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Showing posts from October 27, 2018

23cm Transverter

My 23cm dish plus transverter  is now down  for revision

                                                              this XVTR box is at the dish the feeder tube enters top left to                                                                  connect the relay as direct as possible
                                                          The new SKY67151 LNA just fits in next to the relay
replacing the SPF5189z

                the SWR d-coupler say 1:1  with this combination
                                         these Chinese eBay connectors  can not be used for 23cm 1300MHz
                                    it will result in high SWR and lower output and possible instability

My transverter is a modified DB6NT  + 30W PA
And SPF5189z preamp 0.73db nf this worked very well
F.i.  in oktober  test OM3KII was worked 916km  in mostly flat propagation!
But  some issues self oscillating reduced total gain bad TX matching, interfering 900MHz 4G
Cooling is insufficient for long tx-ing…