Recent Posts

Pages: [1] 2 3 ... 10
1
WeatherUnderground / Re: personal air pollution sensor
« Last post by Bunty on Yesterday at 11:21:52 PM »
If I got one it would be interesting how it's readings would compare with the one somebody else in town has installed.  Probably much the same, though.
2
Lightning / Re: Mounting poles and NOT attracting lightning.
« Last post by nincehelser on Yesterday at 10:37:25 PM »

Doesn't sound easy or cheap to me :)

Not if you're also adding in radials for antenna performance.

He's mixing two different applications.

The NEC codes for grounding antenna masts are nothing like this.
3
Lightning / Re: Mounting poles and NOT attracting lightning.
« Last post by hankster on Yesterday at 10:29:49 PM »
Straight from the ARRL (National Assoc for Amature Radio) it says http://www.arrl.org/files/file/Technology/tis/info/pdf/0208053.pdf :

The primary purpose of the external ground system is to
disperse as much of the lightning energy as possible into the
earth before it follows the feed line into the radio station. No
matter how hard one tries, some of it will follow the coax,
which is why you created the protection plan for the radio
equipment. The easier you make it for the strike energy to
dissipate in the earth before it gets to the radio station, the
less your equipment protection plan will be stressed.
With great diligence, hard work, no real estate restrictions,
plenty of funds and highly conductive soil, it is possible for up
to 90% of the strike energy to be dissipated in the earth, leaving
just 10% heading for your equipment.

Radials and Ground Rods
Spreading out from the base of the tower is a set of eight
radials. While the number of radials required for a particular
installation will be dependent on the soil conditions in your
location, the system shown here is a reasonable start. Each
radial is a bare copper wire (preferably, strap) buried 6 to 18
inches below grade. The radials should be positioned so that
the energy is dissipated away from the house.
Connected to the radials are ground rods. The ground rods
are spaced approximately twice the length of a ground rod.
For an 8-foot rod, the spacing would be 16 feet.


 [ You are not allowed to view attachments ]

Doesn't sound easy or cheap to me :)
4
Weather Web Cams / "Resource online but isn't responding to connection attempts"
« Last post by RXB2 on Yesterday at 10:16:03 PM »
is the message I got from windows network diagnostics.  I've been trying to get my FI9804P to display its image in a browser window.  I have the right IP address,  username, password, I can see live video from the camera using the Foscam IP Cam Client, been sending images via ftp to WU for three years, but I'm out of ideas for getting the image in a browser window.  The PC is wireless to the router, don't know if that matters. I tried a bunch of paths from https://www.ispyconnect.com/man.aspx?n=Foscam.  I tried turning off windows firewall, all antivirus, lowering security settings, cannot figure it out  ](*,)

Any ideas welcomed, thanks.
5
For Sunday - November 19, 2017 !   :grin:

   =D>
6
WeatherLink by Davis Instruments / Weatherlink Mobile not updating
« Last post by rhodesengr on Yesterday at 08:43:56 PM »
The info on Weatherlink Mobile says it is supposed to update automatically every 10 minutes. This is not happening on my Android phone (Galaxy S5). It never updates after opening the app. If I shut the app down and restart, it reads the new data. The URL to our data is working and updating as expected. I have looked at "data usage" settings on my phone and there is nothing restricting background refresh that I can see.

Any ideas? Anybody else running Weatherlink Mobile? Are you seeing auto updates or not? Our station is ncss4slot if you want to try the app with our data.
7
Lightning / Re: Mounting poles and NOT attracting lightning.
« Last post by nincehelser on Yesterday at 07:59:32 PM »
Maybe the question should be will an individual have the knowledge, take the time and spend to money to properly ground a pole for their weather station?

As mentioned before, there are published standards for things such as TV and amateur radio antennas, which have been found to work well.

It's not terribly hard or expensive.  Good sense might be in short supply, though.  The biggest problem I see is that ground rods are often not what they should be.  I've seen some installations where folks have grounded to a water supply pipe outside their house, not realizing the connection to the water main isn't metal (!).  Or they don't sink a copper ground rod deep enough in dry stony soil that isn't terribly terribly conductive.

8
I think I will pass
9
My advice at the present time is to not chase CWOP dewpoint ratings. I checked several of the stations around you and they all show dewpoint errors and they all show very strange "Worst standard deviation" numbers. The same thing has been happening for my station and surrounding stations here in Florida. My conclusion is that CWOP is broken. I have two stations collecting nearly identical readings and I am fairly sure that I am not off by their analysis of anywhere from 15 to 50 degrees.
10
johnd and dalecoy, thank you for the replies.
When I read about the 3 beep on power up I thought "there we go, get a new one."

I have carefully inspected the male and female socket that the logger plugs into and they do not have any bent pins, the logger seats correctly. I have reloaded Weatherlink from the CD on a Win 8.1 box and same problem, real time data displayed, archive data not downloaded.

The manual sums it up -
 5.6. Archive download errors

Symptom: Real-time data is passing successfully from logger to computer, but attempts to download archive data are failing, either partially or completely.

Background: Davis loggers can all generate two quite distinct types of data: real-time data (sometimes called Loop data) and archive data.

The manual goes on to say -
5. No solution can be found

If even clearing the logger fails to fix the problem then this could be one of the rare instances where the logger has become faulty.

Before I ordered a new logger I wanted to check with the brains trust on the forum, done that, new logger ordered.
Pages: [1] 2 3 ... 10
anything