[BVARC] QRM in new radio setup

Sun Feb 7 13:41:46 CST 2021

No problems. Maybe, my anti viral meds for shingles may have reduced the impact. My doc says NO. 

Did you get yours?

> On Feb 7, 2021, at 1:39 PM, Mark Brantana via BVARC <bvarc at bvarc.org> wrote:
> 
> Thank you! Any chance they would change me for the work?
> Mark 
> 
> Sent from my iPhone
> 
>>> On Feb 7, 2021, at 1:36 PM, jcluppens at ussailing.net wrote:
>>> 
>> 
>> Jeff Hoke was in the process of retiring and I believe he is no longer there. He was training his replacement though, his name is Gregory Young.
>>  
>> Gregory.young at centerpointenergy.com
>> Office: 713-945-6555
>> Mobil: 832-715-0549
>>  
>> If you can get him to come out he has all the same equipment and can run a spectrum analysis that could possibly help.
>> Hope that helps.
>>  
>> Chris Luppens
>>  
>> From: BVARC <bvarc-bounces at bvarc.org> On Behalf Of Jeffrey Carson via BVARC
>> Sent: Sunday, February 7, 2021 8:49 AM
>> To: BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc at bvarc.org>
>> Cc: Jeffrey Carson <jcarson222 at yahoo.com>; Mark Brantana <mark.brantana at gmail.com>
>> Subject: Re: [BVARC] QRM in new radio setup
>>  
>> Hello,i have had Jeff Hoke with Centerpoint come out and remediate some noise on a pole behind my house. Very thorough and professional.
>>  
>> His contact information:  Contact Jeff by email FIRST.
>> Jeff Hoke
>> jeff.hoke at centerpointenergy.com
>> 
>> Office: 713-945-6304
>> Mobile:  713-304-2728
>>  
>>  
>> On Saturday, February 6, 2021, 11:37:44 PM CST, Mark Brantana via BVARC <bvarc at bvarc.org> wrote:
>>  
>>  
>> Tonight I hooked up my little TH-F6A to the same antenna and got the same noise. I do have to test out my radio, but I am 85% convinced that it is QRM from a pole transformer located about 25 ft from the long end of my OFDP. This is a reasonably new transformer, since they replaced it about 5 years ago when the old one blew. Anyone have experience with getting the electric company to do a RFI survey?
>>  
>> On the down side, I carried my AM radio to my back yard and heard no detectable interference. This is turning into a real mystery. 
>>  
>> Mark
>> N5PRD
>> 
>> 
>> On Feb 3, 2021, at 6:55 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
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