Hello, Was wondering if anyone happened to know whether there was a general rule of thumb regarding the minimum frequency seperation required between the high side and low side frequencies when retunning these for the 800 - 900mhz section of the band. The manufacturer has long since left the scene and the duplexer still functions reasonably well on its current split but i was wondering if there was some hard and fast rule before i contemplated sending it in for a retune to a new set of frequencies. All replies gratefully received.
regards,
