4 meter
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Antennas : 10M- 28 MHz 3 elements Yagi
- OZ2OE Technical pages, a 3 element 28 MHz light weight Yagi for 10 meters band
[ Hits: 5567 | Votes: 8 | Rating: 4.37 ]
- Car Roof Antenna for 20 meters
- A project by G3LDO about a car roof antenna for the 14 Mhz
[ Hits: 3895 | Votes: 0 | Rating: 0 ]
- A double dipole for 14 and 21 MHz
- A double dipole for the 20 and 15 meters band in french
[ Hits: 4624 | Votes: 9 | Rating: 4.78 ]
- 14MHz Inverted Vee Dipole
- Inverted vee dipole antenna for 20 meters band by VK1OD
[ Hits: 6447 | Votes: 13 | Rating: 2.39 ]
- 20 meters rigid dipole
- Rigid Dipole antennas for 14 MHz band using PVC and Aluminium tubing
[ Hits: 7007 | Votes: 14 | Rating: 6.57 ]
- Vertical moxon for 14 Mhz
- A vertical Moxon with different feeding for the 20 meters
[ Hits: 7157 | Votes: 5 | Rating: 7.8 ]
- 7 element Yagi for 20 Meters band
- A 7 elements yagi beam monoband antenna for 14 Mhz by VE3GK
[ Hits: 3209 | Votes: 3 | Rating: 2.67 ]
- 6 and 2 Meter Square Copper Dipoles
- In this eHam article you will find parts list and dimension sheet for a 2m square dipole, made from copper plumbing fittings and 1/2 inch copper water pipe.
[ Hits: 7075 | Votes: 6 | Rating: 6.33 ]
- Ground Plane for 7 MHz
- How to build a ground plane antenna for the 40 meters band in french
[ Hits: 3146 | Votes: 2 | Rating: 7 ]
- 40 meter Moxon by SM0DTK
- A wire moxon antenna plan for the 7 Mhz
[ Hits: 7757 | Votes: 19 | Rating: 7.1 ]
- Vertical Moxon for 40 meters
- A vertical half-moxon for the 7 Mhz by F6IRF
[ Hits: 2824 | Votes: 1 | Rating: 7 ]
- Vertical Antenna For 40- 80-160 Meters
- The basic antenna is a vertical monopole, using elevated radials to complete the ground plane by k5oe
[ Hits: 4296 | Votes: 6 | Rating: 6 ]
- 4 element yagi for 6 meters
- Project plan for a 4 element yagi beam for 50 Mhz
[ Hits: 2187 | Votes: 5 | Rating: 3.2 ]
- Another vertical antenna for 30, 40 and 80 meters
- This article is to describe a multi band DX-dedicated antenna offering a minimum of compromises (such as lossy traps), for the hams not having any high-support
[ Hits: 4375 | Votes: 4 | Rating: 3.5 ]
- Inverted L Portable Antenna
- An 87ft inverted L portable antenna working on 80 40 30 20 15 meters band
[ Hits: 2400 | Votes: 3 | Rating: 9.33 ]
- The FD4 Windom antenna
- This antenna originated from darc QRV magazine in 1971 should be attributed to DJ2KT, works on 80 40 20 10 meters without ATU, based on the Windom principle.
[ Hits: 3741 | Votes: 3 | Rating: 8 ]
- 3 element portable Yagi for 2 meters
- The I DX is a homemade 3 element portable Yagi-UDA ante a for 144 MHz
[ Hits: 6554 | Votes: 10 | Rating: 5.6 ]
- Digital SSTV images
- HAMDRM pictures received on 80 meters band at 3733 KHz
[ Hits: 291 | Votes: 2 | Rating: 10 ]
- Spectrum Analyzer Real-time FFT
- Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.
[ Hits: 11311 | Votes: 9 | Rating: 7.77 ]
- 144 MHz PA with MRF317
- A 2 meter power amplifier
[ Hits: 8925 | Votes: 17 | Rating: 4.47 ]
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