Portable with my ham friend Chris,OE5CCN, using 200w and a cubical quad for 10m during the Oceania Contest, 1000m above sea level.What a great day!!
Ultrabeam UB-50-3 element dynamic yagi from 10-20m, rotary dipole for 30/40m (U shape).
The antenna is broken at the moment, the reflector motor does not work, so it´s just a 2 element now.The 30 and 40m rotary dipole is not working either, because it´s included in the reflector motor.
I put up a fixed dipole for 30m and a sloping delta loop for 40m.The delta loop is fed in the corner, favouring Europe a bit and it´s very interesting to switch between the delta loop and the oblong, which is working very well on 40 .Generally speaking there is not much difference, if I´m working dx. Soemtimes they are they same, sometimes there is a difference of 3-6db, depending where the signal comes from.The top of the delta loop is up about 17m sloping down to 6m.
Oblong for 80m.I found the design in a Swiss antenna book. The top wire is up about 8m, the bottom wire about 3m, so the vertical section is 5m.At first I fed it in the middle of the vertical section, but I wasn´t happy with the results, the antenna was very noisy!I always thought a loop antenna is generally a quiet antenna, which is not the case.EU was down as expected, because of the vertical polarisation and dx wasn´t that strong.Please keep in mind that our mountains are really high and the waves have to get over them!
Now I feed it in the bottom corner. According to some antenna books this should give me a mixed polarisation.I´ve good swr in the cw portion of the band, but I need a tuner at the top end. The results were ok, but not superb, as I had hoped for. Next year I plan to put it up as a delta loop and see if it is any better.
I put this antenna up during a field day and I could use it on many ham bands with good results.There is a 2: 1 balun and I feed it with coax.
GP for 2m/70cm, above the big beam and UHF/VHF yagi below.
View to the southeast, long path to W6/7.As you can see on this picture, an antenna with a very low take off angle is not a benefit in this valley- but I do get out, even with low dipoles on 40 and 80m.
The peak in the background is the home of our 2m FM repeater OE5XKL(Krippenstein) on 145.712.5-Echolink international:534058.
Should I stay or should I go(dx) now?
cu on the bands,73 Chris
1740771 Last modified: 2015-02-28 18:17:34, 3810 bytes
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