I feed mine at the top with 600 ohm open wire line from W7FG. Mine is open
at the bottom allowing it to be used on 160 & 40.... I run the ladder line
directly into the shack to the tuner.
73
MAL
N7MAL
BULLHEAD CITY, AZ
http://www.n7mal.com
Everyone in the world is
entitled to be burdened
by my opinion
----- Original Message -----
From: Felipe Ceglia - PY1NB
To: towertalk@contesting.com
Sent: Monday, December 08, 2008 13:08
Subject: [TowerTalk] 80m delta loop question
Hello gurus,
After reading the loop section on Low Band DXing, I decided to build a
delta loop for 80m, mostly vertically oriented, and fed 1/4 lambda from
apex. Planning to use ladder line, so I will be able to use it on CW and
SSB portion (PY's are allowed to use only upt to 3.8mhz).
The author suggests using 450ohm ladder line for feeding it, but I could
not find much details about it, so I ask:
Which antenna matching configuration should I use at the end of the
ladder line to transform it to 50ohm?
Could I use other impedance on the ladder line, say 300ohm? Is it critical?
Would I need a given lenght for the ladder line, or could I go random?
73 and thanks,
--
Felipe Ceglia - PY1NB
PR1T team member - Rio DX Group
http://www.dxwatch.com
http://skimmer.dxwatch.com
http://riodxgroup.dxwatch.com
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