Feed length is based on dish size; where does the parabola focus. Nothing to do with frequency, everything reflects the same. Size of the feed horn isn't always an indicator either. Can depend on a lot of things.
Josh Luthman wrote: > The feedhorn specifically. Maybe the length will help you too. I know with > higher gain the 5GHz grids are noticeably longer. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "When you have eliminated the impossible, that which remains, however > improbable, must be the truth." > --- Sir Arthur Conan Doyle > > > On Wed, Oct 21, 2009 at 10:48 AM, Brad Belton <b...@belwave.com> wrote: > > >> Hmmm, pretty sure a 2' dish is a 2' dish regardless of frequency...or are >> you speaking of the diameter of the feed? >> >> Best, >> >> >> Brad >> >> -----Original Message----- >> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >> Behalf Of Josh Luthman >> Sent: Wednesday, October 21, 2009 9:40 AM >> To: WISPA General List >> Subject: Re: [WISPA] Identifying 2ft dish frequency >> >> Can you measure diameter and compare it with the 2.4 and 5.8 GHz dishes? >> Never thought about it but they would have to be different sizes. >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> "When you have eliminated the impossible, that which remains, however >> improbable, must be the truth." >> --- Sir Arthur Conan Doyle >> >> >> On Wed, Oct 21, 2009 at 10:34 AM, Mark McElvy <mmce...@accubak.com> wrote: >> >> >>> I happen to know they are either 5.8 or 2.4 as this was the only >>> equipment I have found of theirs, they left it all when they went out of >>> business. >>> >>> Mark McElvy >>> AccuBak Data Systems, Inc. >>> 573.729.9200 - Office >>> 573.729.9203 - Fax >>> 573.247.9980 - Mobile >>> http://www.accubak.com/ >>> http://www.accubak.net/ >>> Nationwide Internet Access >>> Accurate backups for your critical data! >>> >>> >>> -----Original Message----- >>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >>> Behalf Of ccrum >>> Sent: Wednesday, October 21, 2009 9:29 AM >>> To: WISPA General List >>> Subject: Re: [WISPA] Identifying 2ft dish frequency >>> >>> Got a spectrum analyzer and a frequency generator? Or a good network >>> analyzer will do, but most people don't have one laying around. The >>> feeds could literally be anything. You might be better off just calling >>> the MFG of the dish and buying new feeds in the range you want unless >>> you you have a few hours of extra time on your hands. >>> >>> Cameron >>> >>> Mark McElvy wrote: >>> >>>> I have 4 two ft dishes that where pulled down when the previous wisp >>>> went out of business. There are no markings on them and I need to >>>> determine frequency and polarity. >>>> >>>> >>>> >>>> Mark McElvy >>>> AccuBak Data Systems, Inc. >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>> ------------------------------------------------------------------------ >>> -------- >>> >>>> WISPA Wants You! 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