Very nice work Bela. One question for you. I have never measured crosstalk in
CAT5E cable so I was wondering if the RS485 couples into the receive signals at
all. From the data that I have seen, isolation should be very good in the HF
bands, at least 60 dB. Good thing you have a LNA for each signal.
73,
Gary NA6O
>
> From: Vojtech Ritzko <om8aw@yahoo.com <mailto:om8aw@yahoo.com>>
> Subject: [TowerTalk] CAT5E based RX SWITCH for remote RX ANT
> distribution
>
> HI ALL
>
> Our QTH at OM0M ?islimited in space and there is not room for extended phased
> beverage systems.
> I am trying my best to build system with RDF well over 14dBon limited space
> QTH.
>
> (Kill the side lobs and your RX will love you too.)
>
> W1FV-9 circle for 4 directions as well as linear 4el inlinesystem for USA
> were built in field day styleprior the CQ 160.
>
> Well done, but how to connect the hamshack with RX HUB?
>
> Single RG6 and CAT5E FTP ?cable were directly ?buried ?undersurrounding road?
> in past.
>
> Initial design - RG6 for RF and CAT5E for relay control isnot sufficient nova
> day.
>
> No cable duct = no way to extend anything.
>
> The only chance is to use the unoccupied 100 Ohms pairs inCAT5E to carry RF
> too.
>
> CQ WW 160 was the best chance to test RX systems in toughcontest conditions.
>
> Technicaldetails on enclosed google disk file:
>
> PDF :
> https://drive.google.com/file/d/1gTtywxB_sgZYRfgy42YB9wCTE9RqV3Cr/view?usp=sharing
>
> Eznec for 9CC:
> https://drive.google.com/file/d/1idf6JsQ32UrEQNs_7yc3hrrMWKT77DQH/view?usp=sharing
>
> Eznec for 4el:
> https://drive.google.com/file/d/19E_VXwYVG1HiDWNU9yybygsKPt0yjeKY/view?usp=sharing
>
> VY73 DX
> BelaOM8AW
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