[Elecraft] K3S vs. K3

[Phil Wheeler]

 From the FAQ it appears that you will be able 
"later this year" to replace the K3's Main DSP 
Board with one for the K3S to achieve better audio:

http://www.elecraft.com/manual/K3S-FAQ%20rev%20C5%20customer.pdf

Phil W7OX

On 5/16/15 9:17 AM, Doug Person via Elecraft wrote:
> Do you think the K3 audio is as good as it can 
> get or do you think that there are some possible 
> mods that might smooth it out a little? The K3 
> audio is good, but after spending a year on 
> another top-end rig, I can really hear a 
> difference.  Probably the only issue I have with 
> the K3.
>
> 73, Doug -- K0DXV
>
> On 05/16/2015 09:53 AM, Jim Brown wrote:
>> On Sat,5/16/2015 6:33 AM, Mike Harris wrote:
>>> Sherwood has previously commented unfavourably 
>>> on the audio quality of the LINE OUT signal. 
>>> This has lead to the general acceptance that 
>>> the LINE OUT level should be limited to 8-10. 
>>
>> This is pretty ancient history, and is the 
>> result of a digital guy trying to design an 
>> audio output stage. The error was in 1) using 
>> an unshielded telecom transformer and 2) adding 
>> 600 ohms in series between the output device 
>> and that transformer. In the world of audio, 
>> that's well known to cause distortion. 3) 600 
>> ohm inputs and outputs have not been used in 
>> pro audio for more than 40 years, another goof.
>>
>> I noticed the problem as soon as I got my first 
>> K3, measured it, and showed it around. I don't 
>> know if that was before or after Rob found it.
>>
>> If I'm not mistaken, the resistors were removed 
>> a LONG time ago, which, when placed as they 
>> were, caused the distortion.
>>
>> 73, Jim K9YC