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Re: [TenTec] Jupiter Autotuner upgrade?

To: Clayton Brantley <clayton_n4ev@yahoo.com>, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Jupiter Autotuner upgrade?
From: Richards <jruing@ameritech.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 30 Nov 2011 19:06:22 -0500
List-post: <mailto:tentec@contesting.com>
I agree with the general proposition it is better to adjust/tune at the feed point, but I also believe one might clean up a relatively small mismatch using the internal tuner.

For example, I have a nice Off Center Fed (OCF) dipole that has wonderfully low SWR (i.e., below 1.4 : 1) on three bands, but is about 2.5 : 1 on 10 meters. The internal tuner cleans that up nicely. It would not be cost effective to put an external tuner out on my 50 foot mast just to clean up this little bit of mismatch on one band.

While this does not belie the general rule, it is one scenario under which using the internal tuner makes sense.

Just MY take.

===========================  K8JHR ========================


On 11/30/2011 8:57 AM, Clayton Brantley wrote:
In going back to the broadcast days, we always put the tuner AT the antenna and
had a "flat" line for the antenna to the transmitter.  Works better than a line 
full
of VSWR in the shack.

In my view, internal tuners are to be avoided.  No exceptions.

Clayton N4EV



________________________________
  From: Richards<jruing@ameritech.net>
To: Discussion of Ten-Tec Equipment<tentec@contesting.com>
Sent: Tuesday, November 29, 2011 11:05 PM
Subject: Re: [TenTec] Jupiter Autotuner upgrade?

Based on my experience with the built-in auto tuner on my Omni VII it
will not usually outdo the external tuners, but I don't know what MFJ
tuner you have... but most will be more robust than the TT tuner.

That's MY take...

==========================  K8JHR ===========================


On 11/29/2011 12:26 PM, John wrote:
I am considering adding the autotuner to my Jupiter.  My normal antenna
for now is a G5RV with plans for getting my R-7 Vertical back on the air
ASAP.  Other than making me feel better, what is gained by adding the
autotuner to the mix.  The G5RV gets quirky to tune on 80 and 40 using
my MFJ tuner. Will a G5RV be within the tuning range of the TT autotuner
with these bands and antenna?  Any experiences are appreciated.

73,

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