Heres the "subjective" specs direct from the manufactures
Ranger 2980wx
AM / CW: 0.7 µV for 10 db SINAD - Not as good as the 148
SSB .2 uv for 10db SINAD - About the Same as the 148
Spurious Emission - More Than 60 dB - Better than the 148
IF Rejection More than 80 db at 455 KHz Not nearly as good as the 148
Carrier Suppression More than 60db Better than the 148
No AGC Spec given
Image Rejection - "More than" 50db - This sucks the 148 is way better
Skirt Selectivity
AM / FM Selectivity - 50 db at 10 KHz - No 6db figure given -148 better
SSB Selectivity - 5 db at 2 KHz, 60 db at 4 KHz - Sloppy, Sloppy, Sloppy
Cobra 148
AM 0.5uV for 10 db SINAD
SSB 0.25 uV for 10 db SINAD
Spurious Emission - -55bd
IF Rejection - 100db @ 455khz
AGC - Less than 10db change in audio output from 5uv to 50,000uv.
Image Rejection - 75db
Selectivity
AM: 6dB @ 3 KHz, 50 dB @ 9 KHz.
SSB: 6 dB @ 1.1 KHz, 60 dB @ 2.3 KHz
The 2980 vs 148 - What kills me is the image rejection and skirt selectivity. This is why I am weary of an export. Most of them have these very same specs or similar. But the price tag aint nearly the same.
It appears to be true that the freq counters in many exports is reading only one of the signals in the radio, that seems to leave alot of room for an inaccurate reading.
