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Richmond VA AREDN -- 310 foot node in Richmond - Northern coverage

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k2viz
Richmond VA AREDN -- 310 foot node in Richmond - Northern coverage

Channel 133 is home to a single 120-degree sector antenna connected to a M5 rocket.  An internet feed is underway & should be completed by the 2nd week of September.

Let me know if there's any interest, a full 360-degree set of antennas/radios.  

KF4HJW
Richmond Node

Great work getting on the up there in Richmond.  Is this the water tower site or another location?

Is the site able to see other nodes  at this point  took a quick look at map didn't see your there but you may be like mine it does not show up for some reason .

A 360  coverage seems like a great idea for the area if that is possible.

73

KF4HJW

N4CV
More Info?

Can you better describe the location of the node? That's a good elevation but could still be affected by terrain, foliage, or other structures. I'm sure people would like to give it a try if they know where to find it.

What's the node name, and also assume that it's set for 20 MHz bandwidth?

k2viz
Richmond node update

N4CV,

As of 9/19/19 @ 3pm -- the site has been upgraded to (3) nodes,  moved slightly higher to 315' HAAT on a State owned building with a 25Mbps fiber-Internet feed.  The only known shading is in the direction of Woodlake/Brandermill -- the new Dominion Power building shields the view.

Channel spacing is set to 5Mhz, unfortunately downtown Richmond is extremely congested and 20Mhz barely worked at all.  The longest link without L.O.S. is 8.8 miles  (65' up on my tower in the West End with a M5-650 dish).


 

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N4CV
Where is it?

K2VIZ,
The three sector antennas look good and thanks for the photo.  I'll echo K9CQB's question...do you have the lat/lon or address for the building?  For service nodes like this, we need to know where to point the other antenna to connect to it!  

To confirm, you originally said it is on Channel 133 with a 5MHz bandwidth?  Are all three sectors on the same frequency?

Looks like a great addition to the Richmond AREDN scene.

N4CV

K6AH
K6AH's picture
Need to be on different channels

To avoid RF interference from each other, clustered nodes on the same band need to be on different channels. 

K9CQB
K9CQB's picture
I'd like to amplify these comments.

Everybody in Virginia thanks you for putting these 5Ghz nodes up. But I'd like to ask why you put them on 5MHz bandwidth. Normally we'll use 5GHz to shoot to really long distances between two Point to Point nodes that need that narrow bandwidth to decrease noise and extend their SNR at a small cost of bandwidth. And you've got to make sure that those 2 nodes work well at 5MHz BW, because their are many MikroTik and GL devices that don't work well at 5MHz.
If this was put up and intended to be a general access node cluster then they should all be on different frequencies to avoid receive interference (presents as noise). Hopefully one of them will be Channel 180 at 20MHz bandwidth - given it is the common access frequency in most of Virginia. I just want to remind the group that there are many nodes that don't work very efficiently at 5MHz bandwidth and therefore I try my best to avoid using it except for two nodes in long distance PtP mode.

-Damon K9CQB
 

K9CQB
K9CQB's picture
I'll be in Richmond in a few weeks. Where do I hit this thing?

K2VIZ,
I'd like to hit this node when I go down there to visit.
Along with the location and node-name, can you specify the azimuth/direction that the panel is pointing? I'm also assuming you're doing BW 20MHz on Channel 133?

-Damon K9CQB 

Kb4yfk
with Lat/Long could we put a tower node in Williamsburg?

If we could possibly reach wmbg?  not encouraging seeing a 8.8 mile range.  we are 45-50 miles, but possibly get a tower location for a link node down to 2.4.
need to run the numbers.  so Lat/Long of the RIC antenna?   at the same time pass it down to Newport News?  (HJW?) 

almost answered my own questions.  Ran the numbers from the *AREDN map* page, the azimuth might be off... but looks doable.
thanks-
john --KB4YFK

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K6AH
K6AH's picture
These are tall towers...

As you've modeled the link, the towers on each end are over 300' tall !

k2viz
RIC to WMBRG

I've found the link calculators to be over-estimations.  I tried to setup a 23 mile link at 5ghz (perfect line of sight) with a 26db MikroTik, it barely established link -- we're going back in a few days with a 29db Ubiquiti for a more solid link.  It'll be published on the map once it goes up & is stable  (Beaverdam, VA to Richmond, VA) -- We're building this out to support our DMR radio system, Williamsburg needs some UHF DMR :) 

If anyone has contacts with New Kent public safety for access to the Town-of-New-Kent tower, the money is available for build-out.

Richmond to Williamsburg is "not possible", but would work with a hop in New Kent at 150' or more.

KF4HJW
Frostfest 2020

I know Frostfest is several months away wondering is the Frostfest Site in the RF window of the Richmond node?  If not any possiblity that planned growth in the area might get the site on the network?

Thanks again for the efforts of the folks in Richmond area.
73

k2viz
Frostfest coverage & 5mhz channels

A 5ghz Omni-node a 1/2 mile from Frostfest should be added within the next month.

Everything in Richmond will be running at 5mhz for 3 reasons:  Metro-Richmond is highly congested as it is from the VCU 5ghz deployments, a 5mhz single has a higher SNR than a 20mhz channel -- and for the bandwidth anticipated, there is no need for 20mhz.

If anyone would like to donate $10,000 or more and secure suitable tower-sites, we will gladly switch the build-out to 20mhz :)   

I will 2nd the issue that Mikrotik doesn't work well at 20mhz, I have a 27db unit & the sensitivity is TERRIBLE on 5mhz channels.

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