About J-POLE ANTENNAS by Mike Walkington, VK1KCK The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which…
Author: Simone
Born in 1970 currently live in Florence Italy.
Married with 2 childrens work as IT Technician.
5 Element full size Yagi for 20 meters
The following are construction details of a 5 element 20 meter monobander antenna originally published by VE3GK. However, this particular yagi was run through a computer program and performed very well. It was also scaled to 70 cm on a test range by the late VE3UD, Bud Punchard and the results compared with the computer…
TS-870S Remote control
Freeware Kenwood TS-870 Control Program developed by EC4DFP Download TS-870S.Zip (1.7 Mb)
2 Element Yagi for 50 Mhz
G3SYC designed this antenna in about 1990. The antenna works best between 15 and 20 feet off the ground, and can be worked some nice dx with it. The antenna is easily folded up and stored away when not in use, and has a minimal impact when erected . SPACING Inches ELEMENT LENGTH (Inches) …
HF Mobile multiband antenna
VE3GK posted this interesting project about an HF Mobile multiband antenna. Can be remotely tuned.
A 50 Ohm Dummy Load
This idea came about after listening to all you Amateurs tuning-up your amplifiers while on-air.It always happens right in the middle of receiving a good SSTV picture! This may give you the idea of building your own (cheap) dummy load and do your tuning through this.You can subsitute the shown value components to handle your…
Some Tips on Sound Card Interfacing to Your Rig
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…
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…