[Elecraft] An Antenna for the BL2 Balun

John Meade jm416 at optonline.net
Sat Dec 2 08:57:23 EST 2006


I was reading the ARRL's "Wire Antenna Classics" and noticed an interesting 
antenna (not that all of them aren't interesting hi hi).  This was an 
article by G0FAH called "Four Bands, Off Center" (p 1-13, also from QST, Feb 
1996).

It is a 69-foot antenna with the feedpoint 23 feet from one side and 46 feet 
from the other.  From the antenna to the balun is either 55 or 111 feet of 
450-ohm line, or, 50 or 110 feet of 300-ohm line.  From the balun to the rig 
is any length of 50-ohm coax.

For 40, 20, and 10 meters, the balun is 4:1.  For 15 meters, the balun is 
1:1.  According to the article, no tuner is needed.

Since the BL2 has a switch for 4:1 or 1:1, this may be an application 
without an antenna tuner.

There is no mention of 30m, so that is an unknown. Another unknown might be 
the matching with respect to height above ground.

By the way, I bought a blank BL2 PC board and switch from Elecraft and made 
my BL1 into a switchable 4:1 or 1:1 balun.

72,

John W2XS
K2 #1116
KX1 #15 




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