Receiving antenna system at OZ8ABE.
For years I
believed that I could hear the grass grow out here in the rural area.
It wasnít until OZ1LXJ showed that there was level beyond called
Beverage antennas. So just before
VP6DX was about to show up I contacted the owner of the property next to mine to
hear if I could use his field for an antenna experiment. He said yes, go ahead
without even asking anything, just telling me that it should be gone when it was
time to work on the field. (TNX to Leif Pedersen for being such a friendly
neighbor). VP6DX was an armchair
copy with the setup so that encourage me to do some more.
My friendly neighbor did suggest that I could install the system a little
further away which would give me the opportunity let it stay all year.
I could only say YES !!! Thank you.
So now Iíve got a setup of 3 beverage antennas as you can see below.
The red marked beverage is heading towards Asia and parts of Pacific and is about 180m long. The blue marked beverage is 260m long and pointing towards South America and long path Pacific. The pink marked beverage is 210m long and pointing towards North America and the Caribbean. They are a at bit to short for 160m but still doing the trick and opened a new World to me on the lower bands. They work great on 40, 60 and 80m.
consists of a switch (white box) in the shack and a (black) box outside where
the beverage antennas meet the coax. The switch inside does also include a front-end-saver.
The green and red led shows if itís either beverage one or two thatís
active. The yellow led shows that
the front-end-saver is on (PTT active). The
2 beverages should be connected to the 2 red connectors on the black box. The
SO-239 is for the coax and yellow connector is for grounding.
There is a led on the black box that shows which beverage is active.
Itís all powered from my Yaesu FT-2000 (The pic. shows my good old FT-1000). TNX to OZ1LXJ for taking the time to create this. The coax is connected to the RX SO-239 on the Yaesu FT-2000. It's so simple to work with, mainly because the FT-2000 remembers the settings. So if the RX antenna was ON last time on let's say on 160m it will remember this next time I'll go to that band. If suddenly something shows up on a band where a beverage wouldn't be of any help, then it does switch automatically to an other antenna.
I have chosen to place the feeding point of the beverage antennas on the center south side to give as much length to the antennas in 3 directions. You see the beverage antennas being placed on bamboo sticks about 1,8m above ground level. If you place it higher then it will receive a lot of high angle noise, if itís lower signals will be very weak. The wires are mainly WD-1a (army telephonewire), but some meter of standard copperwire have sneaked in as well. OZ1LO did bring me 2x750m WD1-a from his last trip to Friedrichshafen (TNX) and I hope I can exchange some of the beverages which have been put together by bits and pieces and also to put up some new ones in other directions. So with the switch shown above and a standard antennaswitch inside the shack I can controle up to 6 beverages.
As you can see on the picture below, there is light at the end of the tunnel. The USA beverage goes through a whole lot of Christmas treesÖ
Finally all the beverage antennas are terminated (grounded) through a 700 Ohm resistor including a device to ground static collected on the antenna as well. It's all sealed.
Future plans will be to make experiment with a pre-amp system for the beverages.
During the winter season some extra beverages are placed on the field. A 220m long towards North, a 210m NNW, and a 200m towards NE. You can see these three on the pic below and this also gives you idea about the sloping of the area. Removed these 3 bevs. today (Mar. 29, 2010) but they will be up and running again in the October.
Behind it's the 340 dregr. in the middle 0 degr. and nearest 40 degr.
return to main page