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ac noise
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Antennas : Beverage
- Comparison of Beverage antenna
- A ranking of receiving antennas based on noise being evenly distributed in all directions. These rankings are most accurate in the frequency range of AM broadcast, 160 or 80 meter bands
[Hits: 2226 | Votes: 2 | Rate: 6.50] 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: 3917 | Votes: 3 | Rate: 8.33] Antennas : EH
- W8JI Technical pages
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- Amplifier, vacuum tube, receiving beverage loop vertical and transmitting antenna system technical information radiation resistance, EH antenna, noise,receivers, and information on keyclicks.
[Hits: 18633 | Votes: 35 | Rate: 8.23] Antennas : Loop
- The K6STI Receiving Loop
- This relatively unknown antenna does an amazing job pulling weak low band signals out of man-made noise backgrounds
[Hits: 2054 | Votes: 4 | Rate: 5.50] Antennas : Theory
- Local QRM reduction
- It is not always possible to tackle the sources of local QRM. What remains is trying to reduce the noise level by means of your antenna system.
Learn how to reduce QRM and understand how cancell noises by PA0SIM
[Hits: 570 | Votes: 0 | Rate: 0.00] 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: 526 | 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: 9000 | Votes: 18 | Rate: 3.49] Manufacturers : Accessories
- 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: 558 | Votes: 5 | Rate: 5.20] - 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: 516 | Votes: 1 | Rate: 10.00] Manufacturers : Amplifiers
- SSB Electronic USA
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- 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: 6102 | Votes: 5 | Rate: 7.00] Manufacturers : Antenna Analyzers
- Timewave
- Sells leading-edge voice and digital communications products to the world-wide military, government, industrial, and amateur radio marketplaces.
Bluetooth Remote Audio/PTT, Rig Controller with Audio & PTT , HamLinkUSB Rig Control, Noise filtersm antenna analyzers, Multimode Data Controller, TNC, Packet Radio Terminal Node Controller. USB2RS232
[Hits: 1897 | Votes: 1 | Rate: 7.00] 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: 1339 | 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: 2520 | Votes: 5 | Rate: 5.40] - Antenna Noise and Signal Cancelling at LF
- The fact that the phasing between a wanted signal and an unwanted signal can be different on different antennas is put to advantage. With this condition, the unwanted signal can be cancelled out by controlling amplitude and phase. The heart of the system is some form of phase control circuitry.
[Hits: 362 | Votes: 0 | Rate: 0.00] Publications : RF Foundamentals
- RF Circuit design basics
- Ebook by Akira Matsuzawa Tokyo Institute of Technology, Building blocks in RF system and basic performances, Device characteristics in RF application , Low noise amplifier design, Mixer design and Oscillator design
[Hits: 589 | Votes: 0 | Rate: 0.00] Shopping and Services : CB Radio Stores
- Thomas distributing
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- Discount CB & Accessory Distributor. Top Brands such as Cobra, Uniden, Midland, Galaxy, Solarcon, Bandit, Pyramid, Wilson, Superstar, Palomar, Nortstar, President, Dosy, Paradynamics, K40, Nemarc, Road Noise, Astatic, Turner, Telex. Best Prices and exceptional service. 21 Years serving the Communication Trade.
[Hits: 20747 | Votes: 21 | Rate: 6.05] Software : Audio Recorders
- Scanrec Scanner Recorder
- Scanner Recorder (Scanrec) is a free audio recorder that is primarily designed to record speech. It has a VOX control that allows the user to save disk space when no sound is present in the signal. Since FM communications has such an effective squelch, the recorder works best with FM. HF ham bands and World Band radio have such a poor signal to noise ratio that the VOX gate on Scanrec might not be very easy to set.
[Hits: 9817 | Votes: 35 | Rate: 7.03] Software : Beacon Monitoring
- Faros
- Windows shareware, automatic NCDXF beacon monitor for Radio Amateurs, SWL'ers and HF communication engineers. by Alex VE3NEA. It continuously monitors 18 NCDXF beacons on five bands, automatically detects the presence of the beacon signals, even in QRM and noise.
[Hits: 788 | Votes: 2 | Rate: 10.00] 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: 804 | Votes: 1 | Rate: 9.00] Software : Signal Generator
- SimJT
- SimJT is a simulation program. It generates audio-frequency JT65 and CW signals in a background of gaussian white noise, with user-specified signal-to-noise ratio.
[Hits: 1046 | Votes: 0 | Rate: 0.00] Software : Spectrum analyzers
- Spectrum Analyzer Real-time FFT
- Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.
[Hits: 8223 | Votes: 6 | Rate: 8.33] 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: 1624 | Votes: 0 | Rate: 0.00] Technical Reference : Radio Frequency Interference : Noise Reduction
- QRM and noise reduction
Priority listing
- 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: 3264 | Votes: 4 | Rate: 8.00] - Common-Mode Noise
- Receiving Common Mode Noise shows how lack of a balun can contribute to system noise
[Hits: 1345 | Votes: 2 | Rate: 10.00] - Calculating the Received RF Noise Power
- Voacap, high-frequency ionospheric communications analysis and prediction
[Hits: 138 | Votes: 0 | Rate: 0.00]
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