Poor Transmit Audio USB

[Alex & La Nell]

        I have a K3/100 ser. # 1485 that has very thin audio, my first guess
is that the filter went bad or is very far off original freq. On upper
sideband it has only highs and sounds very restricted (pinched) tried
adjusting the transmit BW settings. On lower ssb my close friends state it
sounds ok, but not great like the old ts 2000 sounded like. The audio is so
restricted that it is very difficult for someone to understand what you're
saying.

        Will call factory on Monday morning and see what they say, in the
mean time anyone else have this kind of problem. ?

Thanks
Alex kr6g

Alex and La Nell Alexander
Alexander Enterprises
Quincy, Ca 95971
530-281-6411
 

 

__________ Information from ESET NOD32 Antivirus, version of virus signature
database 4152 (20090612) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
 

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Joe Subich, W4TV-4]

Do you have the 8 pole or 5 pole filter?  Have you updated
firmware recently?   I'd bet you have a 5-pole roofing filter
and the offset is not correct (set to zero or even has the
wrong sign).  

The five pole filter offset is on the label on the side of
the filter (if you can see it).  If you have a kit-built
unit, you should have recorded the filter offset in the
manual as part of the build process.  

73,

   ... Joe, W4TV
   

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Alex & La Nell
> Sent: Saturday, June 13, 2009 5:38 PM
> To: [hidden email]
> Subject: [Elecraft] Poor Transmit Audio USB
>
>
> I have a K3/100 ser. # 1485 that has very thin audio,
> my first guess is that the filter went bad or is very far off
> original freq. On upper sideband it has only highs and sounds
> very restricted (pinched) tried adjusting the transmit BW
> settings. On lower ssb my close friends state it sounds ok,
> but not great like the old ts 2000 sounded like. The audio is
> so restricted that it is very difficult for someone to
> understand what you're saying.
>
> Will call factory on Monday morning and see what they
> say, in the mean time anyone else have this kind of problem. ?
>
> Thanks
> Alex kr6g
>
> Alex and La Nell Alexander
> Alexander Enterprises
> Quincy, Ca 95971
> 530-281-6411
>  

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Don Wilhelm-4]

Alex,

I had a K3 that displayed similar symptoms.  It was 'cured' by re-doing
the CONFIG: CAL REF.
Check the manual Calibration procedures and find "Reference Oscillator"
- Use Method 2.  Even if you have the 1ppm TCXO, use that method -
Method 3 is not yet implemented in firmware.

73,
Don W3FPR

Alex & La Nell wrote:

> I have a K3/100 ser. # 1485 that has very thin audio, my first guess
> is that the filter went bad or is very far off original freq. On upper
> sideband it has only highs and sounds very restricted (pinched) tried
> adjusting the transmit BW settings. On lower ssb my close friends state it
> sounds ok, but not great like the old ts 2000 sounded like. The audio is so
> restricted that it is very difficult for someone to understand what you're
> saying.
>
> Will call factory on Monday morning and see what they say, in the
> mean time anyone else have this kind of problem. ?
>
> Thanks
> Alex kr6g
>
> Alex and La Nell Alexander
> Alexander Enterprises
> Quincy, Ca 95971
> 530-281-6411
>  
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Mike Scott-7]

I have had a pinched audio problem similar to the issue you mention.
Recycling the power cured it for me in the past. I have the 5 pole stock 2.7
KHz filter with proper offset. I never attempted to redo the reference
oscillator.
The issue usually came up for me right after downloading new firmware. My
pinched audio has not returned for months but was quite common maybe six
months ago.

Mike Scott - AE6WA
Tarzana, CA (DM04 / near LA)
NAQCC 3535
K3-100 #508 / KX1  #1311


        I have a K3/100 ser. # 1485 that has very thin audio, my first guess
is that the filter went bad or is very far off original freq. On upper
sideband it has only highs and sounds very restricted (pinched) tried
adjusting the transmit BW settings. On lower ssb my close friends state it
sounds ok, but not great like the old ts 2000 sounded like. The audio is so
restricted that it is very difficult for someone to understand what you're
saying.

        Will call factory on Monday morning and see what they say, in the
mean time anyone else have this kind of problem. ?

Thanks
Alex kr6g



______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html