I haven't bought B11s, just while scouting for options, I *COULD* do B11s. I could also swap them out later for something else like an AlfoPlus2.
Why would I do a B11? Cheapest 11 GHz link with an SFP. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Bill Prince" <[email protected]> To: [email protected] Sent: Monday, November 7, 2016 10:51:11 PM Subject: Re: [AFMUG] Class A and B antennas +1 Inquiring minds. bp <part15sbs{at}gmail{dot}com> On 11/7/2016 8:47 PM, Sean Heskett wrote: If you are in a congested RF environment why on earth would you waste the spectrum on a B11? It only does 256QAM On Mon, Nov 7, 2016 at 6:42 PM Mike Hammett < [email protected] > wrote: <blockquote> *nods* I asked about going from a 3' to a 6' SHP dish, no go. That said, I've got a couple paths in HFT central where I can still do B11s. :-) ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP From: "George Skorup" < [email protected] > To: [email protected] Sent: Monday, November 7, 2016 7:39:31 PM Subject: Re: [AFMUG] Class A and B antennas My finger clicked send before my brain. Interestingly, a RadioWaves HP2-11 has 60dB f/b ratio and is a Cat B. While a HP3-11 has 62dB f/b and is Cat A. The VHLP800-11 has 59dB f/b and is Cat A while being only 3" smaller in actual diameter vs the HP3-11 (35.5" for a "2.5" foot antenna, vs a 38.4" 3 foot). But a bit weaker f/b ratio than a HP2. Both are shrouded. I don't get it. I think there may be something else like main lobe beamwidth, too. The problem with all this Cat A vs B stuff is it really doesn't matter anymore in congested areas. I had Liz look for a 56MHz channel on a path. She said nope. I said, OK, what about changing the 2' end to a 3'. She still said nope. Polarity, antenna size, etc., nothing mattered. Out of channels is out of channels. Good luck with those funky B11's. On 11/7/2016 7:09 PM, Mike Hammett wrote: <blockquote> Yes. Not a size requirement, just a suppression requirement. It's just what size of antennas normally meet those requirements. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP From: "George Skorup" <[email protected]> To: [email protected] Sent: Monday, November 7, 2016 7:08:11 PM Subject: Re: [AFMUG] Class A and B antennas IIRC, the classes are about front to back radio and sidelobe suppression. On 11/7/2016 6:45 PM, Mike Hammett wrote: <blockquote> 2.6' in 11 GHz. I forget who. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP From: "SmarterBroadband" <[email protected]> To: [email protected] Sent: Monday, November 7, 2016 6:34:03 PM Subject: [AFMUG] Class A and B antennas Does anyone make a 2 foot Class A antenna for 11 GHz? Or is 3 foot the minimum. Does anyone make a 1 foot Class A antenna for 18 GHz? Or is 2 foot the minimum. Is there a minimum distance for a 11 GHz link? Thanks Adam </blockquote> </blockquote> </blockquote>
