Originally, I set out to simply to record and play back received audio in cases where it was necessary to let other stations hear their own signal as accurately as possible. I soon discovered that there is software out there that also allows SSTV and RTTY via the sound card as well. Most likely there…
Author: Simone
Born in 1970 currently live in Florence Italy.
Married with 2 childrens work as IT Technician.
Simple double-quad Antenna
A simple 2.4 GHz double QUAD Antenna
Why Are Antennas Built to Look Like They Do?
We come to recognize the proportionate shape and appearance of antennas. If we see a half wavelength dipole we recognize it for the antenna it is. When we see a Ground Plane antenna we know what it is. Its just the same as when we see a Ford automobile next to a Volkswagen we know…
Low Noise Antenna Connection
From: jpd@space.mit.edu (John Doty)Newsgroups: rec.radio.shortwaveSubject: Low Noise Antenna ConnectionDate: 26 Nov 1993 16:55:24 GMT It doesn’t take very much wire to pick up an adequate signal for anything but the crudest shortwave receiver. The difference between a mediocre antenna system and a great antenna system isn’t the antenna itself: it’s the way you feed signals…
Antenna mounting height – the higher the better?
For someone surrounded by houses, power lines and trees, a 30m/98ft high tower is desirable. A high tower is also desirable for someone situated on perfectly reflecting ground, such as saltwater. However, in most “real world” cases, the 30m/90ft height is less advantageous than you might think. Why is this the case? The angle of…
70 cm Quagi Antenna
This was my first AO-10 antenna. As goofy as it looked, I managed a few contacts with 10 Watts, including Brazil on SSB. This is a pair of 8-element quagi’s, set up for RHCP. Construction is simple, with no critical tuning elements. They are made from 1/2″ PVC pipe and # 10 wire (stripped from…
G5RV more ideas
The G5RV multiband antenna is a very popular design on the HF bands. The “common” G5RV is configured as a 3/2-wave dipole on 20 meters, and works as either a shortened dipole, or a collinear-fed long wire on the other bands. In this configuration, the overall length is 102 ft, with a 28 to 34…
Beverage antenna information
The Beverage (or “wave”) antenna was invented in the early 1920s by Dr. Harold H. Beverage. It was first discussed in a paper titled “The Wave Antenna – A New Type of Highly Directive Antenna” written by Beverage, Chester W. Rice and and Edward W. Kellogg for the journal of the American Institute of Electrical…
3 Eelements Yagi beam for 6 meters
Spacing between elements are 34 and 1/2 inches. The elements are 1/2 inch aluminum tubing of 1/16-inch wall thickness.(you can cut up an old TV antenna they work great). The Boom length is 72 inches (6 feet).The boom is 1 and 1/4 inch tubing. You can attach 50 ohm coax to this antenna after you…
20 meters QRP Dipole
This is a portable dipole I built for 20 meters. It works great. The SWR is really low. I would not recommend this for permanent use just because it is not build like a rock. It will do just fine for portable in the field operation. It is a great backpacking antenna. I only used…