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Message: <blockquote data-quote="Channel Hopper" data-source="post: 1031786" data-attributes="member: 175144">The offset comment was for S-band, who I recall was using a dedicated Prodelin offset in 'out of the box' vertical configuration (and I think a circular scalar feed). Reception at his location could be improved with turning the reflector on its side and upgrading the feed to an elliptical type.I was talking about the bus being the same  - virtually -  for both 1L and 1KR which would include the TTCandR including the kit that provides the beacon frequency via its own high gain antenna (though I would have to check through old notes if this has changed with 'modern' communications satellites) . But yes the payload is the bit that includes the profitable part and reason for putting them up there, the communication antenna(s) and the repeaters/transponders.</blockquote>