- QRM and noise reduction
- You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array.
Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
[ Hits: 5075 | Votes: 6 | Rating: 7 ]
- A low-pass filter to remove alternator whine
- How to build a low-pass filter to remove alternator whine from your car
[ Hits: 392 | Votes: 1 | Rating: 10 ]
- Alternators & Batteries
- Influence of batteries on RFI and noise generation by k0bg
[ Hits: 1138 | Votes: 1 | Rating: 10 ]
- Antenna Noise and Signal Cancelling at LF
- By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.
[ Hits: 7880 | Votes: 6 | Rating: 4.5 ]
- Antenna RFI Problems
- Antenna problems, eliminating RFI while in Cars mobile operations
[ Hits: 444 | Votes: 1 | Rating: 10 ]
- ARRLWeb: Solving Ignition Noise RFI
- Solving Ignition Noise RFI article. Help on removing noise interfences caused by ignition
[ Hits: 1235 | Votes: 2 | Rating: 10 ]
- Automotive RFI elimination
- ARRL pdf file on how remove car noise from your radio. Modern vehicles are RF noisy environments. Come learn how to identify and silence yor mobile noise sources, by WA6PDP
[ Hits: 3133 | Votes: 6 | Rating: 6.96 ]
- Calculating the Received RF Noise Power
- Voacap, high-frequency ionospheric communications analysis and prediction
[ Hits: 420 | Votes: 1 | Rating: 6 ]
- Common-mode chokes Measurements
- Common-mode chokes are useful solutions for RFI reduction. Winding a few turns of coaxial cable on the FT 240-31 toroid can reduced the noise below the received noise floor. In this article author measure different chokes
[ Hits: 153 | Votes: 1 | Rating: 8 ]
- Common-Mode Noise
- Receiving Common Mode Noise shows how lack of a balun can contribute to system noise
[ Hits: 2078 | Votes: 4 | Rating: 8.5 ]
- Computer monitor noise on HF
- RFI Forum at eHam.net
[ Hits: 773 | Votes: 0 | Rating: 0 ]
- Curing RFI in a Keyboard Keyer
- How to solve RFI problems from a keyboard spewing RFI on every band by W2EB
[ Hits: 247 | Votes: 0 | Rating: 0 ]
- Ethernet RFI noise reduction
- How to reduce and eliminate the RF interference at VHF caused by the wired network
[ Hits: 582 | Votes: 1 | Rating: 7 ]
- How to make a mains filter for EMC and noise reduction
- Article showing how I've made a mains filter to reduce EMC in the electricity supplying my shack. I've used a type 31 Fair-Rite ferrite core and the video shows how this performs on 160m through to 40m.
[ Hits: 1190 | Votes: 5 | Rating: 9.6 ]
- I have RFI, now what House Cleaning
- Understanding and eliminating RF Interferences caused by your home devices
[ Hits: 742 | Votes: 4 | Rating: 9 ]
- Mains Filter for EMC & Noise Reduction
- This article shows how to make a mains filter that can be extremely effective in reducing and in some cases eliminating completely EMC from the electricity supplying your shack
[ Hits: 292 | Votes: 3 | Rating: 3.67 ]
- Mains RF Filter
- If RF noise threatens to take your hobby away, this could be probably a good solution to reduce or even eliminate RF Noise.
[ Hits: 119 | Votes: 0 | Rating: 0 ]
- Mobile Radio Noise Elimination
- If you're driving around town listening to the buzz and engine whine blues, pick up this free pub and help yourself enjoy the music. Includes troubleshooting techniques and helpful hints.
[ Hits: 880 | Votes: 2 | Rating: 7 ]
- Noise cancellation on 2m using 2 antennas
- Article on Phase-cancellation of noise on 2m band
[ Hits: 498 | Votes: 2 | Rating: 3 ]
- Noise measurements and reduction
- K1SIX- Noise Measurement and Reduction Techniques
[ Hits: 565 | Votes: 0 | Rating: 0 ]
- Noise Sources
- Computers, TV's, and Switching Systems can cause noises to your receiver
[ Hits: 854 | Votes: 1 | Rating: 10 ]
- Noise tutorials
- Noise foundamentals. Radio frequency interference noise.
[ Hits: 727 | Votes: 0 | Rating: 0 ]
- Radio Noise
- Radio Interferences, QRN, or noise, information by W8JI
[ Hits: 648 | Votes: 0 | Rating: 0 ]
- Reducing Internet Router Noise on 6 Meters
- Slaying the grim reaper of internet router noise on 6 meter
[ Hits: 617 | Votes: 0 | Rating: 0 ]
- RF Noise Powerstroke Diesel
- Reducing and removing RFI Noise
[ Hits: 404 | Votes: 0 | Rating: 0 ]
- RF Noise Supression
- CB Radio RF Noise Suppression
[ Hits: 869 | Votes: 1 | Rating: 2 ]
- RFI and your computer.
- Killing RFI from your PC without turning it off
[ Hits: 574 | Votes: 0 | Rating: 0 ]
- RFI From Computer Equipment
- Recordings of RF noise from personal computers, peripherals and related equipment. If you can match noise at your location to one of these files then you can be confident that you know where your noise is coming from.
[ Hits: 870 | Votes: 0 | Rating: 0 ]
- The RF Noise Identification Website
- VE3HLS Audio files to help identify rf noise (rfi).
Identify the RFI that interferes with your reception
[ Hits: 1185 | Votes: 1 | Rating: 1 ]
- Using ferrite for interference suppression
- Excellent guide to using ferrite cores for interference suppression.
Understanding and Solving RF Interference and Noise Problems by Jim Brown K9YC Audio Systems Group, Inc. PDF File
[ Hits: 6095 | Votes: 6 | Rating: 9.5 ]
