I would agree that a 1:1 balun is preferable in as much as a center fed
dipole appears to have a balanced feed point while a coax feed line is
unbalanced. In addition, a common mode choke at the feed point is
suggested. For 100 ft of RG-8x at 14 MHz the loss is ~ 1.25 dB when
matched. Other than using a balanced feed system, which will much more
complex to install, RG-8x is about the best way to go. You may also
find that a 2nd common mode choke at the radio will also be helpful as
well.
The Balun Designs products work very well in this regard. For Common
Mode Chokes, in several applications I use a product from The Wireman
being model #8232. This is a 3' coax jumper with beads and is good for
160M - 10M at near legal limit power.
73
Bob, K4TAX
K3S s/n 10,163
On 9/28/2015 7:40 PM, Walter Underwood wrote:
A 1:1 current balun could be very useful at rejecting nearby common-mode
interference. At my house, that dropped the noise floor by about 6dB.
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