For nearly a year, i have been trying to develop a tuned radio frequency trf 10 mhz, wwv, am receiver, my initial rf stages were common emitter or common source stages with tuned input and outpu

This is a very sensitive 50Mc converter allowing you to receive the entire Magic Band 50Mc-52M

This is the completed antenna. in this view, you can see the pvc pipe mast and cross-arm assembly which supports the two turn catv cable loop

With this very simple receiver, many radio amateur stations can be heard with a wire antenna of 5 meters, the receiver is tested on 80, 40, 30 and 20 meters

I chose to build the triangular loops because they are cheap, easy, broadband, and exhibit a bi-directional pattern on the lower bands

NDBs or Non-Directional Beacons inhabit 190kHz to about 500kHz, the large majority being between 200 - 430kHz

You can tune into LF activity with this easy-to-build and erect active antenna

Valutare e provare quei circuiti tanto odiati e tanto amati che si chiamano antenne attive

With the low bands benefitting from the current sunspot minimum, receive antennas are important fordxers

L'attenuatore ad impedenza costante è un accessorio che risulta particolarmente utile ogni volta che si abbia la necessità di interporre in una linea di trasmissione una attenuazione nota e regolabile del segnal

La realizzazione davvero semplice, di un attenuatore passivoche ho dovuto utilizzare per controllare l'ampiezza del segnale in antenna

My early antennas were nothing more than hundreds or thousands of feet of very thin magnet wire, strung over tree limbs

Keep Beverage wire ends away from towers, that can re-radiate signals, even if they are not used as transmit verticals

For a beverage to work reasonably well you need at least 1 wavelength of wire, on 160 meters that's 490 feet of wire in as straight a line as possible

Obtaining the best signal transfer from an antenna to the typical 50-ohm receiver input over a wide frequency range

This article describes a loop made with seven feet of six-conductor shielded cable formed into a circle and with the conductors connected in series to form a 6-turn loop

Dual-flag receive antenna, the antenna is made up of two rectangles 30-feet long by 20-feet tall, the telephone pole is set up to accommodate a total of 3 or 4 flags aimed in different directions

Ferrite Rod Antenna Amplifier for loop antenna

The flag antenna is in the family of terminated loops that can yield a cardioid heart-shaped, single-direction null pick-up pattern, its name comes from its horizontal rectangular shape

Haarp stands for high frequency active auroral research program is a civilian and military installation located in the united state

A multi-band DX antenna for the 160m-40m amateur radio bands with low visibility but great performance for long distance communication

Low-band are always looking for ways to improve their hearing

Ala1530 broadband active loop antenna

A small active antenna the size of my foot instead of a 5 meter long whip antenna

There are claims circulating that placing an antenna at very low heights enhances nvis operation, or that an antenna has to be very low to be an nvis antenna

The noise cancelling system to be described here consists of the Main Station Antenna receiving a wanted signal and associated QRM and a separate

Dpdt relay, 510-ω termination ac coupled water tight box lowes all stainless steel hardware

Sostituzione alimentatore per antenna-wellbrook-ala-1530ln su schema LM317 con trasformatore

Conquesto nuovo accessorio,idisturbi locali finoa S9 possono essere quasi completamente eliminato

The loop has been instrumental in achieving two notable low-frequency receptions the first trans-pacific reception of ZL

The wwvb broadcasts are used by millions of people throughout north america to synchronize consumer electronic

Finding a good, inexpensive antenna for receiving WWVB can be a challenge

A single-turn small loop antenna comprised of a hollow conductor arranged in a closed shape

Shielded-Loop antennas have some nice properties that make them desirable as portable receiving antennas

After trying various types of loops ie multi turn loops,flags,pennants etc i have found the flag antenna best suited

After trying various types of loops ie multi turn loops,flags,pennants etc i have found the flag antenna best suited

The basic design of a single loop in an easy-to construct quasi-delta loop configuration

Advanced beverage antenna designs long wire receiving

This converter allows reception of six metre signals on a two metre receiver, it should therefore be useful for those with single or dual band sets that do not cover 50 mhz

One popular claim is that vertically polarized antennas are noisy, while horizontally polarized antennas are quiet

Small loop antennas have an overall wire length 0.15λ