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Message: <blockquote data-quote="moonbase" data-source="post: 1133562" data-attributes="member: 178786">Agreed, these seems to have been quite a few changes to the channel line ups and signal levels.Oddly, at 8.0dB I am 1.4dB below a lock for your "troublesome" transponder from my supposedly favourable UK location, whereas you are 1.8dB over the lock level for 3834H, SR6500.My first fine tune experiment today resulted in a fine mess.I adjusted the scalar position along the feed barrel from 30mm along the barrel to 0mm on the barrel (flush with the feed rim aperture)Result - loss of 22 of the 27 frequencies previously locked !!It is not a disaster and loss of frequencies with tweaking is to be expected. I will try a few more scalar locations at this specific focal distance to see how things pan out.It does illustrate how fickle C-Band reception can be on these quirky satellites such as 38.0 East.</blockquote>