F-13 qnw wireless routers -

Bob Goodwin bobgoodwin at wildblue.net
Sat Aug 7 21:54:20 UTC 2010

  On 07/08/10 17:32, Gene Heskett wrote:
> Absolutely Bob.  About the practical Maximum Usable Frequency of coax is in
> the 2.2 Ghz range, and that is for 1.625 inch heliax or better yet, rigid.
> About $7 to $12/foot, used.  I have used smaller stuff, but at 1.5Ghz
> ranges, with buckets of powered gain on the sending end, it can make it 300
> feet still strong enough to drive a 950-1450mhz satellite receiver over
> quad shielded RG11.  Those teeny little cables they put on so-called 7DBI
> antennas actually have a loss of several DB/meter.  I have one of those,
> tested at about + 0.5 DB over the cards rubber ducky at its best placement.
> Needless to say, any connectivity I have in the attached workshop,
> separated from here by 3 walls, one of which still has the alu house siding
> on it, is by way of a 150 foot cat5 cable to the outbuilding my cnc mill is
> in, thru a 100base-t hub out there, and another 100 foot of cat5 across the
> yard and in a side window of the garage.  PIMA, but it works.  That first
> 150 footer has been strung overhead, swinging in the wind for at least 6
> years now, and in fact survived a wind on June 24 that took down 3 of the 5
> mature trees on my property, and measured 112 mph on a recording anemometer
> about a block away, downwind.  I am amazed that a common piece of Belden
> blue cat5, right out of a 1000' box, is still working, but it is.
> [root at coyote linux-]# ping shop
> PING shop.coyote.den ( 56(84) bytes of data.
> 64 bytes from shop.coyote.den ( icmp_seq=1 ttl=64 time=1.76
> ms
> 64 bytes from shop.coyote.den ( icmp_seq=2 ttl=64 time=0.142
> ms
> 64 bytes from shop.coyote.den ( icmp_seq=3 ttl=64 time=0.140
> ms

Those  look like good numbers, better than I am getting through 15 ft 
and a gigabit switch. I hope the format doesn't get mangled?

    [bobg at box9 ~]$ ping -c3
    PING ( 56(84) bytes of data.
    64 bytes from icmp_seq=1 ttl=64 time=0.796 ms
    64 bytes from icmp_seq=2 ttl=64 time=0.144 ms
    64 bytes from icmp_seq=3 ttl=64 time=0.161 ms

    --- ping statistics ---
    3 packets transmitted, 3 received, 0% packet loss, time 2000ms
    rtt min/avg/max/mdev = 0.144/0.367/0.796/0.303 ms

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