Just clear tips for every day


What kind of antenna do I need for a shortwave radio?

What kind of antenna do I need for a shortwave radio?

An outdoor shortwave antenna will always give better results than an indoor one. A random length outdoor wire antenna installed as high above ground – and as far away from buildings and power lines as possible – will generally give quite satisfactory results.

How long is a shortwave antenna?

The length of the antenna needs to agree with the length of the longest radio waves that you want to receive. Shortwave broadcasters use frequencies that are from about 50 to about 400 feet long, and an effective antenna needs to be at least one-fourth of that length — and one-half is much better.

How can I improve my shortwave signal?

Most shortwave portables radios on the market today have a telescopic whip antenna that will suffice for casual listening. But often you can increase the antenna gain by simply adding more length in the form of a simple thin wire. Keep in mind that many radios actually ship with a clip-on antenna wire.

What is one disadvantage of a random wire antenna?

One disadvantage of a directly fed random-wire antenna is that you may experience RF burns when touching metal objects in your station. The simple single wire length of the random-wire antenna acts as both feed line and antenna and is directly connected to the transmitter.

Does a long wire antenna have to be straight?

The wire may be straight or it may be strung back and forth between trees or walls just to get enough wire into the air. Due to the great variability of the (unplanned) antenna structure, effectiveness can vary wildly from one installation to another.

Are there any shortwave stations left?

At the moment the major shortwave broadcasters are BBC, Voice of America, All India Radio, China Radio International, Radio Japan, Radio Romania, KBS Korea and Voice of Turkey and many more.

How long should a long wire antenna be?

It is important to use a counterpoise. A standard recommendation (see QST, March 1936, p. 32, “An Unorthodox Antenna”) is an 84′ long end fed and a 17′ long counterpoise (6.5′ for 20m)….Wire Lengths for Various Band Combinations.

Group USA Bands
a 40-30-20-15
b 40-30-20-17
c 40-30-20-17-15-12-10
d 80-40-30-20-17-15-12-10

Can insulated wire be used for antenna?

Since most antennas are used outdoors, you must use outdoor-rated wire. You can use uninsulated wire, but it is much better to use insulated wire for safety purposes if there is any chance that someone could come in contact with the wire while you are transmitting.

Is it worth buying a shortwave radio?

If you want a complete shortwave experience so you are able to listen to amateur broadcasters and communications from all around the world, it’s worth the cost. Overall convenience. Other than the more technical stuff, you should consider features that make a radio fit your specific needs or interests.

What is a magnetic loop antenna?

A magnetic loop antenna is a winding of copper wire around a frame (for air-core loops) or around ferromagnetic material (for ferrite loops). A loop antenna is actually sensitive to the magnetic field and not the electric field (it is also called a magnetic loop). It outputs a voltage proportional to that field.

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