Re: [Elecraft] K3 Strange noise

2008-10-08 Thread Gill W4RYW



n4lq wrote:
 
  With the antenna disconnected, it disappears. It can be heard 
 in any mode. I can swing the manual notch across the spectrum and it 
 disappears when set to about 360HZ.
 
 
 

No antenna no noise - you have something nearby radiating the noise. 360Hz
is the 6th harmonic of the AC power line. Put the rig in the AM mode and
tune up from the broadcast band looking for peaks in noise. It will likely
sound like a buzz on AM, not like what you are hearing but it will be the
main source of what you hear. You will probably find some really strong ones
in the lower freq ranges - then pick one that is loudest and switch off each
breaker in your electrical panel until it goes away - of it does, look for
what is connected to that circuit. If it doesn't, you have a noise source
outside your home. 

Good luck.

Gill W4RYW
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Re: [Elecraft] K3 Strange noise

2008-10-07 Thread Lee Buller

Steve

Do you have a switching power supply?  Is there one near it?

Lee - K0WA


In our day and age it seems that Common Sense is in short supply.  If you don't 
have any Common Sense - get some Common Sense and use it.  If you can't find 
any Common Sense, ask for help from somebody who has some Common Sense.  Is 
Common Sense divine?

--- On Mon, 10/6/08, n4lq [EMAIL PROTECTED] wrote:
From: n4lq [EMAIL PROTECTED]
Subject: [Elecraft] K3 Strange noise
To: Elecraft@mailman.qth.net
Date: Monday, October 6, 2008, 6:45 PM

Recently I've been hearing a strange noise. I've installed the latest FW

2.46 but I'm not sure when this started.
It's only audible from an external speaker and cannot be heard through the 
front headphone jack.
The noise is a random, pulsating tone of about 360Hz and sounds a bit like 
RTTY but only one tone. It follows the band noise. It shows up on any band, 
any frequency. With the antenna disconnected, it disappears. It can be heard 
in any mode. I can swing the manual notch across the spectrum and it 
disappears when set to about 360HZ.

Please someone check for this.
Settings:
1. Antenna connected
2. Tune to any band, any mode.
3. Do not tune in a signal.
4. Must use an external speaker plugged into rear jack.
5. Fitler opened wide.
6. Listen closley under the band noise for low pitch, pulsating tone around 
320 to 400 hz.

Let me know if you hear anything like this. Thanks.


Steve Ellington
[EMAIL PROTECTED] 

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Re: [Elecraft] K3 Strange noise

2008-10-07 Thread drewko
On Mon, 06 Oct 2008 19:45:01 -0400, Steve Ellington wrote:

Recently I've been hearing a strange noise. I've installed the latest FW 
2.46 but I'm not sure when this started.
It's only audible from an external speaker and cannot be heard through the 
front headphone jack.


Is your AFX on? I think that can produce weird results through a mono
speaker.

73,
Drew
AF2Z

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Re: [Elecraft] K3 Strange noise

2008-10-07 Thread Ken K3IU

G'morning, Steve:

I set my K3 up as you specified, listening on 20(nothing but noise at 
this hour) and hear nothing like you describe. Nothing showing up on 
Spectrogram, either.


73,
Ken K3IU
K3 #202

n4lq wrote:
Recently I've been hearing a strange noise. I've installed the latest 
FW 2.46 but I'm not sure when this started.
It's only audible from an external speaker and cannot be heard through 
the front headphone jack.
The noise is a random, pulsating tone of about 360Hz and sounds a bit 
like RTTY but only one tone. It follows the band noise. It shows up on 
any band, any frequency. With the antenna disconnected, it disappears. 
It can be heard in any mode. I can swing the manual notch across the 
spectrum and it disappears when set to about 360HZ.


Please someone check for this.
Settings:
1. Antenna connected
2. Tune to any band, any mode.
3. Do not tune in a signal.
4. Must use an external speaker plugged into rear jack.
5. Fitler opened wide.
6. Listen closley under the band noise for low pitch, pulsating tone 
around 320 to 400 hz.


Let me know if you hear anything like this. Thanks.


Steve Ellington
[EMAIL PROTECTED]
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[Elecraft] K3: Strange Noise

2008-10-07 Thread Mike

Nothing similar here on #0215 with FW 2.38/1.90 Steve.

73 de Mike, zl1mh.
No virus found in this outgoing message.
Checked by AVG - http://www.avg.com
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[Elecraft] K3 Strange noise

2008-10-06 Thread n4lq
Recently I've been hearing a strange noise. I've installed the latest FW 
2.46 but I'm not sure when this started.
It's only audible from an external speaker and cannot be heard through the 
front headphone jack.
The noise is a random, pulsating tone of about 360Hz and sounds a bit like 
RTTY but only one tone. It follows the band noise. It shows up on any band, 
any frequency. With the antenna disconnected, it disappears. It can be heard 
in any mode. I can swing the manual notch across the spectrum and it 
disappears when set to about 360HZ.


Please someone check for this.
Settings:
1. Antenna connected
2. Tune to any band, any mode.
3. Do not tune in a signal.
4. Must use an external speaker plugged into rear jack.
5. Fitler opened wide.
6. Listen closley under the band noise for low pitch, pulsating tone around 
320 to 400 hz.


Let me know if you hear anything like this. Thanks.


Steve Ellington
[EMAIL PROTECTED] 


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