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Message: <blockquote data-quote="s-band" data-source="post: 1031873" data-attributes="member: 407744"><p>Very interesting, thanks. The circular polariser and feed look the same as the ones I have but with mine the OMT is within the ODU body. There is no filter to keep TX out of RX apart from a choke at the OMT/LNB transition and anything that may be inside the OMT. I have 2 different banded feeds, one for 19.2-20.2 (which I use down to 18.5) and the other 21.4-22. The only visible difference is that the lower frequency one has teeth around the inside of the circular WG to the feed horn. None of them have standard WG sized apertures nor to the guides within the ODU</p></blockquote><p></p>