[Elecraft] K3 DSP LPF daughterboard - What is an artifact and where can you find them?

[Brendan Minish]

Don Rasmussen wrote:

> I applaude Elecraft for going to all the trouble and expense of
> engineering a daughterboard for this, and maintain once again that to
> my ears, K3 is the only IF DSP transceiver that sounds analog. 

For those of us with good hearing to 12KHz and above really appreciate 
that elecraft have taken the time to understand the relativity subtle 
issue that some of us were hearing, create a mod to add the LPF and that 
this is now standard.
Not everyone can hear the issue, or will be bothered by it, it's quite 
subtle but it was certainly fateuging to some of us who can hear well at 
higher frequencies. I had initially added an R/C Low pass filter to my 
headphone ear pieces which worked but the LPF mod does a better job, I 
was one of the beta testers for it.


Incidentally the D to A chip in the K3 is performing well within it's 
design specs for aliasing products, I have a portabe MP3 player that is 
nearly unusable to my ears for listening to practice CW stored as MP3 
files with a bit rate of 12Khz (You can get a lot of hours of Ebooks 
converted to CW at lower sapmle rates)

73
Brendan EI6IZ