Antenna noise on my 6300

Andy M1DRK

All this is antenna based interference.

Bob K8RC

You have now become aware of how noisy the world has become.

Everything from the drive electronics on a variable-speed furnace fan to the circuits built into LED light bulbs is making noise. The harmonics of the pulse-width modulated square waves in these things make those "humps".

Do you remember learning somewhere along the way that a square wave is made up of a fundamental sine wave and an infinite number of its odd-order harmonics?

Well, now you know what that looks like on a spectrum analyzer.

Dan -- KC4GO

Look to your home for a switching power supply or something like that. WALL WART ... In my case it was the power supply for and external hard drive see attached picture. I turned off breakers one by one until the noise went away... This went all the way up into 10 meters.  See Dr. Howard S. Whites paper on how to build a quite station https://community.flexradio.com/flexradio/topics/how-to-build-a-quiet-station

Hope this helps...
Regards & 73's
Dan --- KC4GO

This was my mess !!!
 

Ken - NM9P

I get a pattern very similar to that from the under cabinet halogen lights in the kitchen. They are powered by an old wall-wart power supply.  It wipes out 160-10 meters.  I haven't had the opportunity to replace it yet.

k3Tim

Agree with Bob, this looks like the same i observe on a " Maytag Neptune washing machine RFI " (Google it).   I've tried grounding the wash machine case to the  copper pipes and wrapped the AC cord 15 times thru a huge 31-mix ferrite to no effect whatsoever. I believe one has to attack it at the source itself, the motor leads.

As mentioned, it's a noisy world now.. 

In the middle of the night around here, the RFI is nonexistent except for a few spurs that I can live with.
I find it's easier to track down RFI problems at 2:00AM to 5:00AM or so when the outside sources are generally off.  Also that let me bag K1N this morning on RTTY!

Good Luck +

73's
k3Tim

George KF2T

So sorry you're now "enjoying" all the radio spectrum can offer! I spent over a year obsessively tracking down noise before I called it quits and realized there was some stuff I couldn't clean up (other people's washing machines, pool pumps, plasma TV, etc. KY6LA has a great presentation on cleaning up your own house. A recounting of my experiences is on my QRZ page. There is A LOT you can do. I also found the MFJ noise canceller (phase device) helps with some sources. I think it was Tim who first told me what I call the Flex Paradox - the best and worst thing about a Flex radio is the spectrum display coupled with that awesome receiver. Now you can obsess about noise you never knew about before! And wow, what a difference when you succeed. GOOD LUCK!