eHam

eHam Forums => RFI / EMI => Topic started by: N0YK on June 03, 2013, 05:44:37 AM



Title: RFI Solution for the Davis Vantage Vue WX Station
Post by: N0YK on June 03, 2013, 05:44:37 AM
Hello All,

I've had a Davis Vantage Vue weather station in my backyard for a couple of years now. The Vue is near my 144/1296 MHz antenna's which I run fair amounts of power to. For the last two years, I'm been fighting RFI blitzing out the computer on the Vue. Now this isn't unexpected but does require a fair amount of effort to fix. The battery must be pulled from the Vue, then let it set overnight to drain the super capacitor and do a full power off reboot. Normally you lose at least 8-10 hours of data each time this happens. There is no way to get into the circuit to open the power form the capacitor since it's all enclosed in an epoxy. Quite a mess! I've had numerous calls into Davis, they were of no help on this issue. I knew it came down to poor shedding on the Vue, just wasn't sure if a fix was possible.

So, this weekend I finally decided enough is enough and tin foiled all the internal wires and around the main board.

Wallah! I pointed by yagi's at the weather station and directed the standard 5kW ERP at it. No effects. I'm relieved to have finally fixed this and wanted to share with the community in case anyone else is experiencing the same problems.

See modification here: http://tinypic.com/r/2r7uekw/5 (http://tinypic.com/r/2r7uekw/5)

Feel free to email me with any questions.

Chad
N0YK


Title: RE: RFI Solution for the Davis Vantage Vue WX Station
Post by: K1CJS on June 03, 2013, 07:10:13 AM
...I pointed by yagi's at the weather station and directed the standard 5kW ERP at it....

Standard 5kw??!?  What are you running, a commercial broadcast station?   ;D


Title: RE: RFI Solution for the Davis Vantage Vue WX Station
Post by: WB4SPT on June 03, 2013, 07:11:58 AM
Nice!  I take it this is a wireless device?  


Title: RE: RFI Solution for the Davis Vantage Vue WX Station
Post by: N0YK on June 03, 2013, 07:36:43 AM
Yes, the Vue operations on 900 Mhz I believe, 1000' range to console.

K1CJS - lol, funny stuff. Amazing what antenna gain (10dBd plus) and a little power can do for your Effective Radiated Power (ERP).


Title: RE: RFI Solution for the Davis Vantage Vue WX Station
Post by: K1CJS on June 04, 2013, 05:23:26 AM
Figured it was something like that, but the abbreviated way you stated it...  Well, I just couldn't resist!  73!


Title: RE: RFI Solution for the Davis Vantage Vue WX Station
Post by: K0JEG on June 04, 2013, 06:29:10 AM
Hello All,

I've had a Davis Vantage Vue weather station in my backyard for a couple of years now. The Vue is near my 144/1296 MHz antenna's which I run fair amounts of power to. For the last two years, I'm been fighting RFI blitzing out the computer on the Vue. Now this isn't unexpected but does require a fair amount of effort to fix. The battery must be pulled from the Vue, then let it set overnight to drain the super capacitor and do a full power off reboot. Normally you lose at least 8-10 hours of data each time this happens. There is no way to get into the circuit to open the power form the capacitor since it's all enclosed in an epoxy. Quite a mess! I've had numerous calls into Davis, they were of no help on this issue. I knew it came down to poor shedding on the Vue, just wasn't sure if a fix was possible.

So, this weekend I finally decided enough is enough and tin foiled all the internal wires and around the main board.

Wallah! I pointed by yagi's at the weather station and directed the standard 5kW ERP at it. No effects. I'm relieved to have finally fixed this and wanted to share with the community in case anyone else is experiencing the same problems.

See modification here: http://tinypic.com/r/2r7uekw/5 (http://tinypic.com/r/2r7uekw/5)

Feel free to email me with any questions.

Chad
N0YK

Nice inexpensive fix. I've also heard of people putting toroids on all the cables too. I just bought mine a few weeks ago. Hope to get it on APRS and do some Raspberry Pi hacking to make some remote displays too. Just need lots of time ;)


Title: RE: RFI Solution for the Davis Vantage Vue WX Station
Post by: N5GE on June 25, 2013, 08:05:30 AM
Thanks for that!

I will try it this week!