[Elecraft] RFI issues

Jim Brown jim at audiosystemsgroup.com
Wed Feb 19 18:50:46 EST 2020


On 2/19/2020 7:12 AM, Gmail - George wrote:
> Andreas,
> You might want to go to the station and talk the the Chief Engineer. If he
> is the nice-guygal type CE he will help you (Not al CEs are the nice kind
> but most are).

Maybe in 1960, but no way in 2020. Besides, it is quite unlikely that 
these stations are causing your problem, but as has been observed, a 
simple LPF inserted in the antenna will prevent those TX from hitting 
your RX.

George is right on about antenna directivity and the spectrum analyzer 
display.

As I observed earlier, the FAR more likely source(s) of your noise are 
dozens of switch-mode power supplies in your home and the homes of each 
of your neighbors, other equipment that includes power control 
electronics, and equipment that includes microprocessors.

This link can query the FCC website to see technical details for any 
broadcast station in the US. https://www.fcc.gov/media/radio/am-query

73, Jim K9YC


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