idea about that noise on VHF

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  • Updated 2 years ago
HI   still try to track down a recurring noise on VHF 

https://youtu.be/9dDM-l0uohc

have see it also on a R&S Spectrum have in deep test the radio on test equipment
and radio was no the root cause 

during test i close all electric panel except the radio and PC outlet 

HF seem unaffected ,even if have noise but it HF in urban zone so ....


on VHF it not cause major issue while narrow band QSO but it for sure increase noise floor 
noise floor increase of 30db from dummy load to antenna  and seem to come in all direction 

so any idea ?   Radio  6700

VE2OLM  Marc L.
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Marc Lalonde

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Posted 2 years ago

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Mark - WS7M

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Do you have the weighted average turned on, on your pan?  Try turning it off.  My pan looks like that sometimes with weighted average turned on.

Without a doubt this is not a solution to the noise but I think in some cases the weighted average can make it look way worse.
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Marc Lalonde

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Thank  that do miracle on display   ,still need to find the source of that 
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Norm - W7CK

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A friend of mine had a bunch of noise on 2m.  I drove by his house and started picking it up on my 2m mobile 3 houses away.  I could even hear it when I drove down the street behind his house.  The noise was coming from some LED flood / can lights that he had bought from Costco.  I believe they were the 100w?  While I'm not sure of the wattage, I know they were the Feit brand.  He had them installed in the ceiling of his kitchen.

These things generated so much hash, it was almost inconceivable.  If someone in your neighborhood would install these things, you're pretty much off of 2m.

Does anyone know what the FCC actually does these days? 
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Mark - WS7M

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Old timer story approaching:

I remember as a teen driving down in LA with a ham buddy and we happened upon an FCC van at an intersection with an antenna on top.

We decided to follow and see what they were tracking.  Short time later the antenna began to swing a bit and they made a couple turns.

At some point the driver noticed us and stopped and got out.

She was a pretty hot looking lady especially with the mean look she had on her face and she said, "Don't follow us!"  I said, well sorry... we are hams and we were curious.  

At that comment her features softened into a smile and she stuck her hand in the door and introduced herself as some ham call.  Then she firmed up again and said, well you really shouldn't follow us but I'll kind of forget you are behind me.

We followed them for about another 2 miles then we ran out of time.  Would have liked to have known what they were after or had a look in the van at least.

But I think the days of this have gone the same ways as the Animal Control people in our area.  Budget cuts = no more...

This to me is because our politicians think it is ok to vote themselves pay raises and have their own medical and retirement funds and sit around and argue all day about a lot of meaningless things.
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Stan - VA7NF

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Had the same problem covering all of HF, identical looking display.  It was DF looped (yes Bert I made it a verb) to a power pole with two different cable/internet company amplifiers.

The delay/hold display is very useful to "show" service people the problem; recorded from the pan adapter and put on a USB drive.

Neither company found anything wrong but the noise was no more.

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Marc Lalonde

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i have remove 2 electronic ballast last week.  that lower noise floor of a good 10db .
but still chasing that impulse noise  may look like electric arc but  i not see it < 30mhz

my time to try DF loop on my FT817  , but even on my 9 element VHF Beam noise was same on all direction   so may very close  in the near-feild zone of antena