On AM this has always been, at least on my unit SNR around 1500.
This K3 radio sure has a lot of artifacts.

/ SM2EKM
--------------------
Mike wrote:
> I noticed it in the AM broadcast band (.690), regardless of NR. There's 
> a tiny bit of it on the low end of 160M also. I'd describe it as if the 
> BW control had a pawl, or detent.
> #3539
> 
> Mike, NF4L
> 
> Elliott Lawrence wrote:
>> I installed the latest 3.44 firmware and the associated DSP firmware 
>> yesterday.  The install went without a problem although I am always a bit 
>> anxious at the completion bars slowly march across the screen!
>>
>> I've noticed with the NR engaged and the BW control being adjusted that the 
>> audio blanks as each step occurs (a popping sound). I don't remember that 
>> being there with my previous version 3.3.  The blanking does not occur with 
>> the NR off. It just smoothly changes the bandwidth.
>>
>> Does anyone else notice this condition?  Is it a function of the changes 
>> made to eliminate the audio screech? So far everything else seems to be 
>> functioning OK.
>>
>> 73
>> Elliott WA6TLA K3 S/N 3381 
>>
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> 
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