Hello,
5.9GHz is awesome when it works. The speeds are great, and it carries
as far as the eye can see with very low ambient noise floor. It does
however have problems when it needs to penetrate trees and buildings.
To alleviate this, I'd like HamWAN to offer a slower but deeper
penetrating 900MHz service. 900MHz is the lowest frequency ham band
without bandwidth or modulation rate restrictions. Before we deploy a
full cell site, I'd like to get some real-world experience with 900MHz
penetration, propagation and ambient noise conditions. Here's the
cheapest appropriate hardware we can use for this:
1x Vpol omni antenna @ $79.50/ea = $79.50
(http://www.balticnetworks.com/laird-antenna-omni-8dbi-900mhz-n-female-integ…)
2x 9HPn modem @ $108.00/ea = $216.00
(http://www.balticnetworks.com/mikrotik-metal-9hpn.html)
1x Shipping @ $UNKNOWN (quote not showing?! Need to call them.) =
$40.00 ???
Total: $335.50
I already have a 900MHz high gain Yagi-Uda in my inventory and can use
that to do various field tests. These can be directly compared against
5.9GHz performance since the gear will be deployed to one of our
existing 5.9GHz cell sites. The results of such comparisons will give
us a good idea of how well 900MHz might do for HamWAN.
Disclaimer: These may not be the right modems or antennas for us
long-term. A real deployment might use Ubiquiti Rocket M900 with their
sector antennas. These Ubiquiti items are far more expensive though,
and their software doesn't integrate as easily into our network, so for
the purposes of the test I believe the set of hardware I proposed will
do well at deploying fast and keeping costs down.
NOTE: If both the votes are approved, I will combine shipping from
Baltic to save money.
--Bart
Bart, they are only viable as second hand items. It was the first gen wisp gear circa 2002, And they can't give the away on eBay. 2mhz channel and gfsk modulation, about 1.6 mbit/s. Gfsk can use a class c amp too....
Bsc in st Louis has over 1k of the modems in stock last I spoke with them.
I'm happy to provide tech support and firmware for your group on these, and how to convert them to ap units.
I can see if I have a contact for OAL when i get home. I can't stress enough how H pol will make a difference for you, or at least did for me.
OAL makes a H pol mobile wheel antenna too.
For ham radio it's hard to beat cheap😀
On March 6, 2015 1:57:03 PM EST, Bart Kus <me(a)bartk.us> wrote:
>Please provide an URL can we could source these from. I don't wanna
>take a dependency on any 2nd hand market stuff.
>
>Yes, H pol will work a lot better, but V pol is the only viable option
>for mobile. Therefore, I'm choosing to focus this test on V pol.
>
>--Bart
>
>
>On 3/6/2015 10:50 AM, Bryan Fields wrote:
>> You might want to check out the alvarion fhss 900mhz radios. You can
>> pickup the su units cheap and convert them to ap's.
>>
>> You will want to run H pol , check out the old antenna lab, he's got
>a
>> 900 mhz omni that works well.
>>
>> Even with this expect only 2 to 3 miles of tree penetration.
>>
>> 73s W9CR
>>
>> On March 6, 2015 1:38:16 PM EST, Bart Kus <me(a)bartk.us> wrote:
>>
>> Hello,
>>
>> 5.9GHz is awesome when it works. The speeds are great, and it
>carries
>> as far as the eye can see with very low ambient noise floor. It
>does
>> however have problems when it needs to penetrate trees and
>buildings.
>> To alleviate this, I'd like HamWAN to offer a slower but deeper
>> penetrating 900MHz service. 900MHz is the lowest frequency ham
>band
>> without bandwidth or modulation rate restrictions. Before we
>deploy a
>> full cell site, I'd like to get some real-world experience with
>900MHz
>> penetration, propagation and ambient noise conditions. Here's
>the
>> cheapest appropriate hardware we can use for this:
>>
>> 1x Vpol omni antenna @ $79.50/ea = $79.50
>>
>(http://www.balticnetworks.com/laird-antenna-omni-8dbi-900mhz-n-female-integ…)
>> 2x 9HPn modem @ $108.00/ea = $216.00
>> (http://www.balticnetworks.com/mikrotik-metal-9hpn.html)
>> 1x Shipping @ $UNKNOWN (quote not showing?! Need to call them.)
>=
>> $40.00 ???
>>
>> Total: $335.50
>>
>> I already have a 900MHz high gain Yagi-Uda in my inventory and
>can use
>> that to do various field tests. These can be directly compared
>against
>> 5.9GHz performance since the gear will be deployed to one of our
>> existing 5.9GHz cell sites. The results of such comparisons will
>give
>> us a good idea of how well 900MHz might do for HamWAN.
>>
>> Disclaimer: These may not be the right modems or antennas for us
>> long-term. A real deployment might use Ubiquiti Rocket M900 with
>their
>> sector antennas. These Ubiquiti items are far more expensive
>though,
>> and their software doesn't integrate as easily into our network,
>so for
>> the purposes of the test I believe the set of hardware I proposed
>will
>> do well at deploying fast and keeping costs down.
>>
>> NOTE: If both the votes are approved, I will combine shipping
>from
>> Baltic to save money.
>>
>> --Bart
>>
>>
>------------------------------------------------------------------------
>>
>> PSDR mailing list
>> PSDR(a)hamwan.org
>> http://mail.hamwan.net/mailman/listinfo/psdr
>>
>>
>> --
>> Bryan Fields
>> 727-409-1194
>> http://bryanfields.net
--
Bryan Fields
727-409-1194
http://bryanfields.net
--
Bryan Fields
727-409-1194
http://bryanfields.net
You might want to check out the alvarion fhss 900mhz radios. You can pickup the su units cheap and convert them to ap's.
You will want to run H pol , check out the old antenna lab, he's got a 900 mhz omni that works well.
Even with this expect only 2 to 3 miles of tree penetration.
73s W9CR
On March 6, 2015 1:38:16 PM EST, Bart Kus <me(a)bartk.us> wrote:
>Hello,
>
>5.9GHz is awesome when it works. The speeds are great, and it carries
>as far as the eye can see with very low ambient noise floor. It does
>however have problems when it needs to penetrate trees and buildings.
>To alleviate this, I'd like HamWAN to offer a slower but deeper
>penetrating 900MHz service. 900MHz is the lowest frequency ham band
>without bandwidth or modulation rate restrictions. Before we deploy a
>full cell site, I'd like to get some real-world experience with 900MHz
>penetration, propagation and ambient noise conditions. Here's the
>cheapest appropriate hardware we can use for this:
>
>1x Vpol omni antenna @ $79.50/ea = $79.50
>(http://www.balticnetworks.com/laird-antenna-omni-8dbi-900mhz-n-female-integ…)
>2x 9HPn modem @ $108.00/ea = $216.00
>(http://www.balticnetworks.com/mikrotik-metal-9hpn.html)
>1x Shipping @ $UNKNOWN (quote not showing?! Need to call them.) =
>$40.00 ???
>
>Total: $335.50
>
>I already have a 900MHz high gain Yagi-Uda in my inventory and can use
>that to do various field tests. These can be directly compared against
>
>5.9GHz performance since the gear will be deployed to one of our
>existing 5.9GHz cell sites. The results of such comparisons will give
>us a good idea of how well 900MHz might do for HamWAN.
>
>Disclaimer: These may not be the right modems or antennas for us
>long-term. A real deployment might use Ubiquiti Rocket M900 with their
>
>sector antennas. These Ubiquiti items are far more expensive though,
>and their software doesn't integrate as easily into our network, so for
>
>the purposes of the test I believe the set of hardware I proposed will
>do well at deploying fast and keeping costs down.
>
>NOTE: If both the votes are approved, I will combine shipping from
>Baltic to save money.
>
>--Bart
>
>_______________________________________________
>PSDR mailing list
>PSDR(a)hamwan.org
>http://mail.hamwan.net/mailman/listinfo/psdr
--
Bryan Fields
727-409-1194
http://bryanfields.net
Hello,
Over the past year the Sector 3 modem @ Haystack has locked up several
times and has needed to be power cycled to bring it back to life. There
is clearly something wrong with the PCB since it's running the same
software as the others. I'd like to replace this PCB next time we go up
there. Here is the cost breakdown:
1x RB912UAG-5HPnD @ $69/ea = $69
(http://www.balticnetworks.com/mikrotik-routerboard-912uag-5hpnd.html)
1x Shipping @ $15.09 = $15.09
Total: $84.09
--Bart
Hello All,
We’re working to migrate some of our services away from our current provider to new ones, and one of the changes we’re making is with the mailing lists. We are working on moving to Google Groups on our HamWAN.org <http://hamwan.org/> account, and you should receive an invitation to join the new group. If you wish to continue getting mailing list messages in the future, I recommend that you follow through on that invitation.
I will send another message with further details once the switchover has actually been made. For now this is just getting the new group set up, and ready for use.
Please let me know if you have any questions, and I’ll be happy to help.
Thanks,
Nigel VH
HamWAN
