[Elecraft] RES: K3 distortion

[py5eg]

Hi Folks
I do have 4 K3s and only shows exactly the same problem.
I think the support from Elecraft must say something about it
Oms PY5EG 


 

ATILANO DE OMS 
PP5EG - PY5EG - PY2OMS
ZW5B, PS2T, PT5T 
ARAUCARIA DX GROUP 


-----Mensagem original-----
De: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] Em nome de Rick Bates
Enviada em: sexta-feira, 5 de abril de 2013 12:54
Para: Dick, WN3R
Cc: elecraft at mailman.qth.net
Assunto: Re: [Elecraft] K3 distortion

A simple test for RFI is to compare audio while in the K3 test mode (no
rf is produced). 

If still bad, check the grounding and drive levels from the computer,
use the least at the computer side (using line out, not speaker) and let
the K3 manage the levels. 

Rick wa6nhc

Tiny iPhone 5 keypad, typos are inevitable

On Apr 5, 2013, at 6:03 AM, "Dick, WN3R" <wn3r.us at gmail.com> wrote:

>> 
>> I have two K3's. One has a problem.
> 
> When I turn on the line input and advance compression, the audio
becomes severally distorted. I am listening to the audio through the
monitor and watching the output power on an external power meter. It
might even sound like RF feedback. Without speaking into the mic output
levels can be 80 watts or more.
> 
> Turn off the line input and it all goes away. Audio is perfectly
clean.
> 
> I have completely isolated the radio to make sure it is a radio
problem only. Test setup was a fully charged battery, a Heil microphone,
headphones, and a dummy load. Absolutely no other connections.
> 
> Radio came back from Elecraft with no problem found,  but in all
fairness, I did not know at the time that turning off the line input
solved the problem. I discovered that by accident months later.
> 
> My solution is to connect the computer sound card throughout the front
mic connector as I did with other rigs. I'd like to be able to use the
rear audio connections again. 
> 
> Any ideas?
> 
> Thanks, Dick, WN3R
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