low band radio59 links
- The TTFD-2 antenna
- The lowest-cost approach for home brewing broadband, general-purpose antenna for shortwaves
[ Hits: 6385 | Votes: 19 | Rating: 7.58 ]
- QM5 Yagi for 2 meters band
- The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
[ Hits: 6518 | Votes: 4 | Rating: 5.25 ]
- QM7 7 elements 144 MHz Yagi-Uda Antenna
- The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
[ Hits: 5208 | Votes: 15 | Rating: 5.27 ]
- 80M Vertical antenna with capacitance hat
- Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
[ Hits: 23851 | Votes: 23 | Rating: 7.05 ]
- Low reactance multiband center feed wires
- An antenna system is more easily interfaced to a radio when the input reactance at the feedline terminals is low or close to series resonance
[ Hits: 2873 | Votes: 5 | Rating: 8.80 ]
- A Small Wire Loop Antennas for 160 meters
- Low noise, receive only coax loop antennas for 160 - 10 meters HF bands
[ Hits: 46695 | Votes: 8 | Rating: 6.75 ]
- CB Quad antenna
- A low-cost and easy to build Quad antenna tuned for CB band on 27 Mhz.
[ Hits: 24219 | Votes: 54 | Rating: 6.10 ]
- Cubic Quad
- The cubic quad is a very popular way to get reasonably high gain and excellent front to back ratios as well as low angles of radiation for without going to extreme heights. Includes design for 2 6 10 12 15 meter bands
[ Hits: 66540 | Votes: 57 | Rating: 4.73 ]
- EI7BA's Amateur Radio Pages
- Multi Band Quad,Cushcraft R5, R7, R7000, repair and maintenance, Remote Antenna Switching, Hexagonal Beam, Automatic Band Decoder, Low Band Verticals, Crank-up Tiltover Tower etc
[ Hits: 13695 | Votes: 20 | Rating: 7.60 ]
- K5ZD contest audio recordings
- Have you ever wanted to listen in on a serious SO2R DX contest effort? hear what the low bands sound like from New England? enjoy a contest without having access to a radio? This is your chance!
[ Hits: 1907 | Votes: 2 | Rating: 9.50 ]
- Radio Filters.Com
- Low Cost FM Notch Filters: Radio Filters.com, manufactures frequency control products including band pass, notch, reject, electronic filters
[ Hits: 726 | Votes: 6 | Rating: 6.83 ]
- Giovannini Elettromeccanica
- Quad, Yagi for low bands. Specialist in antennas, supports and moving of medium-large sized radio antennas, professional rotators, masts, towers, and accessories.
[ Hits: 8394 | Votes: 14 | Rating: 6.86 ]
- Heros Technology Ltd
- HF Radio Preselectors,BCB filters,Low Pass filters,Band Pass filter
[ Hits: 477 | Votes: 1 | Rating: 10.00 ]
- FAX480 was developed to provide for relatively high resolution image transmission on HF, VHF, and UHF amateur radio bands. FAX480 was designed to bridge the gap between conventional slow scan television (SSTV) and conventional facsimile techniques.
[ Hits: 545 | Votes: 1 | Rating: 6.00 ]
- About AMTOR
- AmTOR may be considered as the next development from RTTY. AmTOR was introduced to overcome the problems with RTTY. As a result of its performance, it has become popular on the HF bands because it gives more reliable communication, especially when interference is present. It achieves this by using a coding system that allows errors to be detected and corrected.
[ Hits: 240 | Votes: 0 | Rating: 0.00 ]
- Radio waves below 22 kHz
- Exploring ULF-ELF and VLF radio band
[ Hits: 1125 | Votes: 5 | Rating: 7.60 ]
- 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: 12680 | Votes: 42 | Rating: 6.96 ]
- Super-Duper for Listeners
- SDL is a dedicated contest logger for SWLs. It's good for all the major international contests and for dozens of others worldwide. SDL is fully working and unrestricted, and is distributed as freeware. It links to Icom, Kenwood and Yaesu radios to follow band and mode changes.
[ Hits: 1295 | Votes: 3 | Rating: 7.00 ]
- EchoFilter uses the soundcard of a PC to process income audio signals in real-time. The narrow filter bandwidth allow the extraction signals and sounds from the audio signal that may normally be close to inaudible.
It is intended for radio HAMS, hobbyists, researchers, scientists and students in the DSP field.
[ Hits: 6881 | Votes: 10 | Rating: 6.01 ]
- Freeware real time DSP filter particularly for applications of amateur radios , IIR, FIR filter, low-pass, high-pass, band-pass filter, band suppressor (notch filter) individually adjustable
[ Hits: 5851 | Votes: 14 | Rating: 8.14 ]
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