hf signal

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hf signal

57 links

Antennas : Quagi
  • The Quagi Antenna Turns 40 - It has been 40 years since the VHF-UHF Quagi antenna--a combination of the desirable features of a Yagi and a cubical quad--was developed and the design was first published in the newsletter of the Southern California VHF Club, a forerunner of today's Western States Weak Signal Society.
    [ Hits: 329 | Votes: 1 | Rating: 10 ]
Antennas : Receiving
  • Small Loop Antenna Array for HF Reception - Receive-only loop antennas have some nice response characteristics that make them ideal when used for reception of skywave signals.
    [ Hits: 798 | Votes: 1 | Rating: 9 ]
DX Resources : Beacons
  • WSPR - weak signal beaconing - Introduction to WSPR beacons. Article describe WSPR2 and WSPR15 beaconing mode and include a frequency reference table for both WSPR modes
    [ Hits: 539 | Votes: 0 | Rating: 0 ]
Internet and Radio : Online Receivers
  • PSK31 HF Receiver in Charlotte NC USA - This PSK31 receiver shows you the active HF bands and tunes itself to the busiest for live decoding of the digital signal. Located in Charlotte, NC
    [ Hits: 2492 | Votes: 16 | Rating: 2.38 ]
Manufacturers : Antennas : HF : Active antennas
  • Broadband Power Technology - Active Receiving Antennas, designed for reception of shortwave, mediumwave and longwave signals and VHF/UHF signals
    [ Hits: 265 | Votes: 0 | Rating: 0 ]
Manufacturers : QRP Kits
  • HF SIGNALS - Makers of QRP HF General Coverage Transceiver you can build. The Home of BITX transceivers, µBITX General Coverage Receiver-Transmitter. . A general coverage, 10 watts HF SSB/CW transceiver kit with features you NEED for operating ease, convenience and versatility. It works from 3 MHz to 30 MHz, with up to 10 watts on SSB and CW, with a very sensitive receiver.
    [ Hits: 137 | Votes: 1 | Rating: 10 ]
Operating Modes : FT8
  • FT8 Operating Guide - Weak signal HF DXing - An excellent guide to operating FT8 mode available in English, German and Czech that cover several aspects of the FT8 operations. Includes and exaustive guide to how configure FT8 software, how to conducto a QSO and how to operate DXPeditions in FT8 F/H mode. Covers aspects of FT4 contesting operations and interfacing with logging programs
    [ Hits: 175 | Votes: 0 | Rating: 0 ]
Operating Modes : Weak Signal
  • JT65A - weak-signal digital mode - A very exaustive and complete article on JT65A and JT65-HF operating mode, including software download links, installation notes, how to make JT65A QSO and videos to correctly work with weak signals by NW7US
    [ Hits: 532 | Votes: 2 | Rating: 10 ]
Propagation : MUF Indicators Shopping and Services : Regional : Europe : Spain
  • Big Signal - Amateur Radio HF Cubical Quad and Delta Loop antennas manufacturer based in Spain
    [ Hits: 780 | Votes: 0 | Rating: 0 ]
Software : JT65
  • WSJT-X Download Page - WSJT-X - Weak Signal Communication, by K1JT - offers specific digital protocols optimized for EME (moonbounce), meteor scatter, and ionospheric scatter, at VHF/UHF, as well as for LF, MF, and HF propagation. The program can decode fraction-of-a-second signals reflected from ionized meteor trails and steady signals more than 10 dB below the audible threshold. WSJT-X incorporates nearly all popular capabilities of programs WSJT and WSPR, while adding comprehensive rig control and many other features. Open-source, download latest version for Windows, Linux, Macintosh OS X.
    [ Hits: 4953 | Votes: 28 | Rating: 6.21 ]
Technical Reference : Receivers
  • LF to HF Converter - This converter uses the popular NE602 mixer/oscillator chip and allows reception of signals below 500 kHz on a 3.5 4 MHz HF receiver
    [ Hits: 536 | Votes: 0 | Rating: 0 ]
Technical Reference : Receivers : Crystal radio
  • UHF Crystal Radio - A simple UHF Crystal Radio wired up to check for reception of VHF/UHF signals in the vicinity of the shack.
    [ Hits: 540 | Votes: 5 | Rating: 7.6 ]
Technical Reference : Repeater
  • Cross Band Repeaters - Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
    [ Hits: 144 | Votes: 0 | Rating: 0 ]
Technical Reference : Software Defined Radio : RTLSDR
  • 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: 855 | Votes: 6 | Rating: 7.83 ]
Technical Reference : Test Equipment
  • Antuino - Antenna Test Equipment - Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).
    [ Hits: 205 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : Signal Generator
  • HF signal generator - A home made project for a 3 to 12 MHz signal generator
    [ Hits: 667 | Votes: 2 | Rating: 7.5 ]

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