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VK3JMA > TECHNI 19.08.03 15:52l 71 Lines 2240 Bytes #999 (0) @ WW
BID : 060201VK3JMA
Read: GUEST OE7FMI
Subj: Re: Technical ham radio
Path: DB0ZKA<DB0CRL<DB0SAA<DB0TTM<DB0FP<DB0CWS<DB0ROF<DB0ERF<DB0FBB<DB0GOS<
DB0EEO<DB0RES<OK0PPL<OK0NAG<9A0BBS<VK6BBS<VK6HGR<VK3AYM<VK3DSE
Sent: 030819/0934Z @:VK3DSE.#MEL.VIC.AUS.OC #:56234 [Narre Warren] FBB7.00g25
From: VK3JMA@VK3DSE.#MEL.VIC.AUS.OC
To : TECHNI@WW
Hello,
VK2AAB wrote:-
> Mark VK3JMA mentions the 2Ghz 1,800 whatever it is system that can be used in
> amateur radio. I see that they are using it in VK4 land.
>
2.4 GHz Barry!!??
> We looked at doing something here on our clubs repeater site but with the
> power levels that are available it seemed doomed from the start.
> The repeater is located on a good site, one of the highest in Sydney but it is
> not on the edge of the plateau, but some kilometers back.
>
> This means that the Parramatta River basin is not visible and there are no line
> of sight
Do a bit of research. If you are going to go 802.11b and send repeater
audio/video/whatever over data to another site there "repeating' the data
is very simple. A DLINK 900AP+ Access point can be used in various modes,
including, as a repeater. Ok, given 2 sites are required but none the
less it can be done.
> areas that could give wide coverage of amateurs. Even if we had such
> a view we would need more power than the mwatts that this gear puts out.
>
Barry, again, a bit of research. mW are *very* capable of long LoS
distances. As I think I stated in an earlier bulletin 30 to 40 mW can
travel 10-12 Km's when good GAIN antenna are used.
> I did look on the internet for amplifiers, but I believe unless we could get
> to around 10 watts we would be wasting our time & money.
Geez, 10Watts at 2.4 GHz would be fantastic, but not required.
As stated earlier, first hand information of a Mt Dandenong to St Albans
2.4 GHz 802.11b contact, 200mW 25dbi antenna at Mt Dandenong, 32mW 25bdi
gain antenna at St Albans, path around 50Km's. Now that link could have
carrier any infomation that teh users chose to place on it.
>
> There is a section on the ARRL web site devoted to these systems.
Grouse, I will visit that site next time I am on line.
Just because it is 2.4 GHz, low power, Class Licence in a ISM band, dont
discount the communication method out of Amateur Radio, it is after all a
COMMUNICATION means, and that is what we are all about.
Best Regards
Mark
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73 - Mark, VK3JMA
email: vk3jma@net2000.com.au
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