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Low Bands aplifiers LNA 1.8-3.8MHz
As an amplifier I used the famous 2N5109 for its excellent features of high OIP3, low noise figure in push -pull configuration.in input to the preamp I put a bandpass filter that passes the signals of the two low bands 160 meters and 80 meters , but which cuts the AM broadcast frequencies to about 600KHz, the frequencies of 40 meters and above. Possibly the filter can be removed and the preamplifier can make the whole band from 200 KHz to 30MHz
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The first thing to do is to determine the frequency at which the antenna is to be operated. In my case it is 7.171 MHz. 1/4 of a wavelength is the equivalent of 90 degrees of the full 360 degree - single cycle waveform
This is the best receiving antenna for my location. It is small and very directional. The pennant is oriented to europe and can notch out 59+ 20 db signals to S-0. It dramatically reduces the stateside interference while improving the SNR on the low bands towards europe
La caratteristica principale, che mi fa preferire Flag, Delta e Pennants rispetto alle Ewe e K9AY loops, e' la loro indipendenza dalla terra, alla quale non c'e alcuna connessione
Anyone attempting to work DX on Top-Band 160 Meters soon learns of the need for a good receiving antenna
This is a specialized receiving antenna, omni directional and thus with a low RDF, but with low sensitivity to vertical polarized noise and, my worst problem, to local AM broadcasting signals
PSION Greyline Clock PSION Greyline Clock v. 1.0 is a UTC/Local clock showing sunlight/darkness area on the world map
Radioassistance Radioassistance E Kenwood Dealer, vendita ricetrasmittenti, antenne, parti di ricambio, elettronica
SunCalc SunCalc - sunrise, sunset, shadow length, solar eclipse, sun position, sun phase, sun height, sun calculator, sun movement, map, sunlight phases, elevation, Photovoltaic