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Let me clarify.  "High Noise floor" is a misnomer.  The radio's "appear" to have a high noise floor due to a S meter calibration issue that started somewhere after your low # 176022258 radio and before 176022258~380.  The sensitivity is fine, on par or better than my other radios. Just the S meter is showing 4 S units higher on a -121 dBm signal.


The radio I got was used and someone had changed Service Menu settings for TX. All of the TX related settings Power, Mod, ALC, etc. were cranked to 255.  So I can't use my radio for "Default SM settings".


Having said that, I highly doubt they changed the S Meter settings.  My RSG is at 87 (the higher the #, the less sensitive).  I don't know if they changed it from 86 or if it came that way.