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Re: [TenTec] SWR is a DUMB Indicator of Antenna Performance

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] SWR is a DUMB Indicator of Antenna Performance
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 15 Sep 2014 16:13:17 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
OK, I'll fall for it, how does a cable have a negative dielectric loss figure?

73
Bob, K4TAX


----- Original Message ----- From: "Steve Hunt" <steve@karinya.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, September 15, 2014 3:55 PM
Subject: Re: [TenTec] SWR is a DUMB Indicator of Antenna Performance


Be careful using those "additional loss due to SWR" tables; in some circumstances the unmatched cable loss can be *less* than its matched loss.

Steve G3TXQ


On 15/09/2014 15:01, Bob McGraw - K4TAX wrote:
One needs to consult the published charts and tables to determine the matched loss for a given type of feedline and then an additional table to add the loss value when the feedline is operated with some value of SWR other than a 1:1 condition or matched condition.

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