When I have a PL-259 connector all the way in with the shell screwed all the way I can barely hear anything. The S-Meter doesn't move at all. However, when I unscrew the shell and remove the center pin part of the way I can hear signals normally. I have tested for a short between the center conductor of the SO-239 and the outer threaded part. There is no short according to my Ohmmeter. I open the rig up and removed the connector, the dialectric was as far as it could go. I re soldered and still the same thing. I'm not sure where to go from here except to send the radio in for servicing. Any suggestions? BTW, the 2/70cm connector works just fine. I also tested the power output on Wattmeter/Dummy Load that works fine. I have also used other coax cables for testing and still the same thing.