[ICOM] 60 Mtr Operation with ICOM 746

[Larry Young]

Sorry Mac: I now understand that your tuner operated, but was unable to obtain a match. As stated previously, internal tuners have a very limited matching ability. Not nearly as much as do most external tuners.
Larry K4LXV.

--- On Sun, 10/25/09, D C *Mac* Macdonald <k2gkk at hotmail.com> wrote:

From: D C *Mac* Macdonald <k2gkk at hotmail.com>
Subject: Re: [ICOM] 60 Mtr Operation with ICOM 746
To: "Icom Forum" <icom at mailman.qth.net>
Date: Sunday, October 25, 2009, 7:28 AM


Since the function of a "tuner" is to obtain a match,

and I stated that the internal failed to function, I

thought it would be obvious that this meant it did

not find a match.  The antenna loads up fine with a

wider range tuner as I also stated.

 

73 - Mac, K2GKK/5

(Since 30 Nov 53)

Oklahoma City, OK


 
> Date: Sat, 24 Oct 2009 20:26:18 -0700
> From: k4lxv at bellsouth.net
> To: icom at mailman.qth.net
> Subject: Re: [ICOM] 60 Mtr Operation with ICOM 746
> 
> Most internal antenna tuners only have a matching capability of about  3:1. That imeans they are specifieded to match about 15 to 150 ohms  mismatch only. it the impedance is higher or lower than these values, it may not be able to match. When you stated that your antenna did not function, did you mean it functioned (operated) but could not find a match?
> 
> --- On Sat, 10/24/09, D C *Mac* Macdonald <k2gkk at hotmail.com> wrote:
> 
> From: D C *Mac* Macdonald <k2gkk at hotmail.com>
> Subject: Re: [ICOM] 60 Mtr Operation with ICOM 746
> To: "Icom Forum" <icom at mailman.qth.net>
> Date: Saturday, October 24, 2009, 10:04 PM
> 
> 
> If you'll check the W0QE link that Mike, KK2DOG provided
> you'll see that I have already checked operation of the
> original IC-746 on 60m.  I have NOT been able to get the
> internal tuner to function on my antenna (450 Ohm Ladder
> Line-fed, 120' center-fed dipole).  I am able to get that
> antenna to tune satisfactorily with an LDG AT-200 Pro
> autotuner IF I start with minimum power!
> 
 73 - Mac, K2GKK/5
> 
> > From: kk2dog at hotmail.com
> > To: icom at mailman.qth.net
> > Date: Sat, 24 Oct 2009 13:59:09 -0400
> > Subject: Re: [ICOM] 60 Mtr Operation with ICOM 746
> > 
> > Ted,
> > 
> > I don't have that info, but this is a neat link for those who are considering
> > using their rigs on 60-meters: 
> > http://www.bnk.com/w0qe/60m_operation.html
> > 
> > Mike KK2DOG
> > 
> > www.hamwave.com 
                           
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