10GHz Circular polarization feeds.

NO TUNE Circular polarized dish feeds. Simple and easy to build feeder for parabolic dishes that produce circular polarization within 0.5dB of circularity without need for circularity calibration or adjustment.
The full article (as published in Dubus 33-2/2006)that includes the design for -metric size tubbing-
The additional plans for -imperial size tubbing schedule M-
and the plans for -imperial size tubbing schedule K-
On the left pictures of a prototype by Willi Bauer LX1DB

5.7GHz Circular polarization feeds.

NO TUNE Circular polarized dish feed. Using imperial tube sizes.
Based on the 10GHz design but resized for 5.7GHz by VE1ALQ. - 5.7GHz with imperial size tubbing 39mm -

8.4 GHz Filter for DSN rx.

A simple and easy to build filter for the 8.4GHz DSN band.
The diagram his here, "dsnxbandfilter_01.pdf"
On the left the measured performance of a filter with 16mm section separation
constructed and tested by Achim Vollhardt DH2VA based on the present design.

Any comments: Luis Cupido