hf noise
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Antennas : Baluns- VHF Baluns: Fact and Fancy
- Our ideas about HF baluns have changed dramatically in recent years. The focus today is very much on suppressing unwanted common-mode RF currents, to reduce both the received noise levels and the risks of causing interference on transmit.
[ Hits: 282 | Votes: 0 | Rating: 0 ]
- A Small Wire Loop Antennas for 160 meters
pop
- Low noise, receive only coax loop antennas for 160 - 10 meters HF bands
[ Hits: 49335 | 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: 65097 | Votes: 61 | Rating: 5.89 ]
- 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: 963 | Votes: 2 | Rating: 5.5 ]
- 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: 830 | Votes: 5 | Rating: 5.2 ]
- 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: 8402 | Votes: 8 | Rating: 6.12 ]
- LNA Technology
- LNA Technology High Performance Low Noise Preamplifiers for Amateur Radio, VHF-UHF weak signal, DX, EME, and commercial applications.
[ Hits: 2193 | Votes: 4 | Rating: 7 ]
- K0BG'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: 4855 | Votes: 10 | Rating: 8.7 ]
- 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: 15513 | Votes: 53 | Rating: 6.82 ]
- 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: 1420 | Votes: 3 | Rating: 10 ]
- Zeus Radio - Software Defined Radio
- Zeus Radio program is designed specifically
for the ZS-1 transceiver and supports all the
basic functions (RIT, XIT, SPLIT, Noise Reduction,
Auto Notch Filter, etc.) in order to work
in the broadcast brought only pleasure.
Zeus Radio works also with Hermes, Anan, Afedri, Red Pitaya, HiQSDR, Odyssey, Extio, RTL-SDR, Peaberry, Winradio, SDR-IQ, Afedri
[ Hits: 505 | Votes: 1 | Rating: 8 ]
- Low Noise Microwave Amplifier Design Tutorial Series
- This series will follow to completion the full Low Noise Microwave Amplifier design, development and prototyping.
[ Hits: 523 | Votes: 5 | Rating: 8 ]
- UHF Low Noise Antenna pre-amp
- Low Noise Antenna pre-amp for SAT, EME & DX-ing
[ Hits: 2329 | Votes: 2 | Rating: 2 ]
- PlasmaTV QRN Eliminator
- An improved version of DK9NL QRM Killer, with dedicated noise sampling antenna for completely filtering of plasma TV rattle on HF bands
[ Hits: 898 | Votes: 0 | Rating: 0 ]
- HF Band QRM/QRN Noise Canceller
- This noise canceller is suitable for use with a receiver or transceiver and works on all modes, including AM, FM and SSB.
[ Hits: 1650 | Votes: 5 | Rating: 8.2 ]
- VK5TM Noise Canceller
- Noise Canceller kit originally developed about 1989 by G4WMX and GW3DIX and improved by DK9NL and DG0KW.The VK5TM Noise Canceller is another version of the design, with the HF Vox circuit removed and a couple of other minor changes, including the use of SMD JFETs and a double-sided pcb.
[ Hits: 476 | Votes: 1 | Rating: 10 ]
- Locating RF Interference at HF
- A proven and practical approach to dealing with RFI from grow lights and more.
[ Hits: 1303 | Votes: 0 | Rating: 0 ]
- Computer monitor noise on HF
- RFI Forum at eHam.net
[ Hits: 775 | Votes: 0 | Rating: 0 ]
- Ethernet RFI noise reduction
- How to reduce and eliminate the RF interference at VHF caused by the wired network
[ Hits: 587 | Votes: 1 | Rating: 7 ]
- LNA4HF
- low-noise amplifier for HF reception, amplifies signals 80 to 100 times between 0.15 MHz and 30 MHz.
It will let you hear more signals with your RTL-SDR plus Ham-It-Up setup
[ Hits: 944 | Votes: 7 | Rating: 6.85 ]
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