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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