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

[Keith Hamilton]

I would imagine there are a lot of us who hear the "artifacts" but just don't 
realize it? This would account for the undefinable  "fatigue" some talk about.

Keith W8GX




On Jan 2, 2010, at 9:21 PM, Brendan Minish wrote:

> 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
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