Topband
[Top] [All Lists]

Re: Topband: Beverage resistor triming

To: "Paul Baldock" <pbaldock@verizon.net>, <topband@contesting.com>
Subject: Re: Topband: Beverage resistor triming
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Wed, 28 Dec 2005 07:17:32 -0500
List-post: <mailto:topband@contesting.com>
> Is the tune for minimum SWR a flawed idea?

You tune for minimum SWR *VARIATION* as frequency is
changed, not minimum SWR.

In other words you sweep the antenna over a wide frequency
range while watching SWR at the antenna feedpoint (through a
matching transformer is OK, but not through a long
feedline). When the termination is proper the antenna will
have minimal SWR variation or change over a very wide
frequency range.

This says nothing about the absolute SWR value, just the
fact it varies in value. In other words 3:1 is OK as long as
it is nearly the same 3:1 from 1.8 to 4MHz.

73 Tom

_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband

<Prev in Thread] Current Thread [Next in Thread>