Welcome to AA7MW
Noise Problam - Any help would be appreciated
The Problem
I'm asking for help with a serious noise issue. I am including a video of it below. It's a pulsating noise about twice a second, and a high noise floor
in general.
This is all across the frequency spectrum - all the ham bands and everything in between.
My radio is a new Anan 7000 DLE MK II. My antenna is a new DX Commander. My computer is a newly built high-end gaming machine.
1. Tried turning off all breakers in the house, except the one running the computer, radio, etc. Noise remained.
2. Removed the antenna and the noise stopped (along with anything else).
3. Attached an antenna of about 10 feet of speaker wire and the noise returned.
4. Powered the radio with a separate battery. Noise remained. (Not the switching power supply?)
5. Connected a laptop computer to the radio and the pulsing noise stopped. (Not coming in from the antenna?)
At this point I assumed it's something in my computer system or attached USB hubs, wall warts, ethernet switch, etc. So I:
1. Unplugged each wall wart/monitor. Noise remained.
2. Unplugged various USB devices. Noise remained.
3. Put Mix 31 chokes on the 2 power strips, computer power cord, ethernet switch. Noise remained and there was no change to the level, etc.
I'm now at a loss as to what to try next. So, I'm asking for any help or suggestions. I hate to put money into more choke kits and such since what
I tried had no effect. If it is in the computer, etc., I would have expected the chokes to make some difference.
Here is the video
You can contact me at catdad23@gmail.com
73's
Mike - AA7MW