Static Electricity

OPTIMA · Post by **OPTIMA** » Sun Sep 08, 2002 4:23 pm

Hello to all CW-users from a new forummember!
Here's my problem, hope someone can help me.
I have a slotcooler between my 2 CWcards, and the produced airflow over the cards makes them loaded with static electricity.
It gives a loud "knack" sometimes.
Is there a solution to take off the static elec.?
Maybe connect the DSP-body's with the ground
or something like that?
I was thinking to make a kind of grounded shield around them but that's a little difficult.
Once i've seen a "anti-static"-spray in the electronic-shop, but i think it's a little dangerous to spray over my CWcards.
Really don't know what to do!

DJATWORK · Post by **DJATWORK** » Sun Sep 08, 2002 11:50 pm

Please BEWARE!!!!

we are talking about very expensive cards...please don´t experiment with them, in the name of (tech) love!!!

Its very dangerous making any invention or adding any stuff to the cards...you can´t be sure about you are not making a new static problem, or something...

Go for the simple thing... Good, if simple, twice good!!!

The best you can do is change the place where the cooler is. Think on this:
The cool air goes down, and the heat air goes Up.
You should have an Air-IN cooler in the bottom part, and an Air-OUT cooler in the Top of your gabinet. You can add as many as you want, but following that principle.
The fisics will do the rest, and air will flow by your machine...

DJATWORK

OPTIMA · Post by **OPTIMA** » Mon Sep 09, 2002 1:52 am

we are talking about very expensive cards...please don´t experiment with them, in the name of (tech) love!!!

Its very dangerous making any invention or adding any stuff to the cards...you can´t be sure about you are not making a new static problem, or something...

That's why i want some advice of other users. The thing is that my CWcards get really hot while in action, 60 to 70°C i think. Not so good for a long life!
Anyway, What's the normal temperature for the cards?

DJATWORK · Post by **DJATWORK** » Mon Sep 09, 2002 1:49 pm

How do you know about those 70 degrees?

In the manuals or the tech specs there should be that information, but I don´t know many people who has a cooler near to the CW card, and they don´t have any problem...

DJATWORK

OPTIMA · Post by **OPTIMA** » Mon Sep 09, 2002 3:59 pm

I don't know very shure about 60-70°C, it's only thinking. When my system is on, i can't hold my fingers against the DSP's because of the heat.
Thanks for your suggestion for the extra cooler, today i fitted one at the bottem to blow fresh air inside. It gives a better cooling around the CW-cards, buth no solution for the static problem. The next thing i'm gonna try is to let the coolers work a little slower. Regards!

Marc de Ruiter · Post by **Marc de Ruiter** » Tue Sep 10, 2002 3:25 am

The problem you discrebe could be a groundloop: A situation where the sheelding is grounded in more then one place, causing crackles, statical discharges or even distortion.
Solution: make sure only one device in the signal path (preamp, fx-units, computer or poweramp is grounded.
Hope this helps,

Marc

OPTIMA · Post by **OPTIMA** » Tue Sep 10, 2002 6:40 am

Hi Marc, i'm shure the static problem is caused by the airflow around my cards.
When i disconnect the cooler the crackles are gone. But then there's to much heat around the cards.
Thanks anyway for the tip! Regards from Belgium.

alfonso · Post by **alfonso** » Sun Sep 29, 2002 8:49 am

absolutely it can't be airflow.

consider the electric engine of the cooler. there is always a magnetic part in it.

personally i have 3 cards and 14 dsp, but with a well ventilated good case (search overclocker's stuff).

you don't need anything else.
do as djatwork says, and have more care when you handle your cards.

ciao.

<font size=-1>[ This Message was edited by: alfonso on 2002-09-29 09:58 ]</font>

Spirit · Post by **Spirit** » Sun Sep 29, 2002 9:13 am

Why are you touching your sharcs when the system is on anyway ? Is the case open ? Why is your environment so hot ? Are you in a hot room, no ventilation, in sunlight, stacked with other gear etc ?

acuario · Post by **acuario** » Sat Nov 02, 2002 3:14 pm

consider the electric engine of the cooler. there is always a magnetic part in it.

<font size=-1>[ This Message was edited by: alfonso on 2002-09-29 09:58 ]</font>

Perhaps it´s not static and it´s Foucalt parasite currents? UH!