I see that few of you are having problems with Sr9 and extreme cold temperatures. After some investigating on our end, we have found the problem with some Sr9’s.
We tracked down the source of the problem to a limited batch of Sr9’s that from our, manufacturing, did not have the correct temperature range for one of our crystals. Under normal conditions there will not be any noticeable performance effect, but when temperatures drop below -8C, you may experience cold related issues.
We have identified the problem and corrective actions have been taken.
This problem will only effect person’s under extreme cold temperatures.
If you feel you are experiencing Cold Temperature related issues, please contact mike@ubnt.com for further dialog.
I have not seen any that wont cold start at that temp, but thats not to say they aren’t out there. I know that if the card goes out, you do have to let it warm up to almost room temperature to get it back, but that was in the extreme case. Most are just below -5c that are having the problems.
Other then warmer temps/heater solution a replacement of the bad card is the only option.
There is also the issue of windchill, if the ambient temp is 40f and teh windchil is say 30f or lower you would possibly experience problems, also with condensation that will also lower the temp combined with wind chill.
In practice, the higher the wind, the more of a chilling effect you will get on an outdoor metal or plastic enclosure.
It will never get colder than ambient, but it can lose more heat in a windy environment than it would in a calm setting exaggerating any temperature related effects.
I’m thrilled that Ubiquiti is being so open and communicating so well about this problem. Its a marked contrast to other vendors.
if you set up a vent (better a turbine as you will need high wind speed) you can get temperature down from ambient temperature just by blowing with ambient air current.
I’d really like to know more about problems this issue actually causes. From the description it sounds like this could cause an RF tuning skew, which could be a HUGE problem if it occurs on the TX side.
My tower sits about 2 miles from a Verizon 800B CDMA/AMPS tower, and 5 miles from a Cingular 800A GSM tower… I’d rather not anger my better-funded spectral co-habitants. We saw how angering Verizon worked out for Vonage…
Details are king. This product is available to the public, please make the information available to all your users. I personally love the SR9 and I’d like to be able to keep loving it…
