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rf noise
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Technical Reference : Radio Frequency Interference : Noise Reduction
Site listings
Antennas : Dipole
- T2FD, The Forgotten Antenna
- The terminated. tilted, folded dipole T2FD is a little known antenna that performs excellently. Compact in size compared to a half-wave dipole the T2FD provides signal gain, wide frequency coverage, and exceptionally low noise characteristics.
[Hits: 4039 | Votes: 3 | Rate: 8.33] Antennas : Feed Lines
- HC DX Feeding that antenna
- Avoid noise, boost performance: make a perfect coax feed line. The perfect feedline, How to install your antenna properly, How to get the best from your coax
[Hits: 2154 | Votes: 1 | Rate: 10.00] Antennas : Feed Lines : Choke
- Common Mode Choke Theory
- A common mode choke may be used to reduce a type of electrical noise known as common mode noise. Electro-magnetic interference (E.M.I.) in the circuit's environment is one source of electrical noise.
[Hits: 1194 | Votes: 4 | Rate: 1.00] Antennas : Shortwave Antennas : Theory
- Interference Cancelling System
- The use of interference signal cancellation has been around for some time. The idea is to use an auxiliary antenna almost any random length of wire in addition to the main receiving antenna
[Hits: 1461 | Votes: 1 | Rate: 3.00] Antennas : Theory : Antenna Gain
- G/T Simulations - by VE7BQH
- Here you will find information on how antennas behave when stacked
G/T is an important figure-of-merit for the antenna's overall receive performance, because it balances forward gain (G) against received thermal noise (T).
[Hits: 546 | Votes: 7 | Rate: 8.14] Antennas : WiFi
- A Horn Antenna for 2.4 GHz.
- This Antenna is not really practical for AO-40 reception, but horn antennas have a number of qualities useful in microwave antenna testing and noise figure measurements.
[Hits: 9304 | Votes: 18 | Rate: 3.49] Manufacturers : Accessories
- LinkPlus
- LinkPlus products enhance the voice quality of HF SSB amateur. Eliminates virtually all channel noise and interference and greatly strengthens SSB radio signals
[Hits: 713 | Votes: 2 | Rate: 5.50] - bhi Ltd
- Design & manufacture of Noise Eliminating speakers and modules for effective removal of unwanted noise & interference from SSB, HF, VHF, FM & UHF using new DSP technology
[Hits: 561 | Votes: 5 | Rate: 5.20] - BHI
- Speakers and RFI noise reduction products
[Hits: 735 | Votes: 1 | Rate: 10.00] - BHI Ltd
- Noise eliminating products. Remove unwanted background noise and interference leaving only the speech. Clear communications, listen stress free. Dsp noise cancellation solutions.
[Hits: 528 | Votes: 1 | Rate: 10.00] Manufacturers : Amplifiers
- Mutek
- Transverters, amplifiers and low noise preamplifiers
[Hits: 4880 | Votes: 4 | Rate: 3.50] - TE Systems
- Manuf RF power amplifiers wideband+narrowband for Commercial, Defense, OEM and amatuer markets. Also low-noise rf amplifiers
[Hits: 936 | Votes: 0 | Rate: 0.00] - SSB Electronic USA
- manufactures and distributes HF, VHF, UHF and SHF equipment covering 10MHz. - 47.0GHz. Our products include: Wireless LAN / WAN Bidirectional Linear Amplifiers, Low Noise Preamplifiers - LNA's, RF Linear Amplifiers, Relays, Transverter Systems, Frequency Translation Systems, Downconverters, Antennas, Parabolic Dishes, Coaxial Cable, Relays, Antenna Switches, Microwave Test equipment, PC controlled Receivers, Microwave Linear Amplifiers including models for Telemetry, Wireless, and CDMA applications.
[Hits: 6402 | Votes: 5 | Rate: 7.00] - LNA Technology
- LNA Technology High Performance Low Noise Preamplifiers for Amateur Radio, VHF-UHF weak signal, DX, EME, and commercial applications.
[Hits: 1524 | Votes: 3 | Rate: 6.67] Operating Modes : Hellschreiber
- Hellschreiber beacon project
- This web site describes a low power beacon system to be used for propagation and performance tests on the lower bands. The beacon offers CW (on-off keyed) modes and FSK modes; the traditional Morse ID mode, and Feld-Hell, another highly noise immune CW mode.
[Hits: 1363 | Votes: 5 | Rate: 9.80] Operating Modes : Longwave
- VLF-LF And the Loop Aerial
- The article discusses the theory of loop aerials for receiving and how they reduce the level of local noise. A Loop Aerial is described suitable for use on the LF and VLF bands together with a circuit of an interface loop tuner and preamplifier. The discussion extends to the problems of amplifier noise and the advantages of tuning the loop.
[Hits: 2607 | Votes: 5 | Rate: 5.40] Operating Modes : Mobile
- KØBG's ham radio mobile operator web site
- This site is dedicated to mobile amateur radio operators, old and new alike. Whether you are into HF, or VHF operation, I trust the information presented will increase your enjoyment of our great hobby.
With safety as a byword, there are articles on amplifiers, antennas, bonding, impedance matching, installing hardware, mobile equipment, noise and RFI abatement, wiring, and much more. I do my best to keep these articles up to date, and easy to follow.
[Hits: 3879 | Votes: 9 | Rate: 8.56] Software : Linux
- Qucs - Quite Universal Circuit Simulator
Priority listing
- Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window. Run on Linux.
[Hits: 864 | Votes: 1 | Rate: 9.00] Software : Macintosh
- TCalc
- TCalc+ analyses the Noise and intermodulation performance of radio receiver front-ends.
[Hits: 560 | Votes: 0 | Rate: 0.00] Technical Reference : Electronics
- 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: 3145 | Votes: 6 | Rate: 9.50] Technical Reference : Preamplifiers
- Receive only processing equipment
- One of our most popular products, receiving preamplifiers are used for achieving top signal band performance in competition operating, low noise longwave reception, repeater applications into the UHF region, or lab use
[Hits: 1670 | Votes: 0 | Rate: 0.00] Technical Reference : Radio Frequency Interference : Noise Reduction
- 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: 1712 | Votes: 4 | Rate: 5.75] - ARRLWeb: Solving Ignition Noise RFI
- Solving Ignition Noise RFI article. Help on removing noise interfences caused by ignition
[Hits: 957 | Votes: 1 | Rate: 10.00] - Alternators & Batteries
- Influence of batteries on RFI and noise generation by k0bg
[Hits: 770 | Votes: 1 | Rate: 10.00]
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