Yes, that 18% loss is consistent even with other Kenwood rigs.
I know 15 watts or so doesn't make a wit of difference, but since I have an
external tuner, I leave the internal tuner out of the loop entirely.
----- Original Message -----
From: Ed Malmgren
To: [log in to unmask]
Sent: Friday, July 20, 2012 6:34 PM
Subject: Re: External tuner vs internal tuner?
I just checked my 590 internal tuner verses no tuner into a dummy load and I
loose 18 percent with the internal configuration. You have to double your
power to gain 3 D B's so chances are no one would ever know one way or the
other. The best is to have resonant antennas but that not always possible.
73 Ed K7UC
--------------------------------------------------
From: "Jim Gammon" <[log in to unmask]>
Sent: Friday, July 20,2012 2:52 PM
To: <[log in to unmask]>
Subject: Re: External tuner vs internal tuner?
> Hi Steve, your explanation is great. I think at this point, I
> will just go with the TS-480 with its internal tuner. I plan to
> work with the Alpha 1 this weekend band conditions permitting or
> not. Will hopefully send some remarks after tests tomorrow. Jim
> WA6EKS.
>
> ----- Original Message -----
> From: Steve <[log in to unmask]
> To: [log in to unmask]
> Date sent: Fri, 20 Jul 2012 14:02:36 -0400
> Subject: Re: External tuner vs internal tuner?
>
> Jim,
>
> Typically, the internal tuner won't match much more than a 3:1 or
> maybe at
> the outside 6:1 SWR, the older internal tuners on the TS-850
> would match
> 10:1. Now, some of that might depend on your reactances, but
> since they
> have small caps, they don't have the capabilities of external
> tuners.
>
> Then, let's say you have a couple different scenarios. First,
> let's say you
> want to be real efficient and feed your wire antenna with
> open-wire. You
> could try running it through a balun, but it would probably be
> easier to
> have an external tuner with the balanced feed point on it.
>
> The second scenario: you want to run a linear amp. You'll then
> definitely
> need an external tuner.
>
>
> ----- Original Message -----
> From: Jim Gammon
> To: [log in to unmask]
> Sent: Thursday, July 19, 2012 1:10 PM
> Subject: External tuner vs internal tuner?
>
>
> Steve, what advantage is there to using an external auto tuner
> over the internal tuner in the TS-480? I have the 100 w model and
> really think it's a great rig. That question about the tuner has
> nagged at me though. I have been wondering if it would be
> worthwhile to get something like an MFJ external tuner, or is
> that simply redundant because of the existing internal one. I
> have occasionally used the rig running low power when I had
> terrible SWR and still worked stations. Jim WA6EKS
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