Different antenna for MB Pro Red with Davis stations

This section covers the Meteobridge PRO units exclusively

Moderator: Mattk

Post Reply
WS Heinenoord
Fresh Boarder
Fresh Boarder
Posts: 9
Joined: Sun Dec 22, 2019 2:08 pm

Different antenna for MB Pro Red with Davis stations

Post by WS Heinenoord »

On several fora one can read the direct reception of Davis stations using the MB Pro Red is not as good as the Davis console or the Envoy's are doing.
My Pro Red is no exception, signals from the ISS and 3 more stations at 20 to 30 meters frequently go down to -95 dB, while there's only a half-brick wall in between. Realizing the standard Pro Red antenna's are short, I ordered a 17 cm long 868 - 915 MHz Antenna, claiming 5dbi. meaning antenna length is now 4x the original. The MB Wiki Tutorial for the Pro Red is telling not to expect much from such change.
Attached are three plots showing the impact of the antenna change at 11:02 h.
ISS signal.PNG
ISS signal.PNG (44.67 KiB) Viewed 41 times
TH2 signal.PNG
TH2 signal.PNG (43.21 KiB) Viewed 41 times
LS10-50 signal.PNG
LS10-50 signal.PNG (51.57 KiB) Viewed 41 times
So far the effects are obvious, the reception appears much more stable, with less drops to -95 dB. Remarkably we see a clear improvement for the ISS which is at largest distance while a nearby Leaf/Soil station (nr 50) is not changing that much.

I also ran into WIFI connection issues one day, with the Pro reporting it had difficulties to connect. Here I changed the WIFI antenna to a double length one from a PC WIFI card. Also better dB numbers now, but not documented. This was done together with changing WIFI channel, so no clear antenna impact.

So far so good or it must be the weather is changing :)

User avatar
ConligWX
Gold Boarder
Gold Boarder
Posts: 238
Joined: Wed Nov 14, 2018 12:48 pm
Location: Conlig, Co. Down, UK
Contact:

Re: Different antenna for MB Pro Red with Davis stations

Post by ConligWX »

That's a good result for you!

Post Reply