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Author Topic: Cancelling the Noise  (Read 14110 times)

East Troy Don

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Cancelling the Noise
« on: October 09, 2025, 1406 UTC »
I've been exploring options regarding noise cancelling modules  to use with my ICOM R75 and/or YAESU FRG-7700.  The BHI -LTD  and Xiegu GNR1 appear to be viable candidates . Any recommendations or comments on these two modules ( or others ) ?
Thanks!
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Primary: ICOM R75 W/WV-601 passive loop masted @ 20'  Secondary: Tecsun S2200X . Yaesu  FRG 7700 W/MLA-30+ indoors. Tertiary: Tecsun PL-990X, Tecsun PL-880 . Malahit DSP SDR V3,  . : Also, Qdosen DX-286, 1940 Mantola am/sw tube. CountyComm GP-5/SSB hand held, Tecsun PL-380 ,et al.  QTH: FONTANA, WI  USA.  Sea Level: + 990' .  75 miles (but not far enough) NW of Chicago

ThaDood

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Re: Cancelling the Noise? BHI...
« Reply #1 on: October 09, 2025, 1849 UTC »
A friend of mine, 20 miles away from me, swears by his BHI Active Speaker that he uses to take out noise at his end. https://bhi-ltd.com/    Then, some are experimenting with RM Noise from their computers.   http://www.bitofsnow.com/2023/10/20/ai-noise-suppression-is-an-amateur-radio-breakthrough/   My answer??? Move antennas as far away from the house as possible. However, that does not reduce lightning crashes on the low bands. A W.O.G., does help, (Wire On Ground.) However, don't expect DX records to be broken with that.
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East Troy Don

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Re: Cancelling the Noise
« Reply #2 on: October 09, 2025, 1930 UTC »
Thank you, Sir!
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Primary: ICOM R75 W/WV-601 passive loop masted @ 20'  Secondary: Tecsun S2200X . Yaesu  FRG 7700 W/MLA-30+ indoors. Tertiary: Tecsun PL-990X, Tecsun PL-880 . Malahit DSP SDR V3,  . : Also, Qdosen DX-286, 1940 Mantola am/sw tube. CountyComm GP-5/SSB hand held, Tecsun PL-380 ,et al.  QTH: FONTANA, WI  USA.  Sea Level: + 990' .  75 miles (but not far enough) NW of Chicago

Charlie_Dont_Surf

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Re: Cancelling the Noise
« Reply #3 on: October 13, 2025, 2204 UTC »
My problems are largely man-made noise from the plethora of solar inverters surrounding my house and secondarily a high-voltage power line about 1/2 mile away. The noise could be a lot worse though and using a horizontal dipole that is slightly farther from my neighbors' houses instead of mostly vertical antennas near one of the "chief interferes" has helped quite a bit. However there remains a certain amount of noise.

I have found the WiMo QRM Eliminator to be helpful. Its just a tunable canceller.
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Sealord

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Re: Cancelling the Noise
« Reply #4 on: October 14, 2025, 1116 UTC »
RobRich posted about the SV3ORA NR-1 Noise Blanker here.
« Last Edit: October 14, 2025, 1117 UTC by Sealord »
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East Troy Don

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Re: Cancelling the Noise
« Reply #5 on: October 23, 2025, 1934 UTC »
Thanks everyone!
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Primary: ICOM R75 W/WV-601 passive loop masted @ 20'  Secondary: Tecsun S2200X . Yaesu  FRG 7700 W/MLA-30+ indoors. Tertiary: Tecsun PL-990X, Tecsun PL-880 . Malahit DSP SDR V3,  . : Also, Qdosen DX-286, 1940 Mantola am/sw tube. CountyComm GP-5/SSB hand held, Tecsun PL-380 ,et al.  QTH: FONTANA, WI  USA.  Sea Level: + 990' .  75 miles (but not far enough) NW of Chicago

kil0_whaatz

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Re: Cancelling the Noise
« Reply #6 on: March 21, 2026, 2344 UTC »
RF interference is incredible these days. The plethora of cheaply designed electronic circuits that are spewing garbage RF is maddening. I built a 1:1 choke today for 20m, and even with great vna test results. My noise floor is still infuriating.  >:(
Going to build a mag loop for dedicated receive, to try and get some relief.
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