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Thread: Cabling 2.4 GHz RF

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    Member nickbo's Avatar
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    Default Cabling 2.4 GHz RF

    I have a need to try and hook up a wireless LAN over about 500 m and was going to try a couple of cheapo parabolic dishes from Jaycar just stuck on the back of my standard old wireless lan cards.

    My questions is to do with cabling.

    I am going to try RG213 - the low loss 50 ohm stuff or LMR 400 -if i can get it.

    I am just interested to see if anyone else has done this. Any practical tips etc ?

    Cheers

    nickbo

    Note to mods. I double posted this into Communication stuff as well - just to cover both



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    if at all possible, mount the Accesspoint (if your using one) right up at the antenna and run ethernet cable back to your network (plus power or power over ethernet).

    If you are using cards, like I think you mentioned, then the run of coax should be as short as possible. I run around 15m of LMR400 up to a 8dbi omni antenna and although I see many access points, the signal levels are well down from when I stumbled on the roof with my laptop and a short length of cable.

    Stay away from RG213, it is not designed for much 500MHz and the loss is very high /100m above 1000 MHz. Although, RG213, is better than nothing for a meter of so if mounting equipment at the antenna.

    have fun

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    Thanks Porkop - that's great info.

    If there is a marginal increase in $/m what would be the next best step up from the LMR400 - or isn't there one.

    It will be an Ad-Hoc connection rather than via an A/P so I figured that with a Parabolic dish (I thing the gain is around 12 dB) it might just cover my bum. The cable run can be around 7 metres.

    Cheers and thanks again.

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    Member Extradry's Avatar
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    Try two cheap linksys routers with DDWRT (check Wiki for details on models)

    I have a 2 KM link almost line of sight on two 15DBI flat panels full 54 MB link for the past 18 months on the above setup

    7 meter run id be using LDF 450 andrews cable but it is $$$$

    better option is to mount the router in a waterproof enclosure and mount just under antenna. The run poe to the router. That way your pigtail (router to antenna) will only be 300MM tops.

    Regards
    Extra

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    Good suggestion.

    Cat 5 and a power cable is gonna be cheaper for sure. I always thought a parabolic dish was going to give me the best gain but it looks like the panel might be an option to look at. Nonetheless, 24 dB (I thought it was 12 - but had another look) might be an overkill.

    $/dB the panel looks the go at about $65


    Quote Originally Posted by Extradry View Post
    Try two cheap linksys routers with DDWRT (check Wiki for details on models)

    I have a 2 KM link almost line of sight on two 15DBI flat panels full 54 MB link for the past 18 months on the above setup

    7 meter run id be using LDF 450 andrews cable but it is $$$$

    better option is to mount the router in a waterproof enclosure and mount just under antenna. The run poe to the router. That way your pigtail (router to antenna) will only be 300MM tops.

    Regards
    Extra

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    nickbo is you want to pay the postage I have some lmr400 you can have

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    Member nickbo's Avatar
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    Thing, you are a legend.

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