Here is the email discussion i had with pac wireless, i asked for permision to place it on the forum, to clear things up....
> Thanks for the fast response...Comments below...
>> Subject: serious problem ?
>> its all about many people loosing wireless networkcards (mini-pci) type
>> Atheros in combination with a pac wireless 10 or 12db omni.
>> PW: Can you confirm the antenna models on these parts? We do not make a
>> 10dB omni antenna.
> advertisement for this antennas where sometimes 10 or 12db from different
> suppliers, antennas in real look all the same ( a 1Mtr long a 25mm thick,
> metal head )
> PW: Can you confirm that they have a metal head? Do you have a picture
> this antenna?
see attached pictures, for details antenna
PW: These antennas are not manufactured by us. Please see
our omni antenna spec sheet:
You will notice that our antennas are gray and do not have this type of cap
at the top. This appears to be an antenna that is made by Comet (although I
cannot confirm from the pictures). Does the antenna have a part # ?
( we have 12db versions , 1 in use in tower killed 7 radios ( CM9 )
( we have 12db vesions, 1 was in use killed 1 radio, antenna replaced by
other brand , working for 1 year now.
( we have 9db versions ( same model ) , 1 in use ( also killed a radio
within 3 months, replaced radio, working ok for 2 weeks now )
PW: See response above. These antennas are not made by us. Although even
though they are not made by us, I still think it is a sensitivity issue on
>> We too lost in a few weeks 7 CM9 mini-pci cards with 2 pac wireless 10
>> 12db omnis, never had this problem with other brand antenna.
>> PW: Have you used our omni antennas with other radios? If so, what have
>> your results been? We have thousands and thousands of these antennas
>> installed all over the world and have not had these issues. In fact this
>> the first time it has come up with any product.
> a college of mine use a couple with Senao AP, no problem there, he is
> planning to use CM9 radios/ Mikrotik routerboard on these omnis but waits
> for oure results regarding CM9/pac wireless (10/12db) omni.
> PW: OK thanks. The fact that they are working fine with one radio
> combination leads me to believe that it is a radio issue (just as someone
> else on the forum listed that it has happened with other omni antennas).
or the fact he has most of them on rooftops, only 1 on a tower
he told me he had disconnection problems when the where grounded, when
isolated problems disaspeared.
>> could you seriuos look into this , and give us some reply.
>> also i would like to know ( if the problem is realy related to pac
>> ) how about RMA, and what about oure broken CM9 cards.
>> PW: We can assure you that the antennas themselves are not the cause of
>> problem. An antenna is a passive device. Are these installations being
>> grounded? I think this comment helps sum up some of the problems(from
>> Mikrotik forum):
>> "As I said in another post my friend that had the problem solved it by
>> grounding the poll that every thing is connected to. Some people say that
>> they have all their equipment grounded but still loss the cards.
>> He is using PacWireless 9 and 12dbi omni's and after grounding has not
>> any cards."
>> Grounding is very important when it comes to protecting your equipment.
>> Another quote from the forum:
>> "I lost each of my cm9 only during stormy or rainy weather."
>> There were others that have said that they have experienced the same
>> with other omni antennas (different manufacturers). We have heard of a
>> number of CM9 failures. When we received this email from you, we
>> Wisp-Router (they distribute our antenna products and sell the CM9
>> and they informed us that they see more RMA's on the CM9's than any other
>> radio (because of their sensitivity).
>> Hope this helps.
> We tried (extra) grounding, isolate all equipment from ground, replace
> evrything ( pac wireless omni for a new pac wireless omni )
> you name it. and are run out of ideas, besides replacing omni for another
> brand just to try/confirm the problem regarding cm9/pac wireless omni.
Also other 2 CM9 cards at the tower newer died thats the strangest thing, so
if we got a grounding problem these should be died to i believe.
PW: Yeah, that is strange. I think it is a build of the radio.
> We have many omnis/sectors/panels all with CM9's (
> stella-doradus/terrant )
> in use for 3 years and never had this kind of problem, i believe you 200%
> that the omni is a passive device with "cant" destroy a CM9, also i DON'T
> say or believ Pac wireless make a bad product, but what if the combination
> of lenght/material in windy weather loads itselfs electrical like a
> capacitor and fries the CM9.
> We also have in mind that a bad series of CM9's "can" be the problem ( as
> the problem lately came up more on the forums )
> i made a webside to log these MAC numbers and will dive into that to.
> PW: I think this is more likely as there is more chance for error or bad
> parts on a card then there is on an antenna. If a chip has changed or
> other component has been changed...As mentioned, this is the radio that
> had the most problems as per one of our distributors. In fact they had a
> couple that they used in their own installation and had the problem with a
> directional antenna.
> i don't believe in stories on the web that a radios dies of to many
> radiotrafic in the air, we do have AP's running in citys for more than
> three years without any problem regarding dead CM9 cards.
> PW: Completely agree. I think it is a component issue.
We are waiting for new CM9's to arrive, when the arrive we will replace and
replace the antenna for an 8db Stella Doradus and give you some results
after a few days.
can you advise ?
should we bring back grounding to the routerboard/anetnna ?
PW: They should all be grounded. Please advise if you have any of the gray
antennas in use. These would be from us...