[Elecraft] K3 NR and KIO3B INTERFACE

[Bob McGraw K4TAX]

Could it be the AFX function is on?   This adds a bit of delay between L 
and R.     In using a pair of non-amplified external speakers connected 
to the rear SPKRS jack, I don't notice any objectionable echo when NR is 
engaged.   The setting which I use for SSB  is NRmF5--1.   This is mixed 
audio being part original audio and part being DSP audio.

73

Bob, K4TAX

K3S s/n 10163


On 7/14/2017 4:27 PM, Terry wrote:
> My K3S has sounded like that since I bought it.
> 73
> Terry N7BDL
>
> On 7/13/17 6:49 PM, Peter Pellack via Elecraft wrote:
>>    Last year we upgraded one of the K3's with the installation of the 
>> KIO3B interface kit. Shortly after we noticed that the NR sounded 
>> different. Like an "echo", even on the least aggressive setting. The 
>> NR performance appeared to have significantly suffered. Coincidence 
>> with the KIO3B installation ? We put the K3 on the shelf and used the 
>> backup K3 w/o the upgraded IO board.  Two months ago we upgraded the 
>> backup K3 with the KIO3B interface. Guess what, the same issue,the NR 
>> reduction has suffered the same symptoms as the 1st K3 ! What is 
>> going on here ? Tnx,73,Peter,HS0ZKX
>
>