[TowerTalk] Home Weather Station

[Patrick Greenlee]

I have two each Davis Vantage Pro II indoor stations linked by RF to the 
outside WX equipment which is pretty much "Full Boat" with Temp, 
humidity, evapotranspiration, UV index, insolation (strength of 
sunlight), wind speed, wind direction, rain rate and accumulation, and 
on and on.  It has internal battery backup and two solar PV panels, one 
to run the electronics and one to power the fan that continually runs to 
cool the unit when the sun provides power.

The unit stores and can graph all the data by day, month or year.

I can not detect any RFI from the unit nor do my transmissions interfere 
with it. I'm good up to 1200 Watts P-P and another 300 is not likely to 
suddenly make a big difference given the small dB of change. I currently 
use a Hy-Gain Hy-Tower multi band vertical (about 52 ft tall mounted top 
a metal barn about 20 ft AGL) Second antenna is 90 by 180 Carolina 
windom. No problems for the shack or the WX station.  Not the cheapest 
WX box and not the easiest or cheapest to connect to the WX underground 
but a good solid performer.

Patrick       NJ5G


On 6/14/2017 12:31 PM, Jim Brown wrote:
> On Wed,6/14/2017 7:14 AM, GALE STEWARD via TowerTalk wrote:
>> I'm considering a home weather station for in the radio room. This 
>> thread has been discussed before (?) but I wasn't interested at that 
>> time.
>> Obviously this unit would need to work in an environment of a legal 
>> limit station.
>> I am thinking that I would prefer a wireless system but I could do 
>> wired if necessary.
> Wireless products like this run at VHF, typically around 300 MHz, but 
> can also run higher. Most QRM to/from such systems are coupled by 
> WIRING connected to sources and victims. This is especially true at MF 
> and HF. Thus, a system with no wires is FAR less likely to be a source 
> or victim for operation below about 60 MHz. For most wireless systems, 
> the only wiring is the power supply, and that ought to be choked 
> anyway to prevent RF noise on the ham bands if that PSU is a 
> switch-mode supply (as most are). If that choke is "right" for noise, 
> it will also "right" for interference from the ham station to the unit.
>
> I have two different inexpensive wireless WX stations (about $30 from 
> Costco), one for the house and another for the shack. No QRM at all. I 
> run legal limit 160-10M, 550W on 6M. Specific recommendations for 
> chokes are in http://k9yc.com/KillingReceiveNoise.pdf
>
> 73, Jim K9YC
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