Regarding my K3 (original): DSP reduces the volume. When you turn the
volume up to where you can again hear - the junk noise level is right
back up there also.
A couple of days ago we had a major wind storm and a power line down the
road was periodically arcing. It was uncomfortable to listen to (on LSB
75 meters). I was using my Icom 7300 and pushed the NR button. Amazing,
the noises were reduced to nearly nothing and the audio level remained
as it had been. Then I switched to the K3 and tried the Noise Reduction
- no joy. I tried various settings, all under water and reduced volume.
I went back to the 7300 and continued enjoying my armchair copy 75 meter
QSO. Oh yes, I do know about reducing RX gain and proper use of ATT.
Sure, the argument can be made that the 7300 is a newer rig. You can
also argue that the DSP can be updated via software for the K3.
Sadly, since I purchased my IC-7300, I have only used the K3 for a few
CW contacts. Understand, my ham radio activities are 99% LSB on
160/75/40 meters. I do not DX or contest. No external VFO or keypad for
the 7300,which I do miss. However,a plastic stylus does wonderful on the
touch screen.
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