[Elecraft] 14.316 help!

[Jim Wiley]

David -


No, the problem is not the crystal.  It is the  _oscillator_.  The 
oscillator is usually a more or less square-wave type, which is rich in 
harmonics.   These harmonics are then radiated by the circuitry in the 
offending device, and make their way to your station. 


The function of the crystal is to control (stabilize) the frequency on 
which the oscillator operates.   Color burst oscillator crystals are 
used so much because they are both inexpensive and easy to use.  They 
are inexpensive because literally hundreds of missions of them are 
manufactured.  For this reason, there have been created a large 
selection of  IC chips that use the color burst frequency as the primary 
timing function for whatever device into which they are incorporated.  
Many of these chips are very simple to use, in most cases requiring no 
components other a chip (manufactured specifically for the intended 
function) and the crystal itself to create the desired device.


- Jim, KL7CC

 

David Guernsey wrote:
> I realize it is the 4th harmonic.  I do not have any problems with any harmonics 
> of 3579 KHz except the 14316 KHz (4th harmonic).  Thus, I wonder if the problem 
> is really from the color burst crystal.
>
>  73s de Dave KJ6CBS
>
>   
>