Sunday, August 7, 2011

STEPPIR is up

the beam  tilt up leveled exact with the rotor pipe makes it a one man job. 


Some issues came up during assembling.

The rotor pipe is limited to 50mm by the U-bolts while even a light Kenpro 400  accepts 65mm.
Why using  outlet muffler type "no grip"  U-bolts   instead of threaded  U-bolts
Threaded U-bolts have much more grip and do not need to be bolted extreme to prevent the antenna twisting around destroying the cables.
I made my own stainless M8 threaded U-bolts again..
Also Fritzel beams FB33 use this type of non threaded U-clamps they hold only  when the tube diameter fits precise the clamp saddle and then bolt it very firmly with the risk of lacing up the beam.
The first storm here  already did break the beam through the clamps.
But must say I am using temporary a  40mm rotor pipe not the 50mm maximum size. That makes it a lot weaker connection.  Since 50 to 40 mm diameter means 20% more force on the clamps plus that they do do not fit correct.


A weatherproof coax connection to the EHU SO239 is not provided.
A fixed flexible cable outlet with a SO239 seems a better solution to me.

 
You see my point..

The beam seems to work very well  after having possible bad terminal connection to the reflector.
Even 6m did receive  but about 10db weaker signal compared to the 7ele  at 22m and 30m H2000 not bad at all.
Compared to my trap dipole at 22m,  28MHz is clearly better   20 and 15 too and having lower noise level.
F-B  is very good now   at least 3 S units at 20m  I could reverse the beam to east for TA  close to a strong W con-tester  and that really made the difference between bad and clear copy.
Need more time to compare to say more.

2 comments:

PE4BAS, Bas said...

Mooie foto's Jaap, de mast lijkt helemaal niet zo hoog als de antenne omhoog staat. Inderdaad is een stukje coax met een connector dan wel een betere optie. Maar met een beetje zelf vulcaniserende tape kom je ook een heel eind. Antenne werkt goed neem ik aan? Nu nog condities. 73, Bas

svmerketing said...

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