[Icom] RE: Antenna Balun/IC-756PRO

Thu, 17 Oct 2002 09:28:06 -0700

I am curious. I thought no attachments were allowed. Yet I have received two emails
from thei reflector recently with attachments.

          Rolly  W7DGX

Karl Kanalz wrote:

> In a word, Jim, NO.
>
> No, the internal tuners of iCOM radios (and those of Yaesu, for that
> matter) can typically tune out a VSWR of only 3:1  .  That means that on
> bands other than 80M, your half-wave (80M) dipole will have a widely (and
> wildly) varying VSWR that the '756 internal tuner will not handle.
>
> Please stick with using your external antenna tuner if you want to continue
> using the dipole on "all bands" and make it easier on your '756.    PLUS,
> the output of your '756 is an unbalanced feed point, and you'll need the
> tuner and/or a current balun to provide an interface to your balanced
> ladder line.
>
> Karl K - W8TIF
> McKinney, Texas
>
> -----Original Message-----
> From:   res075cz [SMTP:[email protected]]
> Sent:   Wednesday, October 16, 2002 5:30 PM
> To:     Icom
> Subject:        [Icom] Antenna Balun/IC-756PRO
>
> I  have an 80 meter half wave dipole fed in the center with ladder line. I
> have been using an external antenna tuner for years to tune this antenna to
> all bands.
> If I use a BALUN and then coax into my IC-756PRO, does the internal tuner
> have the range to tune this antenna on all bands above 80 meters?
> 73 de Jim, K5ROV...
> James (Jim) Parsons, K5ROV
>
>                   Name: WINMAIL.DAT
>    WINMAIL.DAT    Type: DAT File (application/x-unknown-content-type-DAT_auto_file)
>               Encoding: x-uuencode
>
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