[TowerTalk] CAT5E based RX SWITCH for remote RX ANT distribution

[gwj at me.com]

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 at yahoo.com <mailto:om8aw at 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