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  View original topic: AFM capacitor
coldwater_diver Tue Nov 18, 2008 9:08 pm

OK, well I have taken to trying to fix my AFM for my 88 Westy.
I have read on countless sites that I need a 15 volt 22 microfarrad tantalum capacitor or a 25 volt will work too.
Where the heck can I order one?
I live i the boonies of Colorado Radio Shack is the closest to an electronics store I have and the high school drop out working there just looked at me with a blank look on his face.
Help where can I get 1 maybe 2 for back up??
thanks

Scott Novak Wed Nov 19, 2008 12:00 am

What is the application? Is this a timing capacitor or is it used for filtering?

Do you know if you need a wet or solid tatntalum capacitor?

Do you need a cap with leads on it or are you looking for a surface mount cap?

You had better look at the temperature deratings as well. A 25 volt rated cap is derated to only 15 volts at 125 degrees C

You may actually want to use a 35 V cap so that it is rated for 23 volts at 125 degrees C.

Try Digi-Key.
http://www.digikey.com/

Capacitor section of their catalog page 109.
http://pdfcatalog.digikey.com/T083/SectF.pdf

Scott Novak

Alexander_Monday Wed Nov 19, 2008 5:28 am

When selecting capacitors it is standard practice to select one with 2X the voltage rating it will encounter. As Scott said, apply the derating also.

coldwater_diver Wed Nov 19, 2008 7:23 pm

Thanks for the info guys. I just ordered 10 from digikey. I hope I only need 1 but now I can pass them out to folks who need them too!
again thanks



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