Hi Tom.

This is normal, because the SWR is being measured after the built-in tuner, 
which will affect the apparent SWR to the radio, but not the real SWR of 
the antenna system, which is what your SWR meter is measuring.  In order to 
measure the effects of having a tuner in the system, your meter would need 
to be between the tuner and the radio--pretty tough to do if you are using 
a radio with a built-in tuner.

73, de Lou K2LKK



At 11:06 PM 4/16/2009 -0400, you wrote:
>Hi, all.
>
>Tonight, I was testing my HF antennas to see how they fared through the
>winter, and noticed something that I don't think is a problem, but just want
>to be sure.
>
>I have the TW1 connected between my home shack TS480 and my antenna switch
>which holds three HF antennas--an 80-meter dipole, my Windom, and my triband
>beam.
>
>I have noticed that with this current set-up, the SWR's remain consistent
>whether or not I use the auto-tuner in the TS480.  In other words, I get the
>same basic SWR reading whether the auto-tuner is used or not.
>
>I assume this is what one would expect, since the TS480 is giving me the
>true SWR reading.
>
>Is this a correct assumption?
>
>Again, I have the TW1 connected between the rig and my antenna switch
>containing my 3 HF antennas.
>
>Please help refresh this increasingly old and feeble mind!  (HI!  HI!)
>
>73 from Tom Behler:  KB8TYJ

Louis Kim Kline
A.R.S. K2LKK
Home e-mail:  [log in to unmask]
Work e-mail:  [log in to unmask]
Work Telephone:  (585) 697-5740