can he "replace" an existing antenna with a different one? On Wed, Mar 25, 2020 at 3:19 PM <ch...@wbmfg.com> wrote:
> He can’t hang another antenna. > > *From:* Kurt Fankhauser > *Sent:* Wednesday, March 25, 2020 1:11 PM > *To:* AnimalFarm Microwave Users Group > *Subject:* Re: [AFMUG] AF11 custom combiner > > Yeah your insertion loss is going to kill the performance of the link, why > may I ask are you trying to do this other than the obvious reason of not > wanting to hang 2 antennas. Why not just get a more efficient radio for the > link like Aviat? We just bough our first aviat link to replace an AF11 link > this week. > > On Wed, Mar 25, 2020 at 3:07 PM <ch...@wbmfg.com> wrote: > >> Now that I think about it, this will not work without sharp bandpass >> filters >> on the transmitters. >> To do what I have drawn here without the filters you would need a hybrid >> combiner on the TX and you will lose another 3 dB in that. >> >> So 6 dB loss over all from one end to the other. >> >> -----Original Message----- >> From: ch...@wbmfg.com >> Sent: Wednesday, March 25, 2020 1:00 PM >> To: Nate Burke ; af@af.afmug.com >> Subject: AF11 custom combiner >> >> Nate, I am posting this to the list too. Want to see if I made a mistake >> here. I don't have a ton of experience with the internals of the AF11. >> I think each diplexer feeds a TX and an RX right? >> Not sure how good the RX input filters are. So I used a splitter rather >> than circulators. >> >> Circulators would have less loss but you have to have a pretty sharp >> bandpass filter on the front of the receivers to do that trick. >> You could add the filters. >> >> Not sure this will work without TX filters too but I think it will. >> >> -----Original Message----- >> From: Nate Burke >> Sent: Wednesday, March 25, 2020 11:15 AM >> To: ch...@wbmfg.com >> Subject: Re: Re: AF11 custom combiner >> >> Both paths are dual polarity v/h >> SiteA >> Radio1 TX 11505 >> Radio2 TX 11225 >> >> SiteB >> Radio1 TX 11015 >> Radio2 TX 10735 >> >> Those are different Diplexers on the AF11 Radios 11015x11505 is the >> high diplexer 11225x10735 is the low diplexer. If they were just >> single pol licenses, I'm already doing that with 2 radios on 1 AF11 >> dish, one radio on V one radio on H. >> >> Thanks, >> Nate >> >> >> On 3/25/2020 12:07 PM, ch...@wbmfg.com wrote: >> > 10735 is pretty close to 11015. Would these be tx frequencies? >> > Need to know what is RX and what is TX at this site. Also what is on >> what >> > polarization. >> > -----Original Message----- From: Nate Burke Sent: Wednesday, March 25, >> > 2020 10:55 AM To: ch...@wbmfg.com Subject: Re: AF11 custom combiner >> > The boss is asking the questions, and in his mind it should be as simple >> > as wire-nutting the 3 coax's together. So I have to follow up with why >> > that won't work and present a solution for him. >> > >> > Channels we have are >> > 11505x11015 (high) >> > 11225x10735 (low) >> > >> > Thanks, >> > Nate >> > >> > On 3/25/2020 11:10 AM, ch...@wbmfg.com wrote: >> >> Yes, you can do that and it is lossy. >> >> Circulators and splitters are frequently used. >> >> Being high/low licenses makes things a bit more difficult. >> >> >> >> If you can give me details as to what radios and frequencies you want >> to >> >> put on the AF11 dish I can think on it a bit. >> >> >> >> -----Original Message----- From: Nate Burke >> >> Sent: Wednesday, March 25, 2020 9:44 AM >> >> To: Chuck McCown >> >> Subject: AF11 custom combiner >> >> >> >> Chuck, We've been using your AF11 REMEC adapters in a couple places. I >> >> have a location where I can't physically add another Dish, but I do >> have >> >> 2 licensed channels to the site. 1 high band and 1 low band. Is there >> >> a way to combine 2 dual band radios onto the same dish? I already have >> >> the AF11 dish installed, so if there was just a way to do a >> >> splitter/combiner with the N Connectors, that would be ideal. I didn't >> >> know if such a beast existed, or if it was something in your >> >> engineering/production toolbag, or if it's technically impossible. >> >> Maybe using the Coax would be too much loss, and the only way to do it >> >> would be with a feedhorn combiner, and the remec adapters. I thought >> >> this might be something that you would just know off the top of your >> >> head. >> >> >> >> Thank you, >> >> Nate Burke >> >> Blast Communications >> >> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > ------------------------------ > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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