14.318 Mhz has been widely used on PC motherboards going back to the original 
IBM PC-AT.  
That would be high on my list of suspicious sources.

73,
Rich  AC7MA

On 4/24/2011 12:56 PM, Jim wrote:
> That tone has been there for years.  As long as I remember.
>
>
>
> 73 de Ke4wy Jim
>
> Sent from my compound.
>
>
> On Apr 24, 2011, at 3:38 PM, Grant Youngman<[email protected]>  wrote:
>
>> I've had a weak 'carrier' in this spot for years. Used to have to endure it 
>> for the Icom Net at 14.317 in the old days. No clue what it is.
>>
>> Grant/NQ5T
>>
>> Sent from my iPhone
>>
>> On Apr 24, 2011, at 2:29 PM, Fred Jensen<[email protected]>  wrote:
>>
>>> Mine is at 14317.00 and is moderately weak.  I
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