Help to identify this Noise

Sergey KN7K

Several times in a week I have the noise on 160m at level 59 and it make it impossible to use this band.
WNB, NB or NR do not help.
Does it look like the noise coming from AM stations? Or else?





Thanks
Sergey, KN7K

Stan VA7NF

Patrick

Most likely a switching power supply.  Notice the evenly spaced noise spikes.  They are usually related to the fundamental frequency of the power supply emitting the noise.  

Ha Gei

Sergey KN7K

Sergey KN7K

David-N5PSM

what filter?  "I use a commercial BC band filter that knocks off 80db from .55 to 1.7Mhz"

Sergey KN7K

Stan VA7NF

@David Had to dig it out of my rack.
Clifton Labs Z10020B NAVTEX version

Use it to **** BC band while SWL on aircraft beacons - Need gain on these VLF frequencies and cannot overload with BC signals.
@Sergey: 1) Your later images are a different time of day - Naturally because the original images are with 160M skip in (
Also all the latter images are with Flex filters in (not wide)
2) No question you have a mix of various noise sources
3) I see your 160M antenna also has peaks on 80 and 40M as the interference also has peaks on those bands.
4) Looking at your DC to14MHz view, you need BC band filtering when the skip is in

No time to investigate right now - Heading off to operate the VE7RAC sponsor station for the Canadian RAC Winter contest - Drop by and have a very brief talk to our YL SSB ops or this old, not so lovely, CW op.

Ken Wells

Sergey KN7K

Robert Lonn

Looks a lot like a Malfunctioning SOLAR Power Array!!!! 

Sergey KN7K

Ken,
I pretty much removed everything from the line - no lightning protector now.
Cable from the radio goes through line isolator and 43ft transformer at the base.

All house is "dark" - no lights, just Fridge and my radio.
Well, few wallwarts that always on, so i am not suspect them (yet).
Either Flex or FT5000 see the same noise, so since FT5000 uses internal PS, I do not suspect my Astron VS35M.

I see that pretty often, it comes and goes.
That's why I am not sure if it a boadcast or not, other wise I would see it all the time.

I suspect my neighbors may have some devices that make this noise to appear, but I cannot go around and ask.

The question is what kind of filtering may help here, or how can I isolate it -  is related to broadcast below 1.7mhz or not?

Sergey, KN7K
 

Ha Gei

This is why i asked..  maybe a solar panel OPTIMIZER , they can easily interfere over 100 meters away.

Sergey KN7K

I do not see all houses around if the have a solar panels or not, could be other side that I do not see.
typically I see it once or twice every week, but last 2 days this noise is there all the time.
i guess I have to wait a little longer to find out if it coming from Christmas lights on the street.
i will borrow a BPF from a friend to try if it helps.
thanks
sergey, KN7K 

Patrick

Patrick

BPF’s will not help as you will still see the noise spikes in band.  It will reduce them outside of the filter BP but that part does not matter to the signal within the BP.   Source elimination is the answer...  by fixing the device it’s self or at least filtering at the source with ferrite. 

Sergey KN7K

Thank you Pat.
i understand that RFI is a battle, especially when I live on a small city lot with many houses on the front of my house and apartment complex on the back.
i still wonder if I should get a broadband filter to eliminate possible noise from AM stations. I see the closest one from Portland to Vancouver is about 6 miles away and very very loud on 1520khz.
i guess there is no way to verify if it’s coming from AM band without purchasing such filter.
sergey, Kn7K 

Patrick

I live less then six miles from most of the AM broadcast stations here on Kauai.  I have a very good filter, but it has practically no observable affects on the overall band pass of the ADC output.  This is a tribute to the Flex 6000’s immunity to overload.  

Uwe - DK3WW

Ha Gei

Sergey KN7K

Robert Lonn

Patrick

Just a comment about Electric cars.  Having worked in this area and also the owner of an electric car.  It is much less likely that electric cars will be a source of interference.  They are more thoroughly tested then most other devices and must withstand interference (very well shielded and filtered) for safety reasons.  The chargers are all actually built into the car.  The so called charging device is just an interface that contains the items needed to protect the user and the car from external sourced problems.  

Sergey KN7K

Ha Gei

Sergey KN7K

Robert Lonn

Sergey KN7K