I see that several people recommended using a network analyzer or spectrum analyzer + tracking generator. I too am a great believer in using the right equipment for the job, but in the olden days, before these instruments were available in the field, we got our duplexers tuned with available equipment.
My recommendation would be to decide what's important. For some people, just getting the machine up is where it's at. Maybe sending the duplexer to TX-RX makes sense. On the other hand, if a learning experience is desired, the internet awaits. There is much useful info on Kevin's site @: http://www.repeater-builder.com/rbtip/ant-sys-index.html#duplexers Also look at: http://www.seits.org/duplexer/duplexer.pdf Once an understanding of duplexer operation and alignment theory is obtained, the decision can be made as to whether sufficient accuracy can be obtained with available instrumentation. Using a basic signal generator and a tuneable indicator [for example a receiver with S meter like an Icom R7000] can deliver acceptable results, particulary if proper techniques are employed using double shielded cables, matching attenuator pads, etc. Response vs. frequency can still be plotted point by point, just like in the old days. Doing it that way is not only a learning experience, it makes you appreciate modern instrumentation! Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
