15 meter
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Antennas : 160M- Magnetic Monster Loop Antenna for 160m
- A monster magnetic loop antenna for 160 meters band. This Magnetic loop is optimized for 1840 Khz + 50 Khz. PDF Article published on La Radiospecola 10.22
[ Hits: 831 | Votes: 2 | Rating: 10 ]
- Low Bands Battle Creek Antenna
- This antenna is designed for 40, 80 and 160 meters to complement a tri-band beam normally taken on DX peditions for 10, 15 and 20 meters, so six bands can be worked with only two antennas.
[ Hits: 136 | Votes: 0 | Rating: 0 ]
- Building a 40m Delta Loop Antenna
- An experimento of a 40 meter delta loop antenna both in horizontal and vertical polarization and several elevation angles with interesting notes about the effect of the radial field under the antenna.
[ Hits: 290 | Votes: 4 | Rating: 8.25 ]
- Short vertical for 6 meters
- A 30 cm antenna for the six meters band in japanese
[ Hits: 185 | Votes: 1 | Rating: 1 ]
- The Ramsay Dipole for 40 20 15 meters
- A multiband Fan Dipole that works on 40 20 15 meters band, making a folded dipole for 7 MHz band and additional element for the 21 MHz and 14 MHz
[ Hits: 395 | Votes: 4 | Rating: 8.75 ]
- Helical Antennas for 144 MHz
- This article is about two excellent small helical antennas for the two meters band.
With performance close to that of full sized antennas, these small helical antennas are low in profile but high in efficiency.
[ Hits: 227 | Votes: 1 | Rating: 7 ]
- Quad Loop Antenna for 50 MHz
- Building A Full-Wave Quad Loop Antenna for 6 Meters. This is an easy antenna to build and the materials cost about $15-20. It exhibits 1.8dB gain over a 1/2-wave dipole. Using an open-wire parallel feedline (commonly called ladder line) with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well
[ Hits: 195 | Votes: 1 | Rating: 1 ]
- Moebius style 80/40 m band antenna
- A loop antenna for 80 and 40 meters band, the main loop is based by a crossed line using aluminium strip lines. The main loop diameter is 150 cm.
[ Hits: 315 | Votes: 1 | Rating: 1 ]
- HF Multiband Moxon Antenna
- A project that describes a build a multiband wire beam antenna. A 3 band single feed moxon antenna for 20,15,10 meters.
[ Hits: 680 | Votes: 13 | Rating: 7.54 ]
- Home made multiband MOXON
- Multi band Moxon Yagi Antenna for 10,15,20 meters band with just one feed line. Drawing and project with dimensions
[ Hits: 472 | Votes: 0 | Rating: 0 ]
- Quad for 10 and 15 meters
- A light and sturdy Quad for 10 and 15 meters. Basic Quad antenna design considerations. Building and assembling a dual band HF QUAD antenna, designing and joining cross-arms and boom, assembling spreader and element wire installation notes. QST article.
[ Hits: 324 | Votes: 0 | Rating: 0 ]
- Linear Loaded Dipole for 15m and 20m
- A small dipole antenna installed inside a balcony. This linear loaded short dipole antenna has been designed at first for the 21 MHz and then adapted for the 20 meters band.
[ Hits: 615 | Votes: 2 | Rating: 4.5 ]
- A simple Attic Antenna for HF bands
- This simple antenna was installed on the attic. Antenna was matched with help an Automatic ATU in 40, 30, 20, 17, 15, 12 and 10 meter amateur Bands. The Antenna worked satisfactory on the above mentioned bands.
[ Hits: 309 | Votes: 7 | Rating: 6 ]
- PY2GN SDR Brazil
- WebSDR Pardinho SP Brazil providing access to HF bands 160 80 40 20 15 11 meters bands.
[ Hits: 132 | Votes: 2 | Rating: 7.5 ]
- SR4DON Web Radio Receiver
- OpenWebRX online radio receiver from Olsztyn Poland 10-15 meters bands, 50 MHz VHF UHF bands.
[ Hits: 183 | Votes: 1 | Rating: 10 ]
- NA4RR HexBeam
- NA4RR manufacture a six band hexagonal beam antenna for ham radio, covering 6, 10, 12, 15, 17, and 20 meter.
[ Hits: 156 | Votes: 0 | Rating: 0 ]
- Daily Sunspots groups
- All daily drawings of the sunspot groups and USSPS produced by INAF - Catania Astrophysical Observatory from 2009 up today are available in this page. The drawings of sunspot groups and pores are maken by a Cooke refractor (150mm/2230 mm) on a 24.5 cm diameter projected image of the Sun.
[ Hits: 80 | Votes: 0 | Rating: 0 ]
- Hy-Gain TH3jr Beam Manual online
- Hy-Gain TH3jr Tri-band HF 3 Element Beam Covers 10, 15 and 20 Meters assembly instruction manual
[ Hits: 178 | Votes: 2 | Rating: 5 ]
- QRP Portable Rig for 80-40 meters
- A home made portable QRP transceiver designed to work on 40 or 80 meters SSB band.
[ Hits: 192 | Votes: 0 | Rating: 0 ]
- Blocking Dynamic Range in Receivers
- An explanation of the different procedures and definitions that are commonly used for blocking dynamic range (BDR) measurements. Dynamic range in general is the ratio between the weakest signal a system can handle and the strongest signal the same system can handle simultaneously without an operator switching attenuators or turning volume potentiometers
[ Hits: 166 | Votes: 0 | Rating: 0 ]
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