[R-390] Mechanical filter Alignment

Roger Ruszkowski flowertime01 at wmconnect.com
Sun May 26 17:47:03 EDT 2013


Gordon,

In the beginning there was no adjustment.
Some nice values were engineered and the
best cap values were installed.

Some one though service people did not have enough
to do and decided that caps to diddle were needed.
So trim caps were added. 

If your IF deck does not have them, then be blessed
and leave it alone. It is good as it gets.


You just can not add them in.
They are not needed.

Besides the caps do not align the filters at all.
They just get a bit better or not better impedance
match in and out of the filter for more of less
signal level passed through the filter.

The Idea was not to align the filter.
The idea was to adjust the four filters for the
same relative power level. And this was not
necessarily the maximum power through any of
the filters.

Roger AI4NI



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