The Clemens match is easy to make and reliable, and is preferable to a single Gamma match as it is balanced. I was first introduced to the Clemens match by G4IGO several years ago, Ken builds his in a slightly different way by putting the capacitor at the feeder end and connecting the far end…
Author: Simone
Born in 1970 currently live in Florence Italy.
Married with 2 childrens work as IT Technician.
SWL longwires
Taken from a usenet post by John Doty in 1996 In article <9612182335114148@mogur.com> len.anderson@mogur.com (Len Anderson) writes: > TV>> I wonder if a longwire balun would help match the impedance & provide a> TV>> better signal? > No, it will (primarily) change only the magnitude of the antenna> impedance over frequency. Some bands will have…
Halo for 6 meters band
A good antenna that can be used for the car as well as the house is an HALO. This antenna maintains good omni-directional horizontal polarization. Basically the antenna is a half wave dipole bent into a circle,BUT shorter than a dipole for this frequency. The circumference is 60-70 inches. By useing the gamma match (see…
6m J-Pole by WB5CXC
Use a 54” piece of 450 ohm Ladder line. Cut out 3 inches of the center part of the ladder line. Solder a PL-259 on the bottom of the Ladder Line (both side of the ladder line will solder on the ground side of the PL-259 – this is used for the shorted part of…
VX-7R modification
Mars Cap and freeband modification for the VX-7R transceiver
J-pole Antenna Revisited Yet Again
I recently had a conversation on the radio with another Ham who had built a 6 Meter wavelength band “J” antenna. He was getting some rather strange performance from this design, so I asked him where or how he had come up with the antennas dimensions. He referenced an Internet web page to me where…
Frequency Filer
Frequency Filer is database program designed for people who use a great many different radio frequencies. It is primarily intended for amateur radio operators, shortwave listening enthusiasts, and scanner users. The program makes it easy to keep all of your important frequency information in one place. Geographic information can be displayed on a high resolution…
Perfect Ground vs. Poor Ground. What is the difference?
FIG. 1 shows the relative gain (loss) of an antenna (e.g., dipole or beam), under varying ground conditions, through the frequency range of 5-30MHz: A represents the curve under perfect ground conditions, B under average ground conditions (i.e., wet grassland), and C under poor ground conditions (dry desert). Note that the influence of ground conditions…
G5RV Antenna
This article reports the results of searches performed on the G5RV antenna. As stated in several articles concerning the G5RV antenna an specially in old French books written by R.A. Raffin, F3AV and R. Piat, F3YX and more recently. Unfortunately years have passed and I only kept in memory that at the bottom of the…
80m Loop EZNEC Analysis
Antenna data, and design note for this horizontal loop antenna resonating on 80 Meters by K0ZE