[TowerTalk] choke / balun design needed

[Jim Thomson]

Date: Tue, 28 Apr 2015 13:37:35 -0400
From: Alex Malyava <alex.k2bb at gmail.com>
To: towertalk <towertalk at contesting.com>
Subject: Re: [TowerTalk] choke / balun design needed
Message-ID:

so,
what do I do for simple inverted vee or sloped dipole?
1:1 voltage balun or coax choke?


##  Use a good choke balun.  Use some type-31 cores,
like the 2.4 inch OD variety....then optimize the choke
design for the 30m band....  10.1  to 10.15 mhz. 
Since the choke only has to work on one band, it will be easier 
to optimize it for 30m band. K9YC has some excellent cook book
designs on his tutorial.   An optimized 30m choke, plus the 30m 
dipole, fed with coax, is as good as it gets.  Swr will be dead flat
since the band is only 50 khz wide. 

##  A sloping dipole will no doubt un balance the entire mess. 
Use the inverted vee configuration.  A 30m dipole is aprx  46 ft long,
so 23 ft per leg.  End of problem.

Jim   VE7RF