[TowerTalk] Problems with my 2 el tribader yagi

[Carlos Augusto S. Pereira]

Dear friends,

Some months ago I raised a 2 el. tribander Yagi. This antenna is manufactured in Brazil but it is very similar to the Mosley TA-32 (you can use it as a reference). I figured out -21 degrees of magnetic declination according to my latitude and longitude which I used to correct the compass bearing (correcting to the left - compass bearing minus 21). However I could observe a difference of 30-40 degrees between the best signal and the right bearing... For example... Europe is at 35 degrees but most of the best signals happen at 70 degrees. The same happens with K´s, ZL´s etc. always +30-40 degrees.

There is not a balun connected to the antenna. The manufacturer claims it is not necessary but some py friends warned me that this might be the problem. What you guys think about this?

The antenna has 4 guy wires now with the correct lenght (10 ft according to the ARRL Handbook) and there is nothing higher than my antenna all around.

There is a link with a picture of my current setup:

http://www.electril.com.br/revista.htm

The page is in portuguese but what matters is the antenna picture at the bottom.

73 and thanks.

Carlos Augusto S. Pereita PY4RO
www.qsl.net/py4ro
E-mail: py4ro at superig.com.br