www.itllc.net
They have a relay link on my 180' tower at the 100' level and I get free
service.
Carl
KM1H
----- Original Message -----
From: "J. Gordon Beattie, Jr., W2TTT" <w2ttt@att.net>
To: "'jeremy-ca'" <km1h@jeremy.mv.com>; "'Roger (K8RI)'"
<K8RI-on-TowerTalk@tm.net>; <towertalk@contesting.com>
Sent: Saturday, July 21, 2007 12:23 PM
Subject: RE: [TowerTalk] help with interference problems
> Carl,
> What service do you have that involves two microwave hops to get to your
> ISP?
> 73,
> Gordon Beattie, W2TTT
> 201.314.6964
> W2ttt@att.net
> W2ttt@arrl.net
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of jeremy-ca
> Sent: Friday, July 20, 2007 12:16 AM
> To: Roger (K8RI); towertalk@contesting.com
> Subject: Re: [TowerTalk] help with interference problems
>
> My thruput via 2 microwave hops to my ISP's T3 Verizon fiber is 4.33 Mbps
> at
>
> the moment. That translates to 4431.3 kbps. T1 is 1500 kbps.
>
> Id say Im flying quite well even with 250' of wet Cat5e which is taped
> right
>
> to the hardline bundle for the last 15' where it comes down off the
> messenger cable (1/4" EHS) and into the basement conduit..
>
> Sure beats cable or DSL.
>
> Carl
> KM1H
>
> ----- Original Message -----
> From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
> To: <towertalk@contesting.com>
> Sent: Thursday, July 19, 2007 7:32 PM
> Subject: Re: [TowerTalk] help with interference problems
>
>
>>
>>
>>
>>>
>>> At 09:48 PM 7/17/2007, Roger (K8RI) wrote:
>>>
>>>> > My Internet link is a 5.6GHz radio at the 100' level on the tower
>>>> > with
>>> an
>>>> > 11
>>>> > mile shot to the ISP. I come down the tower with shielded CAT5 to the
>>>> > router
>>>> > in a trailer at the base of the tower; this is run with about 8 turns
>>> thru
>>>> > a
>>>> > FT240-43 toroid . Then a 250' run of regular CAT5 to the house and a
>>>> > 8
>>>> > port
>>>>
>>>>Lordy...I'm running a gigabit network through 130' of CAT5e parallel to
>>>>and
>>>>within about 5 to 10 feet of all the coax runs to the tower. (75 to 90
>>> feet)
>>>>It then runs under the 75 half wave sloper to the shop. I found that
>>>>even
>>>>a
>>>>metal staple used to loosely hold the cable created enough inductance to
>>>>screw up the network. It won't work in metal conduit either.
>>>
>>> I would be surprised if you ever get this running right at 1Gb speeds.
>>
>> It's running close with 105 to 115 MBs being typical between any two
>> computers. Running a KW on SSB doesn't seem to show up as affecting the
>> speed on the network monitor.
>>
>>> Gigabit speeds on Ethernet are really fussy and very susceptible to
>>> interference. The only thing you have going for you is that it is
>>> shielded
>>> cable, which does help.
>>
>> It's not. I'm using CAT5e which is really fussy to run.
>>
>>> - Don't make sharp bends in the cable.
>>
>> I use sweep Ls for all corners. Like one staple, I found one kink caused
>> problems.
>>
>>> - Don't run the cable next to other cables.
>>
>> The CAT5e runs all by itself, but parallel to and about 5 to 10 feet from
>> the cables going to the tower.
>> That is except for each end which ends up in a rats nest of cables but
>> only
>> for about 5 feet.
>>
>>> - Don't crush the cable with tie wraps etc.
>>
>> AMEN!
>>
>>> - GB Network cards that are on the MB are notoriously poor in
>>> performance.
>>
>> I have two that are using the native NICs on the MB. One is an ASUS M2N
>> SLI
>> Deluxe and the other is a Gigabyte of which I have forgotten the model
>> but
>> it uses the 590 chipset. These seem to run as well as the others using
>> PCI
>> NICs, but the ASUS is only about 3 months old and the other is around 2
>> IIRC. At any rate they are late models. The first is running an Athlon
>> 64
>> FX62 and the other is an Athlon 64 X2 6000.
>>
>>> A 'good' aftermarket card usually works better.
>>> - Again, very susceptible to interference.
>>> - This appears not to be a problem, but If your runs are more that 100
>>
>> I'm only running a 130 feet.
>>
>>> meters, then since the velocity factor of the twisted pair sets in the
>>> cable
>>> are different, (to eliminate crossover issues) the signals arriving at
>>> the
>>> far end are too far enough out of sync.
>>>
>>> If you are still unsuccessful, look into using single mode fiber if you
>>> can.
>>>
>> It's working great and I'm afraid to touch anything. <:-))
>>
>> 73
>>
>> Roger (K8RI)
>>
>>> James Wolf, KR9U
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
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>
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>
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