noise

noise

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• Two Wire Beverage - Two Wire Beverage by Jeff Parke, describes a two-wire Beverage antenna design for improved reception with switchable direction (forward/backward) and lower noise level. It includes details on building the antenna, matching transformers, and a control box for selecting direction and connecting to the receiver.
  [ Hits: 11717 | Votes: 10 | Rating: 5.8 ]
• Beverage Antennas - So you want to build a Beverage Antenna. This article offers insights on building a two-wire Beverage antenna for better reception. Key points include using long wire (at least a wavelength, ideally two), keeping it straight and away from vertical conductors, and sloping ends for noise reduction. The author recommends copper clad wire and mentions transformer design considerations for later discussion.
  [ Hits: 6543 | Votes: 5 | Rating: 7.2 ]

• W8JI Technical pages - Amplifier, vacuum tube, receiving beverage loop vertical and transmitting antenna system technical information radiation resistance, EH antenna, noise,receivers, and information on keyclicks.
  [ Hits: 22140 | Votes: 37 | Rating: 8.3 ]

• A Small Wire Loop Antennas for 160 meters  ^pop - Low noise, receive only coax loop antennas for 160 - 10 meters HF bands
  [ Hits: 49349 | Votes: 10 | Rating: 6.5 ]

• 160/80m Coaxial Receiving Loop Antennas  ^pop - Receiving loop antenna for top band. This antenna allow to reduce noise on both bands. The stand alone 80m loop is approximately four feet in diameter. And made of light weight material. Which makes it ideal for portable use or you can mount it above a pre-existing vhf antenna, and due to it's small size it is quite rotatable.
  [ Hits: 65116 | Votes: 61 | Rating: 5.89 ]

• Flags and Pennants - Excellent low-noise receive antennas originated by EA3VY and optimized for 160 meters by K6SE
  [ Hits: 2417 | Votes: 2 | Rating: 1.5 ]

• Low Noise Antenna Connection - Reducing noise to your antenna can gain your aerial performance, learn how.
  [ Hits: 7573 | Votes: 2 | Rating: 6 ]
• Receiving loop for long waves - Cancelling out unwanted noise sources by DL3FP
  [ Hits: 3987 | Votes: 5 | Rating: 5.4 ]

• 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: 966 | Votes: 2 | Rating: 5.5 ]
• Magnecor - Finally auto ignition noise suppressor wires that really work.
  [ Hits: 713 | Votes: 4 | Rating: 7.75 ]
• JPS Communications - Noise reduction products
  [ Hits: 729 | Votes: 3 | Rating: 8.33 ]
• 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: 833 | Votes: 5 | Rating: 5.2 ]

• TE Systems - Manuf RF power amplifiers wideband+narrowband for Commercial, Defense, OEM and amatuer markets. Also low-noise rf amplifiers
  [ Hits: 1599 | Votes: 1 | Rating: 5 ]

• W2IHY Audio Products - Band audio equalizer and noise gate compatiable with ICOM, KENWOOD, YAESU and other radios
  [ Hits: 2694 | Votes: 35 | Rating: 8.09 ]

• Thomas distributing - 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: 22953 | Votes: 22 | Rating: 5.82 ]

• 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: 15542 | Votes: 53 | Rating: 6.82 ]

• 432 MHz EME PreAmplifier - 432 MHz EME low noise amplifier. Circuit, components and image by Christoph Petermann DF9CY
  [ Hits: 9753 | Votes: 21 | Rating: 5.43 ]

• Audio Spectrum Analyzer - OscilloMeter  ^pop - Audio Spectrum Analyzer for Real-time, FFT, OscilloScope, Frequency counter, voltmeter, noise and distortion meter, phase shift meter. Multi-Tone Sound Frequency Sweep Generator. White, pink noise.
  [ Hits: 89801 | Votes: 328 | Rating: 6.2 ]

• 144 MHz preamplifier with BF981 - Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.
  [ Hits: 17963 | Votes: 28 | Rating: 5.82 ]
• 23 cm GaAs FET preamplifier - On 23cm the best way to obtain a good RX-sensitivity is to use a GaAs-FET in the front-end, since these devices show very low noise figures.
  [ Hits: 4050 | Votes: 6 | Rating: 4.67 ]

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