[R-390] Mechanical filter tests?

[Bob Camp]

Hi

It does not sound wrong, but it may not be right.

The impedance these filters operate into is higher than the input  
impedance of most AC volt meters.

Bob


On Feb 17, 2007, at 10:31 AM, DJED1 at aol.com wrote:

> Well, I finished recapping and aligning my Amelco, and all looks  
> well with
> one exception.  I found that I have about 10 dB more loss through  
> the 16  KHz
> filter than the others.  Never noticed it before, because I never  
> use  that
> filter.  So I'm debating whether to try and replace the filter or  
> not-  it's a
> tight place to work, and I'm not sure what I've got as a spare.
> I've got one of the ATC IF chassis with filters, but I need some  
> guidance  on
> how to test the filter and what the results should be.  I did a  
> quick  setup,
> feeding the filter with a URM-25 and measuring the output with a high
> impedance AC meter.  It measures about 13 dB of insertion loss- is  
> that  about
> right?
> Thanks for any advice
> Ed  WB2LHI
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