[Elecraft] K3 not recieving

[Ron D'Eau Claire]

Good point Cookie. I was not considering a Unun that is also an impedance
transformer. They really are two different things, although in some special
cases such as you describe they can be combined. Another very common one is
the 4:1 Balun used to feed a folded 1/2 wave radiator. 

Ron AC7AC

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From: WILLIS COOKE [mailto:wrcooke at yahoo.com] 
Sent: Tuesday, March 08, 2011 3:18 PM
To: Ron D'Eau Claire; David Herring; Vernon Mauery
Cc: Elecraft Mailing List
Subject: Re: [Elecraft] K3 not recieving

I uses a 4:1 UnUn to feed a 105 ft. Marconi strung horizontally from the
sail of a submarine to a mast on the stern because EZNEC tells me that the
radiation resistance in near 200 ohms on the frequencies of interest and it
allows me to ground the braid where the coax exits the sail in effort to
minimize the radiation inside the metallic sail and the hull.  BalUns and
UnUns look a lot alike and are made from the same materials, but they are
not wound the same and are not interchangable.  Hopefully if you buy a 43
foot vertical and it comes with a transformer they will give you the right
thing, but if you home brew an antenna system you need to know the
difference.
 
Willis 'Cookie' Cooke 
K5EWJ