[BVARC] QRM in new radio setup
Chris Luppens
jcluppens at ussailing.net
Thu Feb 4 17:15:13 CST 2021
I went all LED, finished turn over 2 + years ago. Then I heard horror stories about LEDs and noise. Well in my case I have run experiments without a single light on and with every light in the house on. I cannot see anything. I don’t have a spectrum analyzer but post Covid would treat a tester to a good single malt to see what one would say.
I also highly recommend replacing old fluorescent lights with led strips. They are instant and brighter and trouble free in humid environments like my garage.
Chris Luppens
> On Feb 4, 2021, at 8:06 AM, Christopher Boone via BVARC <bvarc at bvarc.org> wrote:
>
>
> I found my noise problem in the florescent lights in my kitchen...turn them off and it goes away...probably the ballast... I'm in a rental so....guess I turn them off to operate lol
>
> Chris
> WB5ITT
>
>> On Thu, Feb 4, 2021, 12:59 AM Michael Monsour via BVARC <bvarc at bvarc.org> wrote:
>> Divide and Conquer
>> Get a 12 volt battery to operate the radio
>> Then pull the main breaker in your house.
>> Either it gets better or it doesn't
>> Michael Monsour
>>
>>> On Wed, Feb 3, 2021 at 6:56 PM Gus Bernard via BVARC <bvarc at bvarc.org> wrote:
>>> What Rick says. Then try taking it portable, away from the QTH and power lines.
>>>
>>> Gus, K5GMB
>>>
>>>> On Sun, Jan 31, 2021 at 7:33 PM Mark Brantana via BVARC <bvarc at bvarc.org> wrote:
>>>> I am reaching out for ideas on a radio issue. I have installed an IC-745 Icom with an MFJ-2010 offset fed dipole. The power supply is a 20A MegaWatt switching power supply, which is located right next to the radio. The antenna is under some high power-lines with the long leg 90 degrees to the power-lines. I used my nanoVNA to study the band SWR response, and everything looks reasonable, though some small adjustments may need to be made. Nothing is grounded as yet.
>>>>
>>>> Here’s my problem. I am only attempting to receive at this time and I get consistent QRM white noise across all bands to the point where I can barely pick out some voices, etc.
>>>>
>>>> I am confident that the antenna is properly connected due to my antenna study.
>>>> I don’t believe the power lines are an issue, since the problem would likely be more isolated show up as birdies at certain frequencies.
>>>> The radio settings seem to all be correct according to the manual.
>>>> Lack of grounding, but again the white noise is generally consistant across the spectrum. Still, this could be the problem.
>>>> I have turned off my computer, so there no QRM from its power supply.
>>>> It does not help to have the switching power supply right next to the radio, but other users give good reports on this model and no QRM issues are mentioned.
>>>> I tried the radio at different times of the day on 20-m voice band, with the same noisy result.
>>>> It could be the net result of a large number of small device transformers, but I doubt it.
>>>> I turned off the wifi, and still no change.
>>>>
>>>> Hmm… I am a little stumped. Any thoughts or ideas? Personal experiences?
>>>>
>>>> Mark
>>>> N5PRD
>>>> ________________________________________________
>>>> Brazos Valley Amateur Radio Club
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