Roelof,
I have used the arrangment you are asking about several times and it has
worked well for me. One key point is that baluns are not effective under
some load conditions, usually when they are transforming high
impedence/highly reactive loads. So if you encounter problems matching
the antenna on some bands you can "adjust" the load that the balun sees
(from the antenna) by adding a short piece of transmission line between the
balun and the antenna. This technique uses transmission line properties to
"transform" the impedence to a value that the balun is more capable of
handling. You may find that you need to add a piece to you transmission
line on one or two bands. The specific lengths depend on your specific
installation. The ARRL Antenna Book is a good place to learn about
transmission line properties and how to use them. There are many other
sources of this information as well.
I hope this information helps.
Robie - AJ4F
----- Original Message -----
From: "Roelof Bakker" <[EMAIL PROTECTED]>
To: <Elecraft@mailman.qth.net>
Sent: Wednesday, August 15, 2007 8:44 AM
Subject: [Elecraft] K2, KAT2 and displaced choke balun feed
Hello all,
I have just finished K2 # 6177 and with all HF bands to my disposal, I am
looking for a more convenient way to feed my doublet wire antenna with
open feeder. My shack is in the dining room (my wife is very forgiving)
and the antenna feed-in is on the window sil at the opposite side of the
room. Hence I use 6 metre coax to get there.
Has anyone tried a K2 and KAT2 fed into a substantial length of 50 ohm
coax
with a choke balun mounted at the other end, connected to an open line
feeder? So far I have used a manual balanced tuner on the window sil, but
that implies getting up and walking to the tuner when changing bands.
Thank you in advance,
Roelof Bakker, pa0rdt
G-QRP-C 6019
QRP-ARCI 8405
Middelburg, Netherlands
JO11tm
--
Mijn Postvak In wordt beschermd door SPAMfighter.
203 spam-mails zijn er tot op heden geblokkeerd.
Download de gratis SPAMfighter via deze link:
http://www.spamfighter.com/lnl
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
