Getting Ready for Winter

[administrator]

Trying different bulbs next.

News Flash...Major Duluth fire starts in rain gauge 

[MNflyer]

 

Fire put out by falling snow that light bulbs turned into water. All ok for now.

Weather_NC are you making one? The Radio Shack remote reciver is in the bedroom so I can keep track of the max/ min (it has mem) and real outside temp closely.

In Duluth we are about 10-15 degrees above normal (25-35 ABOVE) which is record setting with no sun for now 14 days (I hope the Davis battery works a few more weeks). I turned off the bulbs today to watch how the humitiy reads with bulbs on and off. Over the whole day no change. More later, Loren

[administrator]

In Duluth we are about 10-15 degrees above normal (25-35 ABOVE) which is record setting with no sun for now 14 days (I hope the Davis battery works a few more weeks). I turned off the bulbs today to watch how the humitiy reads with bulbs on and off.

It will cool down after those huge bulbs have been turned off for a while

[weather_nc]

Fire put out by falling snow that light bulbs turned into water. All ok for now.

Weather_NC are you making one?

With the heat wave we seem to be having in these parts, there's been no need to.  The Thermal switches arrived (boy, are they small - size of a dime).  I have to test one and I think we have weather that's supposed to drop to the upper 20's this weekend (been in the mid 60's this week so far) so I will test the switches.....

[looney2ns]

Was anymore done on this?
I would think the parts used in the Davis Rain heater could be purchased for much less than they charge.
What is the part number of that wire wound resister that Davis uses?

[niko]

The Davis heater is 24 volts, 24 watts.  Power in watts = (current in amps)² * resistance in ohms (or volts * amps), so Davis uses a total of 24 ohms, but watt resistance you need depends on watt voltage you have available. If you used a regular landscape lighting transformer, those are usually 12 volts so you would need only 6 ohms to have a 24 watt heater. Note that Davis also lines the cone with aluminized bubble wrap insulation that you can get at the hardware store.

You must over design the resistors, if you get a 24 watt resistor and run it at 24 watts it will get so hot it will most likely unsolder itself, so aim for parts rated for at least twice the wattage that you will be actually running them at. 

Your choices are probably limited for the power resistors that are available, so be prepared to combine what you can get in series or parallel to achieve the desired power/ resistance.

[aardvark]

you know you could always skip the electrical transition to the hereafter  and buy the KAP.

The below URL.,  scroll toward the bottom.  YOu can see  it on my old WMII but it also fits on the Vantage pro series.    I don't sell them, but I have had one for many years now and it goes on pretty well and comes off easier and I have had no problems with my UV/Solar sensors as well.   

http://home.mchsi.com/~dsmweather/resources.htm