Folks,
Thanks on the other threads the suggestions for identifying and eliminating various RFI across various HF bands. I've significantly reduced my noise, especially with the use of mix 31 and mix 43 toroid chokes around problematic cables. Some really noisy switchers, I've replaced, etc.
But I have one noise source that appears to be utility power that I can't seem to get rid of.
On 40m I have noise at every 60Hz.As you can see in the spectrum scope there is noise at 7.120, 7.180, 7.240, etc.
I'm assuming this is from utility power noise at 60hz.
I'm running the radio on an AGM battery and NOT running it off a power supply. If I disconnect the antenna, I get no noise...so this is coming in from either the antenna or feedline.
Any thoughts/suggestions?
Thanks,
-J
Thanks on the other threads the suggestions for identifying and eliminating various RFI across various HF bands. I've significantly reduced my noise, especially with the use of mix 31 and mix 43 toroid chokes around problematic cables. Some really noisy switchers, I've replaced, etc.
But I have one noise source that appears to be utility power that I can't seem to get rid of.
On 40m I have noise at every 60Hz.As you can see in the spectrum scope there is noise at 7.120, 7.180, 7.240, etc.
I'm assuming this is from utility power noise at 60hz.
I'm running the radio on an AGM battery and NOT running it off a power supply. If I disconnect the antenna, I get no noise...so this is coming in from either the antenna or feedline.
Any thoughts/suggestions?
Thanks,
-J