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Topband: 160 Meters Mobile Antenna Suggestions

To: <topband@contesting.com>
Subject: Topband: 160 Meters Mobile Antenna Suggestions
From: w7ti at ispwest.com (Bill Turner)
Date: Wed May 7 18:29:54 2003
On Wed, 07 May 2003 19:55:55 +0000, you wrote:

>>A 160 meter mobile antenna is going to have a very narrow bandwidth so
>>it may not be effective for BCB unless you are able to tune it
>>somehow.  2:1 SWR bandwidth typically will be on the order of 20-30
>>kHz.
>
>That's being very optimistic for such a short antenna.  My 110' high 80m 
>(135' in length) dipole with open wire tuned feeders, using a balanced 
>link-coupled tuner wih split-stator cap, parallel fed, is more like +/-  8 
>kHz.  I would expect an efficient 160m. mobile installation to be 
>essentially a single-channel affair.

Perhaps that is optimistic.  I'm going from memory of several years
ago.  It depends greatly on the Q you achieve with the loading coil.
The point is, don't expect much in the way of bandwidth.

-- 
Bill, W7TI

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