|Subject:||[TowerTalk] Feedline loss|
|From:||Pete Smith <firstname.lastname@example.org>|
|Date:||Mon, 22 Nov 2004 10:06:53 -0500|
This weekend, I noticed that one of the 4 dipoles in my K3LR 80m array has
suddenly developed very broadband characteristics. At its design frequency
of 3525 Khz the SWR is about 1.3:1, and at 3850 it is only 1.45. By
contrast, the other dipoles in the array show well over 3:1 SWR at 3850.|
My hypothesis is that the RG-8X feedline, which is the oldest one in the array - about 6 years old - has become very lossy, and the resulting resistance is being summed with the antenna impedance, producing the moral equivalent of one of those resistor-loaded center insulators that the guy in Florida was selling as an "automatic antenna tuner."
Any other possibilities I should be thinking of?
73, Pete N4ZR
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