zondag 29 juni 2014

Field test EndFed Wire Antenna lifted by a Kite!

Two weeks ago,Ramon (PE1OUW) asked me to join him and some other Ham`s on a field trip,where they would lift a wire antenna by means of a kite!I thought,yeah,why not ,interresting to see how a kite lifts a 20 meter wire antenna up in to the sky.So we went of to a location somewhere between the city of Purmerend and Amsterdam called Wijdewormer.On this location there`s plenty of space for the experiment and little to zero QRM.
After we arrived,Ramon prepaired the kite and the other Ham`s set-up the Kenwood TS-430 HF transceiver.This transceiver was set up in a case for field day`s.There is also a antenna tuner and a external speaker in the case.After the kite was in the air,we tried to lift up a 40 meter wire with a 1:9 Unun balun.Because there was not enough wind,the wire was lifted only half way.
Luckely,I brought my EndFed wire antenna with me.Because it consist of only half the lenght of wire (20 meters) in stead of the 40 meters with the 1:9,we managed to get the wire up in the air.So the kite was at 100 meters and the whole EndFed was up in the air like a vertical.Now we could start to make some calles.The first thing we noticed was the low QRM.As soon as we turned the radio on,a lot of stations could be heared.It wouldn`t take long before Ramon made his first QSO.We tested the EndFed wire on the band it`s supposed to work without the tuner.On 10,15,20 and 40 meters,the tuner was not needed.Very low SWR value`s.Only at the end of the 40 meter band at 7,199,5MHz the SWR was 1:2.Still no problem.
We also did some QSO`s on the 17 and 80 meter band.Now the external antenna tuner was needed.On the picture you see me making a QSO on 40 or 80 meters,I,m not sure,on the Dutch vacation round.


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