[amsat-bb] HFSAT Duplexer design welcome

Robert Bruninga bruninga at usna.edu
Mon Oct 3 22:57:41 UTC 2016

HFSAT Duplexer design welcome,

If anyone wants to take a shot at designing an HF Duplexer so that the
single 29 MHz dipole can also be shared with the 21 MHz uplink, here is the
schematic (maybe):  http://aprs.org/hfsat/HF-duplexer-a.png

It is my guess at how to build a trap and pass band on each side of the
duplexer.  But then I am not an RF designer at that level.

The overall web page for HFSAT is: http://aprs.org/hfsat.html


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