[Elecraft] 14.316 help!

[Jim Wiley]

No, a 3.579 trap would indeed notch out the fundamental,. but not the 
harmonics.   Those signals are coming in on your antenna.   For any of a 
number of reasons, the 14 MHz versions of the interference are more 
prevalent.   Consider that  20 meter signals propagate more easily from  
home wiring than do 80 meter signals, plus the aforementioned fact that 
many computer cards use the 14.318 frequency directly.  A 80 meter trap 
certainly won't affect those.  As a rule, a person can find any number 
of signals scattered across the entire 14.315 to 14.319 range.  Yes, 
they are crystal controlled, but the crystals themselves are not 
necessarily that accurate - in many cases, "close" is good enough, and a 
lot cheaper. 


- Jim,. KL7CC



Edward R. Cole wrote:
> So could one insert a trap on 3.579 MHz to notch the offender?  Are 
> the harmonics generated inside the receiver or where?
>
>
> 73, Ed - KL7UW, WD2XSH/45
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