| PA0SNY |
Antennas
My HAM equipment covers a range of frequencies and applications.
My activities run from 80 meters till 70 centimeters, so 'only' from 3.5 to 440 MHz
No extreme 'Lows' for me, nor extreme 'Highs'.
As we have only a small town garden, my antennas are practical solutions.
In the information below, you'll find the antennas that I use currently.
See the Library page for Antenna Constructions
| Antenna |
Description |
Remarks |
V2000 50MHz 144 MHz 420 MHz |
 |
The picture
tells it all: The mast is secured on frame with concrete tiles
(40x60cm). On the background is the historical kathedral (1520!) The small cubic box is the 1:49 trafo for the endfed, that is just visible. Antanna is use on my FT-8900, my FT-897D and the IC-7300 Further, I use the antenna for reception of the Airband (118 - 137 MHz) also on the SDRPlay. Although it has no ideal resonnance there, it works fine so close to Schiphol Airport |
| EndFed Half Wave for 40m and with coil and extra wire also for 80m 10m 12m 15m 20m 40m 80m |
 |
Making the
High End Fed Antenna
from the kit, requires adjusting and measuring. My experience is that
when you cut it to perfection for the
10 meter band, it will be well
within the 1:1,5 range for 15, 20 and 40 meters as well, beit that the
1:1 dip can be just outside these bands. So, don't pin yourself to get
it that inside the band, but make sure that 10 meters is OK first.
Finally the 110 µH
coil and the 3+ meters are adjusted for 80 meters. I
fold back the last 25 or so centimeters, so that it can be used later
for lower frequencies. See my library for documentation on how the
Antenna was measured and adjusted. |
| Half Wave dipole antenna with Gamma Match for 4 meters (70 MHz) |
 |
I bought it
in 2000 (or so) because
I liked the construction. But never used it, untill the 4 meter band
came to the Dutch HAMs. In 2021 I finally came up with this construction
for 4 meters. This antenna was purchased as "Model SD-FM Dipole 87-194 MHz" by Sirio. The modification of this Gamma Match for use on 4 meters was a challenge, as not all dimensions are available on the Sirio website. See my library for a publication of this 4 meter Antenna. Better pictures are in de the pdf for the construction |
| Combi
2m/70cm for the car |
|
I have used both
the fixed and magnetic based antennas, but now only the magnetic
base is used in combination with the CRT-Electro UV (see equipment
page). The antenna is based on an article in Electron (Dutch amateur magazine) from October 1989. I made swr graphs in 2005, and these can be found here |
