HFU HF Underground
Technical Topics => Equipment => Topic started by: East Troy Don on October 09, 2025, 1406 UTC
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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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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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Thank you, Sir!
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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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RobRich posted about the SV3ORA NR-1 Noise Blanker here (https://www.hfunderground.com/board/index.php/topic,129907.msg400269.html#msg400269).