[Elecraft] Audio Nulling in my K3 in Diversity

[Dave Anderson, K4SV]

Hi All,

For the last few weeks I have used the Diversity on the low bands with good 
success.  

Tonight I came into the shack and found my K3 acting strange.  While in 
diversity, 4SQ hooked to main RX antenna port and Beverages hook to AUX port, 
the same configuration I had for weeks.  As I tune the band, the audio nulls 
out 

about every 0.5KHz where the audio gets very low.  The S meter seems unchanged, 
only the audio is affected.  I switched back to Normal receive and sounds fine. 
 Then back into Diversity and I get this nulling of the audio again.  Sounds as 
if a 
Auto notch was enabled, buts its OFF.

The radio has been left for three weeks continuously.  I recycled power without 
change.  I am running the latest MCU 4.22 / DSP 2.70 / FPF 1.14, 11-15-2010

I could speculate what it might but I bet this has been seen before.  Maybe a 
operator thing but nothing was changed in the radio from the last time I used 
it 

and it worked fine.

Suggestions?

Thanks in advance,
 
Dave Anderson, K4SV
Tryon, NC

 
www.K4SV.com
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[Elecraft] Audio Nulling in my K3 in Diversity Update = Solved

[Dave Anderson, K4SV]

Hi Guy et All,

Sure enough this only happens using an external speaker, the headphones work 
fine.  Sorry for not seeing this earlier. 

I do have SPKRS set to 1.  So it appears that when using diversity one must 
use Stereo speaker output and or Headphones.

Mystery solved, Thanks for the quick answers

73

Dave Anderson, K4SV
Tryon, NC
828 777-5088

www.K4SV.com



- Original Message 
From: Guy Olinger K2AV olin...@bellsouth.net
To: Dave Anderson, K4SV davek...@yahoo.com
Sent: Wed, December 15, 2010 9:08:41 PM
Subject: Re: [Elecraft] Audio Nulling in my K3 in Diversity

The main ways of getting audio nulling on diversity are setting
CONFIG:SPKRS to 1, or having the left and right speakers actually
shorted out somehow, or getting one speaker cable to one speaker
flipped, and the other not.

Any of those?

73, Guy

On Wed, Dec 15, 2010 at 8:55 PM, Dave Anderson, K4SV davek...@yahoo.com wrote:
 Hi All,

 For the last few weeks I have used the Diversity on the low bands with good
 success.

 Tonight I came into the shack and found my K3 acting strange.  While in
 diversity, 4SQ hooked to main RX antenna port and Beverages hook to AUX port,
 the same configuration I had for weeks.  As I tune the band, the audio nulls 
out

 about every 0.5KHz where the audio gets very low.  The S meter seems 
unchanged,
 only the audio is affected.  I switched back to Normal receive and sounds 
fine.
  Then back into Diversity and I get this nulling of the audio again.  Sounds 
as
 if a
 Auto notch was enabled, buts its OFF.

 The radio has been left for three weeks continuously.  I recycled power 
without
 change.  I am running the latest MCU 4.22 / DSP 2.70 / FPF 1.14, 11-15-2010

 I could speculate what it might but I bet this has been seen before.  Maybe a
 operator thing but nothing was changed in the radio from the last time I used 
it

 and it worked fine.

 Suggestions?

 Thanks in advance,

 Dave Anderson, K4SV
 Tryon, NC


 www.K4SV.com
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 Elecraft mailing list
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 Please help support this email list: http://www.qsl.net/donate.html

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