[TowerTalk] Screwdriver antenna on the porch roof

[Mike Rhodes]

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" <wa3gin at erols.com>
To: "TowerTalk" <TowerTalk at 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?
>
> thanks,
> dave
> wa3gin
>
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