[ARC5] Increasing selectivity - another suggestion.

[Bruce Long]

Another wild idea
Inductive coil-to-coil coupling has the 180 degrees phase shift with respect to capacitive coil-to-coil coupling.  So in principal it is possible to reduce the net coupling by adding a small amount of capacitive coupling to a pair of inductively coupled coils.  I've see this mentioned in 1930's era radio design handbooks.





On Thursday, March 6, 2014 10:36 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
 
A good friend suggested that inserting a shield of some sort between the two 
coils in the IF can will also reduce the coupling. This might be easier than 
manually separating them.

Further research is necessary.

Kenneth G. Gordon W7EKB

"Courage is being scared to death but saddling up anyway."--- John   Wayne

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