Hy all.
On 16-06-2007, we (CISAR, a radioHAM italian association) have realized a 304km link (about 100km ground and 200km sea surface), between Amiata mount (1734asl) and Limbara mount (1300 ca asl).
We utilized a pair of wrap board (but they will be replaced by a new RB532 soon), a pair of Ubiquiti XR5, and a pair of handmade antenna (120cm satellite dish for the surface, and a bronze ball-bearing extracted from a bus).
The signal received on both end was from -58dBm to -62dBm, bitrate between 12 and 48Mbps, CCQ between 70 and 100.
IW5CGM and IK0TCL on Amiata mountain
Me (IZ3HAD) on Amiata Mountain
IK0PCJ and IK0YUK on Limbara site.
IW0UIF on Limbara Mountain
The feed (we used the feed on the left)
On the moment i’m writing, this seems to be a distance world record (the precedent was from “Politecnico di Torino” on Italy, 295km).
The people which partecipate on this WR:
@GotNet (or N4HHA): this is the natural evolution of the old FM repeater, no more echolink needed, hi!
@rickard: TCP band, on a bandwidth of 5MHz, was about 5Mbps. The most important thing was the latency: it was between 8 and 20ms. We tested it with the routerboard onboard b-test from one of the two site.
I’m sorry, but i can’t provide a real traffic data speed (PC-PC), becouse, on Amiata’s mountain, there was a loooot of radio frequency (3 FM repeater @ 6kw - 3 x 2kw - at 3m that pointed us), and we can’t made a succesfully connection between the board and a pc (the board was only 10m from the pc!).
The link was dismantled at the end of the day, and it will be reran on the end of August (we will have a permanent authorization for that date).
EDIT: I posted some photo of the feed on the first post of this thread.
OMG!!!
Last time we made a record (261,1km, it was only an italian record) we was “defeated” only 3 days after by a 295km link.
We are very unlucky…
Next time we will look for a 1000km link to be sure that our record will not beated as soon as this two times!
They have 6W amps, a stratospheric balloon 30km high, 2.4 meters dish antenna controlled by automatic tracking system using GPS, The Swedish Space Corp. partnership, 3k€ or more equipment (only motherboard + radio card, of course), 2,4GHz. 310km.
We have: NO amps (600mW card lowered then to 10mW), 1700m asl one site and 1300m asl the other site, 120cm dish antenna with self-made feed controlled by…my (and my friend) hands , NO partnership, 300€ or less (total) equipment (motherboard + radio card + pigtail + case…of course), 5,7GHz (more fading, more dispersion, more free space loss). 304km.
Ok, you are right, THEY have the records (on 2,4GHz, of course), but…can you compare this two situations (for 6km difference)?
This was only a test link, which will be reinstalled as a fixed link on late August 2007, but we have test it for about 3-4 hour, and it was rock-solid.
More details when we will rebuild that link on, as i wrote above, late August 2007.
Gr8 work Mirco!.
I’m also in Italy, but at Como.
Did u do test 4 your real throughput in a Full-Dúplex (I ask u because I’m a WISP and I use MTK and other products).
