> How much trouble is there in tuning a duplexer? > I'm not equipped, at present, with a lot of test equipment.
If you purchase a new duplexer from a manufacturer such as TX-RX you can provide them with the transmit and receive frequencies and they will tune it up for you. If you can't get a coordinated frequency before you receive the duplexer - you could see if they would be willing to ship it to you pre-tuned on an uncoordinated test pair (ask your local spectrum management group what to use - most have one or more repeater pairs for testing, etc.) ... and see if you can send it back to be re-tuned for your final frequencies when you receive them. I've sent equipment back to TX-RX ... we upgraded a 23cm duplexer to be a tri-plexer (to support D-STAR digital voice and high speed data) and they were really good about retuning, new phasing lines, etc. Bob W1QA
