[TowerTalk] Open wire feed line length

Steve Hunt steve at karinya.net
Wed Jul 2 17:12:17 EDT 2008

Richards wrote:
> okay, that makes sense to me.    But, then why do they use
> a 4:1 balun for open feeder line?

Because open-wire feeder is often used in applications where it is
unmatched - for example a doublet. Although the characteristic impedance
of the feeder might be 450 Ohms, in these applications the impedance
presented at the ATU is likely to be something completely different.

Steve G3TXQ

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