RF Feedback ?? Might try a choke at the antenna end of the feedline. Just a
guess but pretty easy to try.
Mike / W8DN
----- Original Message -----
From: "David Jordan" <email@example.com>
To: "TowerTalk" <TowerTalk@contesting.com>
Sent: Sunday, March 16, 2003 7:03 PM
Subject: [TowerTalk] Screwdriver antenna on the porch roof
> Hi folks,
> Was visiting a ham buddy today. He has a Hi-Sierra El Dorado. on 75m
> the antenna loads great as per the MFJ 259. But when we put the juice
> to it from the ICOM 746 the ICOM shows a very high swr. However, when
> we engage the auto-tuner in the 746 the rig loads up the antenna in a
> heart beat. On 40-10m the antenna works fine with the ICOM...no tuner
> needed. The readings on the MFJ on 40-10m were achieved in the same
> method used for 80m, simply move the coil to the position where SWR was
> 1:1, etc. On 40-10m the readings on the MFJ and the readings on the ICOM
> 746 were identical. However, no problems exist on the 746 on 40-10m.
> Any ideas why 80m is acting strange? Is this a 746 proclivity?
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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