Dan,
My guess is that the duplexer tuning was disturbed when you took it apart.
Most likely, the notch for the RX frequency on the TX side is not exactly
tuned to notch out the TX carrier, leading to major desense of the RX.
Unless you have a network analyzer, or a good spectrum analyzer with
Well now---
I've got two 2 meter Phelps-Dodge duplexers that tune beautifully but are
unusable in duplex service do to receiver desense-internal microarcs
between failed silver plated movable and fixed parts of the center element in a
couple of the cavities of each.
Also, some time ago,
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