[TenTec] Fw: Bazooka antenna.. More than you wanted to know!

[Jim WA9YSD]

OOOOPS Correction:
Bazooka eliminates the use of a balun that matches a balanced antenna
to unbalance feed line makeing the DB a more reliable antenna. 
Normally you would use a 6:1 balanced to balanced balun at the feed
point of an FD and attach a balanced to unbalanced 1:1 current balun to it.  Too many pieces
to fail for one reason or another.


 Keep The Faith, Jim K9TF/WA9YSD



----- Forwarded Message ----
From: Jim WA9YSD <wa9ysd at yahoo.com>
To: tentec at contesting.com
Sent: Thursday, June 5, 2008 6:36:29 PM
Subject: Re: Bazooka antenna.. More than you wanted to know!


Jerry,  Both the FD and bazooka on UHF/VHF antenna test use tubing with a large diameters.  This gave the antennas band width among other things.
The folded dipole had tubing on only one side.

The charts on the FD went off the scale with just wire on both half's and with large spaced spreaders.  Programs cannot adjust to it to give you any thing accurate unless and accurate simulation is built, other wise your guessing on its performance.

The crossed Double Bazooka will give you more band width I think 1.5 times more than a dipole.  Wide spaced FD about 2.0 times more than a dipole.  Whats the increased band width with the 2000pf cap and 3 foot cable combo compared to a dipole?

Bazooka eliminates the use of a balun that matches a balanced antenna to unbalance feed line makeing the DB a more reliable antenna.  Normally you would use a 6:1 balanced to balanced balun at the feed point of an FD and attach a 1:1 current balun to it.  Too many pieces to fail for one reason or another.


 Keep The Faith, Jim K9TF/WA9YSD