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Call Sign : 26-CT-4871 Posts : 4 Times Thanked : 0 Join date : 2023-07-08 QTH or Location : Stevenage Equipment Used : CRT SS 9900,Intek M899 ,Yaesu FTM400, Cybernet Beta 9000
Subject: Noise on USB 27.305 Sun Jul 09, 2023 1:48 pm
Bought CRT SS 9900 and found every time i went uppers on 27.3050 i got terrible a-mounts of noise 7-9`s constantly yet muppets an nearly every other channel was clear 2-4.
After hours of turning everything that broadcasts rf in the house andd pting tons of ferrite rings on every power cable i found the culprit a laptop charger, even thou i was not plugged in to my Lenovo Laptop it was still plugged up to the mains and as soon as it was switched of noise jropped from 9 to 3.
So if your gettin a ton of noise threw your radio start turning of all apliances till you find the culprit an then wack it with a sledge haer and wont cause a problem nomore
GaryWilson, Victor, Tristar, SangueG and Alex728 like this post
Coyote Contributor
Call Sign : 2-CT-216 Posts : 57 Times Thanked : 1 Join date : 2022-01-25 QTH or Location : Palmdale California Equipment Used : Base RCI 2950 Mirage, Mirage M75 Amatuer Bi-Linear Amplifier,with a Antron 99 base station antenna, Mobile radio Cobra 29 LTD Classic and Wilson 1000 Mag Mount Antenna, Marko F100 Amplifier.
Subject: Noise on USB Mon Jul 10, 2023 1:57 am
My phone charger does the same thing, noise on all frequencies, if i leave it plugged in the wall,if i unplug it the noise drops significantly,
13oots2 Major contributor
Call Sign : 26-CT-4694, M7EUS Posts : 236 Times Thanked : 15 Join date : 2022-11-13 QTH or Location : Dorchester UK Equipment Used : Yaesu FT950, 66FT Endfed Antenna, Various Other Bits and Pieces Age : 57
Subject: Re: Noise on USB 27.305 Mon Jul 10, 2023 2:22 am
I had serious problems with QRM when first using CB here, when running off a battery totally clear reception. Never got to the bottom of it, and now I have a ham rig it seems to suppress any noise due to good filtering.
Chargers and wallwarts seem to be one of the main culprits.
Today at 2:33 pm by Alan Pilot
Subject: Noise on USB 27.305 
