[TowerTalk] 160m antennas

Jim Jarvis jimjarvis at comcast.net
Mon Dec 1 21:48:18 EST 2003


I commented off-reflector...but this is getting interesting,
so forgive me for wading in, if this is obvious to you:

1)  Make an inverted Ell using the tower.  You can't decouple
	it..it'll have stray currents anyway...so you might as well
	control it. 

2)  Put in the best ground system you can muster around the
	tower.  It'll serve you well.

3)  Concentrate on receiving antennas.  They're every bit as 
	important.

4)   As an alternate to #1, consider a top-fed L, per Cebik's 
	article.  It's a bit hard to organize, but looks promising.
	All that current is as high as you can get it....earth losses
	are minimized, within your boundaries.

5)  As an alternate to #1 and #4, try a YCCC U dipole.  It's a 
	vertical section as high as you can manage...with balanced
	horizontal sections up high, and down low, to make up a 
	bent dipole.  This works.  And it can be made 2 band, using
	twinlead.  Most radiation is low angle from the vertical 
	section.  The horizontal section fields cancel.  Sort of,
	more or less.  

6)  revisit #3....somebody suggested an on-ground beverage.
	If your ground is actually 30' below the earth's surface,
	or 20, or 10, this might be a good solution.  Worth trying.  
	Otherwise, it's EWES for youse!  

73/n2ea

 



More information about the TowerTalk mailing list