Archived from groups: alt.video.satellite.mpeg-dvb (
More info?)
Thank you Mike for your scientific insight and especially thank you
for your
caution. Someone took a lot of time setting up the ws babana.com and
it
looked legit to me but on closer review, it appears to be a Vstore
type of marketing. They were prompt at answering my sales questions
but when I
asked a technical question, they have not responded (even though their
ws leads one believe that they have a tech staff). The Vstore type of
marketing is new to me and may just be a ws of sales people, who just
pass the order on to an unknown party.
"Mike Hedgepath" <mhedgepath@hotmail.com> wrote in message news:<2sjEc.936$LL5.111@bignews1.bellsouth.net>...
> First off, I'm no expert. Having said that, I'm at a loss as to why a
> LNB maker or provider would specify a F/D ratio. I was under the impression
> that the F/D ratio is a function of the dish size/shape/type, and refers to
> the ratio of dish diameter to distance between focal point and LNB.
> I use a DSS lnbf on a 84cm elliptical that was originally attached to an
> 18" offset. The main difference other than dish size and shape is the fixed
> distance between the reflective surface of the dish and the lnbf. In theory
> it would seem that a 3' prime focus dish would have a different F/D than
> would a 3' offset dish. If in fact an offset dish is but a section of a
> larger prime focus dish. I would also think that two offset dishes from
> different manufacturers would have the same F/D ratio provided their sizes
> are the same. In the end a difference of .05 in specs equals 1.5" on a 30"
> inch dish. You may not be able to correct for that by moving the LNB in or
> out from the dish in it's mount. Many folks get good results with "rigs"
> that are less than precise. You likely will too.
> Having never heard of babana.com, I went to their site to check it out.
> I'll assume that the claim stating the dish(of unidentified manufacture) is
> of better quality than the Winegard is self-serving advertising. The price
> seems good, but what will shipping costs be? Where is babana.com located?
> What's their phone number? I looked at the web site and couldn't answer
> those questions. No one should have to send an email to get a phone number.
> They may vary well be totally legitimate, but I advise caution.
>
> Good luck
> MH
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