| PA0SNY |
Antennas (Present and Past)
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 mainly the antennas that I have used since
I started as Radio Amateur. See the Library page for Antenna Constructions
| Antenna
picture (icon) |
Description |
Remarks |
 |
The Diamond
V2000 is an
ideal antenna for my Yaesu FT-8900. Although I bought it with the
multiplex
filter, I don't use it now. It goes straight into the
receptacle. The only thing that can be adjusted is the counter poise
(radial) for 6 meters. Further, I use the antenna for reception of the Airband (118 - 137 MHz) on my FT-8900, FT-897D and the SDRPlay. Although it has no ideal resonnance there, it works fine so close to Schiphol Airport |
The V2000 is
an antenna with
some complexity. SWR should be considered as 'reasonable', as it has some parts of 70 cm where it is over 1:1,75. 6 meters and 2 meters are OK. The current V2000 is leased from PA3GDF and is due to be replaced in 2025. My first V2000 served over 30 years, had a radial modification, but failed (2 C's) Repair was not succesful |
 |
The End
Fed Half Wave antenna. The
one you see here is the one that I bought by HyEndFed Company. The
total antenna length is around 23,5
meters. The feeding point is on the mast of the V2000. It then towards
a
fiberglas
pole on the roof deck in the backyard. The last part runs to a high
metal pole. SWR is fine on all 'classic'
bands and 12m. For 80 meters the antenna is perfect for the higher 120
kHz. For
the lower
part the AT-200 Antenna Tuner is required. |
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)
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 |
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. |
 |
Combi
2m/70cm for the car This is an antenna to be used on
the car for 2m and 70cm, either by fixed (Kathrein) base or magnetic
base. The working part for 2m is a 1/4 lambda, for 70cm it is 5/8. 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 |
This antenna
became a project of the ProjectGroup PG.540. Jos, PA3GDF created a
template made of a composite material which was used to create the
curl in the antenna wire. We used 2mm welding wire. 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). |
