[TenTec] Orion II A9 Board Failure...Again!

[Ron Castro]

Whoops... that last link was:

http://n6ie.com/A9_Fix.html

         Ron  N6IE
      www.N6IE.com


----- Original Message ----- 
From: "Ron Castro" <ronc at sonic.net>
To: "Ten Tec List" <tentec at contesting.com>
Sent: Wednesday, June 25, 2008 10:35 AM
Subject: [TenTec] Orion II A9 Board Failure...Again!


> Hank:  Excellent analysis!  Can I please link to that from my page?
>
> I believe, based on this link that there is a direct connection between 
> ESR
> and ripple ratings:
>
> http://wiki.xtronics.com/index.php/Capacitors_and_ESR
>
> "Ripple Current Rating
> The ripple current is sometimes rated for a capacitor in RMS current.
> Remembering that P = I2R where R in this case is ESR it is plain to see 
> that
> this is a power dispassion rating. "
>
> Here is a link to the data sheet of the caps I used:
>
> http://www.mouser.com/catalog/specsheets/esrl.pdf
>
> I haven't figured out the calculations, but  the ripple rating is 1355 ma 
> @
> 100 kHz, 50 Volts, 105 C and a "life test" rating of 2,000 hours.  What 
> kind
> of life could I expect in the C6 application?
>
> BTW, I didn't test the caps I removed, but as you can see if you look
> carefully on the 'before' picture on my site, C9 has a bulge on the top of
> its casing.  TT never told me which caps they replaced the first time
> around.  Another interesting thing is that all three original caps were 
> the
> same specs, but all three were different sizes.
>
> http://n6ie.com/A9_Fix.
>
>         Ron N6IE
>      www.N6IE.com
>
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