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Antenna G5RV
It is a multiband antenna which is similar to a center-fed or a Levy antenna of particular dimensions chosen to obtain a low impedance on frequencies close to 3.5 7 and 14 MHz
post 15 Sep 2024
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Building The Lazy H Antenna
The Lazy H is probably the most elementary form of curtain antennas. The lazy-H usually consists of two horizontally polarized doublet or dipole elements, although with some loss in earth reflection gain it can be oriented vertically as an "H"
Broadband Antennas
The advantages of a broadband antenna are obvi-ous—fewer adjustments during tune-up. For some of the new broadband transceivers andamplifiers, a broadband antenna means no tune-up at all
Carolina Windom antenna
Here is my home HF antenna. It is an off centre fed dipole, with 10 feet of vertical radiator. It needs no tuner on 40m, 20m and 10m
Cobwebb 10-12-15-17-20 meter Building The Antenna
This antenna, I made, not only covers 10-20m but tunes quite well to 40 and 80, has a reasonable swr at 6m! and a good swr from 120Mhz to over 150 Mhz
Diamond w8010 banden 80-40-20-15 en 10 meter
The antenna described here is known by different names. It is a combination of two dipoles that are shortened with coils and thus cover the tires 80-40-20-15 and 10 meters and yet still have a fairly small size
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The Lazy H is probably the most elementary form of curtain antennas. The lazy-H usually consists of two horizontally polarized doublet or dipole elements, although with some loss in earth reflection gain it can be oriented vertically as an "H"
The advantages of a broadband antenna are obvi-ous—fewer adjustments during tune-up. For some of the new broadband transceivers andamplifiers, a broadband antenna means no tune-up at all
Here is my home HF antenna. It is an off centre fed dipole, with 10 feet of vertical radiator. It needs no tuner on 40m, 20m and 10m
This antenna, I made, not only covers 10-20m but tunes quite well to 40 and 80, has a reasonable swr at 6m! and a good swr from 120Mhz to over 150 Mhz
The antenna described here is known by different names. It is a combination of two dipoles that are shortened with coils and thus cover the tires 80-40-20-15 and 10 meters and yet still have a fairly small size
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground