[R-390] Re: [Collins] R-390A Filters

[Buzz]

Here's a postmortem on one of my filters.
http://webs.lanset.com/buzz/misc/filter/390Afilter.html


Buzz



On Thu, 09 Dec 2004 11:38:26 -0500, you wrote:
>After multiple tests I determined that my 4 KHZ filter was shot.  With 
>nothing to loose I decided to open it up and I think I found a cause for 
>the failure.  The input and output terminals a shunted with a 20 pf mica 
>and a 200K resistor.  They were fine.  What wasn't fine was the filter 
>itself.  It had separated into two pieces between the resonating discs 
>and another one of the spot welds was half broken.