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[TenTec] ladder line

To: tentec@contesting.com
Subject: [TenTec] ladder line
From: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 10 Jul 2005 20:01:00 +0000
List-post: <mailto:tentec@contesting.com>

<<<The 10dB between the zepp with ladder line and the Titan most likely had almost everything to do with how poor the Titan is on 75 and almost nothing to do with ladder line. A GAP Challenger also covers 75 -- meaning only that it presents a nominally resonant 50 ohm load. Almost anything else you can put in the air will radiate significantly better, open wire feed or not :-)

Grant/NQ5T>>>

mistake here; i was in a hurry and wrote 75 meters last night; in the clarity of morning, i recalled that the comparisons were on 40, still, the gap antenna isn't real great there either, but much better than 75. however as Rick said, the polarity makes some difference and the guy on the other end was pretty close, about 200 miles away, so of course a cloud burner would do better. the gap on 40 is a little better at a few thousand miles out but a lot also depends on conditions and the direction of the station i'm working. regardless of take off angle etc. i think the bal. fed wire ant. is more efficient than the gap. i think probably more rf is getting into the air with the bal. feed, and parallel L network matching circuit. The gaps do okay in their middle bands from my experience. titan is okay on 20, 17, 15. 40 is so so. don't know about 10, 12 but i have heard it isn't very good there. maybe there is loss in the coax stubs. 75 prob. is because ant. is so physically small i'm betting.

rob/k5uj

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