hf signal

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hf signal

54 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: 268 | Votes: 0 | Rating: 0 ]
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: 740 | 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: 475 | 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: 2428 | 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: 229 | 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: 488 | 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: 704 | 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: 4203 | Votes: 22 | Rating: 6.27 ]
Software : Weak Signal
  • WSJT-X - WSJT-X if a software that offers specific digital protocols optimized for EME, 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. Popular modes includes FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR
    [ Hits: 530 | Votes: 3 | Rating: 4 ]
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: 491 | 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: 446 | 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: 98 | 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: 619 | Votes: 2 | Rating: 7.5 ]

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