife into a new chaparral co rotor II for my birthday next month. now for christmas see if we can talk her into a couple norsat lnb's.

rainman · #2 (**permalink**) 01-02-2007, 09:09 PM

got the norsats on the way should be here next week. have to say got a great wife to put up with my hobbie.

wejones · #3 (**permalink**) 01-03-2007, 09:36 AM

Quote:

Originally Posted by rainman

got the norsats on the way should be here next week. have to say got a great wife to put up with my hobbie.

What type Norsats did you get? Those things vary in price from under $100 to up around $1000. Last time I replaced an NLB, I replaced a CalAmp lnb with a Norsat. My goal was to reduce the freq drift. My CalAmp tended to drift about 1.5 MHz at times. The Norsat I got, which was one of their cheaper lnbs, was one rated for about 0.75 MHz drift, and it has performed as advertised drift wise.
Other than the drift though, I think my CalAmp was actually a bit better relative to sensitivity, and the Norsat seems a bit better relative to noise, although that's probably because my CalAmp was pretty old. But I got the impression that maybe Norsats didn't have quite as much gain as CalAmps in order to get better noise figures. Overall though I've been pretty happy with my Norsat. It locks much faster on DCII signals. If you got one of the more expensive ones, I'd be interested in what you think of it.

rainman · #4 (**permalink**) 01-03-2007, 10:15 AM

Bill I got the 8515 c band and the 4506A ku band they have 500 khz stability.

wejones · #5 (**permalink**) 01-03-2007, 11:23 AM

Quote:

Originally Posted by rainman

Bill I got the 8515 c band and the 4506A ku band they have 500 khz stability.

Neat. THose sound better than what I have. I think I have the 7706A, which is only 750 KHz stability. (I only have Norsat on Ku)

rainman · #6 (**permalink**) 01-03-2007, 11:33 AM

Quote:

Originally Posted by wejones

Neat. THose sound better than what I have. I think I have the 7706A, which is only 750 KHz stability. (I only have Norsat on Ku)

that would be the 2707A Bill for 750khz.

wejones · #7 (**permalink**) 01-03-2007, 11:55 AM

Quote:

Originally Posted by rainman

that would be the 2707A Bill for 750khz.

2707A must be a newer model. Mine is definately the 7706A, which is +/- 750 KHz and NF 0.6 gain 60 DB . ( I just pulled out the box it came in. )

A while back I tried going to the Norsat web page to look up the specs, and I couldn't find my LNB, even though I bought it not that long ago (within the last 2 years anyway). I bought it from a respected dealer, but I'm guessing that he had a stock of older LNBs. He gave me several to choose from, and I chose one of the cheaper ones, which apparently was an older one.

In looking for specs, I did find a PDF file for the 4000 series, which explained the part numbers. Apparently the "06" in mine refers to the noise figure, the "A" refers to the frequency range, the first "7" refers to the series number, and the second "7" refers to the stability. However the stability chart on the pdf file didn't go up to "7". It had "1"=150, "2"=250, and "5"=500, so I'd have to assume that "7" was 750.
From this chart, the 2707A would also be 750 KHz, but would have 0.7 noise figure, and would be a series 2000 lnb.

rainman · #8 (**permalink**) 01-03-2007, 12:47 PM

Quote:

Originally Posted by wejones

2707A must be a newer model. Mine is definately the 7706A, which is +/- 750 KHz and NF 0.6 gain 60 DB . ( I just pulled out the box it came in. )

A while back I tried going to the Norsat web page to look up the specs, and I couldn't find my LNB, even though I bought it not that long ago (within the last 2 years anyway). I bought it from a respected dealer, but I'm guessing that he had a stock of older LNBs. He gave me several to choose from, and I chose one of the cheaper ones, which apparently was an older one.

In looking for specs, I did find a PDF file for the 4000 series, which explained the part numbers. Apparently the "06" in mine refers to the noise figure, the "A" refers to the frequency range, the first "7" refers to the series number, and the second "7" refers to the stability. However the stability chart on the pdf file didn't go up to "7". It had "1"=150, "2"=250, and "5"=500, so I'd have to assume that "7" was 750.
From this chart, the 2707A would also be 750 KHz, but would have 0.7 noise figure, and would be a series 2000 lnb.

yeah i seen that chart Bill just never saw the 7706a but makes sense the way it's coded.

rainman · #9 (**permalink**) 01-06-2007, 06:40 PM

got the lnb's friday got them installed on the feedhorn today hopefully tomorrow weather will be nice enough to install on the dish.man the norsat c band lnb's are huge if size has anything to do with it should be getting martian tv.LOL

rainman · #10 (**permalink**) 01-07-2007, 07:17 PM

no ludk on the install today it has rained all day maybe next weekend.